{"id":18319,"date":"2026-07-18T21:53:50","date_gmt":"2026-07-18T12:53:50","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=18319"},"modified":"2026-07-18T21:53:50","modified_gmt":"2026-07-18T12:53:50","slug":"cc-java-methods","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-java-methods\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011Java\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5b9a\u7fa9\u30fb\u547c\u3073\u51fa\u3057\u30fb\u5f15\u6570\u30fb\u623b\u308a\u5024\u30fbstatic\u307e\u3067\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"\n<style>\n.g-flow-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;}\n.g-flow-item{background:linear-gradient(135deg,#1a1a1a,#2a1015);color:#fff;border-radius:8px;padding:16px 14px;min-width:130px;flex:1;text-align:center;}\n.g-flow-arrow{color:#dc2626;font-size:20px;font-weight:700;}\n.g-card-row{display:flex;gap:12px;flex-wrap:wrap;margin:0 0 32px;}\n.g-card-row>div{flex:1;min-width:220px;}\n@media(max-width:600px){\n  .g-flow-row{flex-direction:column;}\n  .g-flow-arrow{transform:rotate(90deg);}\n  .g-card-row{flex-direction:column;}\n  .g-card-row>div{min-width:100%;}\n}\n<\/style>\n\n\n\n<div style=\"margin:0 0 32px;\">\n  <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/07\/thumb-cc-java-methods.jpg\" alt=\"\u30102026\u5e747\u6708\u6700\u65b0\u3011Java\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5b9a\u7fa9\u30fb\u547c\u3073\u51fa\u3057\u30fb\u5f15\u6570\u30fb\u623b\u308a\u5024\u30fbstatic\u307e\u3067\u5fb9\u5e95\u89e3\u8aac\" style=\"width:100%;height:auto;border-radius:12px;display:block;\">\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-radius:12px;padding:24px 28px;margin:0 0 32px;border-left:4px solid #dc2626;\">\n  <p style=\"font-size:15px;font-weight:700;color:#1a1a1a;margin:0 0 16px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9<\/p>\n  <ol style=\"margin:0;padding-left:20px;font-size:14px;line-height:2.2;list-style:none;\">\n    <li><a href=\"#sec-01\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">01<\/span>Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u4f55\u304b\uff08\u95a2\u6570\u3068\u306e\u9055\u3044\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3067\u306e\u5f79\u5272\uff09<\/a><\/li>\n    <li><a href=\"#sec-02\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">02<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5b9a\u7fa9\u65b9\u6cd5\uff08\u623b\u308a\u5024\u306e\u578b\u30fb\u30e1\u30bd\u30c3\u30c9\u540d\u30fb\u5f15\u6570\u306e\u66f8\u304d\u65b9\uff09<\/a><\/li>\n    <li><a href=\"#sec-03\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">03<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u65b9\uff08\u540c\u30af\u30e9\u30b9\u5185\u30fb\u5225\u30af\u30e9\u30b9\u304b\u3089\uff09<\/a><\/li>\n    <li><a href=\"#sec-04\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">04<\/span>\u5f15\u6570\u306e\u4f7f\u3044\u65b9\uff08\u5358\u4e00\u30fb\u8907\u6570\u30fb\u53ef\u5909\u9577\u5f15\u6570\uff09<\/a><\/li>\n    <li><a href=\"#sec-05\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">05<\/span>\u623b\u308a\u5024\u3068return\u6587\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n    <li><a href=\"#sec-06\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">06<\/span>void\u30e1\u30bd\u30c3\u30c9\uff08\u623b\u308a\u5024\u306a\u3057\uff09\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n    <li><a href=\"#sec-07\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">07<\/span>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff08\u540c\u540d\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u5b9a\u7fa9\uff09<\/a><\/li>\n    <li><a href=\"#sec-08\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">08<\/span>static\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n    <li><a href=\"#sec-09\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">09<\/span>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6d3b\u7528<\/a><\/li>\n    <li><a href=\"#sec-10\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">10<\/span>\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u6d3b\u7528\u4e8b\u4f8b<\/a><\/li>\n    <li><a href=\"#sec-11\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">11<\/span>Claude Code\u3067Java\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3092\u81ea\u52d5\u5316\u3059\u308b<\/a><\/li>\n    <li><a href=\"#faq\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#dc2626;font-weight:700;margin-right:8px;\">FAQ<\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n  <\/ol>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJava\u306e\u30e1\u30bd\u30c3\u30c9\u3063\u3066\u4f55\uff1f\u3069\u3046\u66f8\u304f\u306e\uff1f\u300d\u2014\u2014\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3073\u59cb\u3081\u305f\u65b9\u3001\u3042\u308b\u3044\u306f\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3092\u89e6\u308a\u59cb\u3081\u305f\u65b9\u304c\u6700\u521d\u306b\u76f4\u9762\u3059\u308b\u58c1\u304c\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306b\u304a\u3051\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3001<strong>\u51e6\u7406\u306e\u307e\u3068\u307e\u308a\u306b\u540d\u524d\u3092\u3064\u3051\u3066\u518d\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u4ed5\u7d44\u307f<\/strong>\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u6838\u3092\u62c5\u3046\u6982\u5ff5\u3067\u3042\u308a\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u304d\u3061\u3093\u3068\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u30fb\u4fdd\u5b88\u6027\u30fb\u518d\u5229\u7528\u6027\u304c\u683c\u6bb5\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u304b\u3089\u3001\u5b9a\u7fa9\u30fb\u547c\u3073\u51fa\u3057\u30fb\u5f15\u6570\u30fb\u623b\u308a\u5024\u30fb\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u30fbstatic\u30e1\u30bd\u30c3\u30c9\u30fb\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u307e\u3067\u3092\u3001<strong>\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306b\u4f7f\u3048\u308b\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b<\/strong>\u3068\u3068\u3082\u306b\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u5f8c\u534a\u3067\u306f\u3001<strong>Claude Code\u3067Java\u306e\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3092\u81ea\u52d5\u5316\u3059\u308b<\/strong>\u65b9\u6cd5\u3082\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u300c\u51e6\u7406\u306b\u540d\u524d\u3092\u3064\u3051\u3066\u4f55\u5ea6\u3067\u3082\u547c\u3073\u51fa\u305b\u308b\u4fbf\u5229\u306a\u7bb1\u300d\u3067\u3059\u3002\u4e00\u5ea6\u4f5c\u3063\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u518d\u5229\u7528\u3067\u304d\u308b\u306e\u3067\u3001\u540c\u3058\u30b3\u30fc\u30c9\u3092\u4f55\u5ea6\u3082\u66f8\u304f\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u52b9\u7387\u5316\u306e\u6839\u5e79\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u6700\u521d\u306f\u300c\u306a\u3093\u3067\u308f\u3056\u308f\u3056\u30e1\u30bd\u30c3\u30c9\u306b\u3059\u308b\u306e\uff1f\u300d\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30b3\u30fc\u30c9\u304c\u9577\u304f\u306a\u308b\u307b\u3069\u30e1\u30bd\u30c3\u30c9\u306e\u4fa1\u5024\u304c\u5b9f\u611f\u3067\u304d\u307e\u3059\u3002100\u884c\u306e\u30b3\u30fc\u30c9\u304c10\u884c\u306b\u306a\u308b\u3001\u305d\u3093\u306a\u9b54\u6cd5\u306e\u3088\u3046\u306a\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3080\u3068\u3001\u4ee5\u4e0b\u306e\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Java\u30e1\u30bd\u30c3\u30c9\u306e\u5b9a\u7fa9\u69cb\u6587\u3068\u66f8\u304d\u65b9\u306e\u57fa\u672c<\/strong>\uff08\u4fee\u98fe\u5b50\u30fb\u623b\u308a\u5024\u578b\u30fb\u5f15\u6570\u306e\u610f\u5473\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u65b9<\/strong>\uff08\u540c\u3058\u30af\u30e9\u30b9\u5185\u30fb\u5225\u30af\u30e9\u30b9\u304b\u3089\u30fbstatic\u30e1\u30bd\u30c3\u30c9\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u5f15\u6570\u3068\u623b\u308a\u5024\u306e\u4f7f\u3044\u5206\u3051<\/strong>\uff08void vs \u623b\u308a\u5024\u3042\u308a\u30fb\u8907\u6570\u5f15\u6570\u30fb\u53ef\u5909\u9577\u5f15\u6570\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068static\u30e1\u30bd\u30c3\u30c9\u306e\u9055\u3044\u3068\u4f7f\u3044\u6240<\/strong>\uff08\u5b9f\u52d9\u3067\u3059\u3050\u4f7f\u3048\u308b\u5224\u65ad\u57fa\u6e96\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u66f8\u304d\u65b9\u3068\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u5fdc\u7528<\/strong><\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Claude Code\u3092\u4f7f\u3063\u3066Java\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3092\u81ea\u52d5\u5316\u3059\u308b\u65b9\u6cd5<\/strong>\uff08\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u5b9f\u8df5\u53ef\u80fd\uff09<\/span><\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-01\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">01<\/span>\n  <span class=\"section-label\" style=\"display:block;\">WHAT IS A METHOD<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u4f55\u304b<\/span>\n  <span class=\"section-desc\">\u95a2\u6570\u3068\u306e\u9055\u3044\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3067\u306e\u5f79\u5272\u3092\u6574\u7406\u3059\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u3001<strong>\u4e00\u9023\u306e\u51e6\u7406\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3057\u3066\u540d\u524d\u3092\u3064\u3051\u305f\u3082\u306e<\/strong>\u3067\u3059\u3002\u82f1\u8a9e\u306e\u300cmethod\uff08\u65b9\u6cd5\u30fb\u624b\u9806\uff09\u300d\u304c\u8a9e\u6e90\u3067\u3001\u300c\u3053\u306e\u51e6\u7406\u624b\u9806\u306b\u306f\u25cb\u25cb\u3068\u3044\u3046\u540d\u524d\u3092\u3064\u3051\u3066\u304a\u304f\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u6d88\u8cbb\u7a0e\u3092\u8a08\u7b97\u3059\u308b\u51e6\u7406\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u6bce\u56de\u300cprice \u00d7 0.1\u300d\u3068\u66f8\u304f\u306e\u3067\u306f\u306a\u304f\u3001<strong>\u300ccalculateTax\u300d\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u306b\u51e6\u7406\u3092\u307e\u3068\u3081\u3066\u304a\u3051\u3070<\/strong>\u3001\u5fc5\u8981\u306a\u3068\u304d\u306b\u4f55\u5ea6\u3067\u3082\u300ccalculateTax(price)\u300d\u3068\u547c\u3076\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1-1. \u30e1\u30bd\u30c3\u30c9\u3068\u95a2\u6570\u306e\u9055\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u8a00\u8a9e\u3084Python\u306b\u306f\u300c\u95a2\u6570\uff08function\uff09\u300d\u3068\u3044\u3046\u6982\u5ff5\u304c\u3042\u308a\u307e\u3059\u304c\u3001Java\u3067\u306f\u300c\u30e1\u30bd\u30c3\u30c9\uff08method\uff09\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u9055\u3044\u306f\u660e\u78ba\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u9805\u76ee<\/th><th>\u95a2\u6570\uff08C\/Python\u7b49\uff09<\/th><th>\u30e1\u30bd\u30c3\u30c9\uff08Java\uff09<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u6240\u5c5e<\/td><td>\u3069\u3053\u306b\u3067\u3082\u5b9a\u7fa9\u3067\u304d\u308b<\/td><td>\u5fc5\u305a\u30af\u30e9\u30b9\u306e\u4e2d\u306b\u5b9a\u7fa9\u3059\u308b<\/td><\/tr>\n<tr><td>\u547c\u3073\u51fa\u3057\u65b9<\/td><td>\u95a2\u6570\u540d()\u3067\u76f4\u63a5\u547c\u3076<\/td><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9.\u30e1\u30bd\u30c3\u30c9\u540d() \u307e\u305f\u306f \u30af\u30e9\u30b9\u540d.\u30e1\u30bd\u30c3\u30c9\u540d()<\/td><\/tr>\n<tr><td>\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9<\/td><td>\u5f15\u6570\u3067\u53d7\u3051\u53d6\u308b\u306e\u304c\u57fa\u672c<\/td><td>\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u5909\u6570\uff09\u306b\u3082\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/td><\/tr>\n<tr><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3068\u306e\u95a2\u4fc2<\/td><td>\u72ec\u7acb\u3057\u305f\u5b58\u5728<\/td><td>\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u632f\u308b\u821e\u3044\u3092\u5b9a\u7fa9\u3059\u308b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30af\u30e9\u30b9<\/strong>\uff1aJava\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u57fa\u672c\u5358\u4f4d\u3002\u30c7\u30fc\u30bf\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u3068\u51e6\u7406\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3057\u305f\u8a2d\u8a08\u56f3\u306e\u3088\u3046\u306a\u3082\u306e\u3002\u4f8b\u3048\u3070\u300cEmployee\uff08\u793e\u54e1\uff09\u30af\u30e9\u30b9\u300d\u306a\u3089\u3001\u540d\u524d\u30fb\u7d66\u4e0e\u3068\u3044\u3046\u30c7\u30fc\u30bf\u3068\u3001\u7d66\u4e0e\u8a08\u7b97\u30fb\u52e4\u6020\u7ba1\u7406\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">1-2. \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u3092\u6d3b\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u304c\u6839\u672c\u304b\u3089\u5909\u308f\u308a\u307e\u3059\u3002\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u518d\u5229\u7528\u6027\u306e\u5411\u4e0a\uff1a<\/strong>\u540c\u3058\u51e6\u7406\u3092\u4f55\u5ea6\u3067\u3082\u547c\u3073\u51fa\u305b\u308b\u3002\u30b3\u30fc\u30c9\u306e\u91cd\u8907\uff08\u30b3\u30d4\u30da\uff09\u304c\u306a\u304f\u306a\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u53ef\u8aad\u6027\u306e\u5411\u4e0a\uff1a<\/strong>\u300c\u4f55\u3092\u3057\u3066\u3044\u308b\u304b\u300d\u304c\u30e1\u30bd\u30c3\u30c9\u540d\u3067\u5206\u304b\u308b\u3002\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u3060\u3051\u3067\u51e6\u7406\u306e\u610f\u56f3\u304c\u4f1d\u308f\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a\uff1a<\/strong>\u51e6\u7406\u3092\u4fee\u6b63\u3059\u308b\u3068\u304d\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u3060\u3051\u76f4\u305b\u3070\u3044\u3044\u3002\u30b3\u30d4\u30da\u3057\u305f\u30b3\u30fc\u30c9\u3092\u5168\u7b87\u6240\u4fee\u6b63\u3059\u308b\u624b\u9593\u304c\u4e0d\u8981<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3055\uff1a<\/strong>\u30e1\u30bd\u30c3\u30c9\u5358\u4f4d\u3067\u30c6\u30b9\u30c8\u3067\u304d\u308b\u3002\u30d0\u30b0\u306e\u7279\u5b9a\u304c\u683c\u6bb5\u306b\u901f\u304f\u306a\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30c1\u30fc\u30e0\u958b\u767a\u306e\u52b9\u7387\u5316\uff1a<\/strong>\u30e1\u30bd\u30c3\u30c9\u3092\u5206\u62c5\u3057\u3066\u4f5c\u308c\u308b\u3002\u5f79\u5272\u5206\u62c5\u304c\u660e\u78ba\u306b\u306a\u308b<\/span><\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300c\u30b3\u30d4\u30da\u3057\u305f\u3089\u8ca0\u3051\u300d\u3068\u3044\u3046\u306e\u306f\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306e\u683c\u8a00\u3067\u3059\u304c\u3001\u30e1\u30bd\u30c3\u30c9\u5316\u304c\u305d\u306e\u89e3\u6c7a\u7b56\u3067\u3059\u300210\u7b87\u6240\u306b\u540c\u3058\u8a08\u7b97\u30ed\u30b8\u30c3\u30af\u3092\u66f8\u3044\u3066\u3044\u305f\u3089\u3001\u4ed5\u69d8\u5909\u66f4\u306e\u305f\u3073\u306b10\u7b87\u6240\u3092\u4fee\u6b63\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30e1\u30bd\u30c3\u30c9\u306b\u307e\u3068\u3081\u308c\u30701\u7b87\u6240\u3092\u76f4\u3059\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">1-3. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3068\u30e1\u30bd\u30c3\u30c9\u306e\u95a2\u4fc2<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3067\u306f\u3001\u73fe\u5b9f\u4e16\u754c\u306e\u300c\u30e2\u30ce\u300d\u3092\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u8868\u73fe\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u300c\u793e\u54e1\u300d\u3068\u3044\u3046\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u300c\u540d\u524d\u30fb\u7d66\u4e0e\u30fb\u90e8\u7f72\u300d\u3068\u3044\u3046\u30c7\u30fc\u30bf\u3068\u300c\u52e4\u6020\u3092\u8a18\u9332\u3059\u308b\u30fb\u7d66\u4e0e\u3092\u8a08\u7b97\u3059\u308b\u30fb\u5831\u544a\u66f8\u3092\u4f5c\u308b\u300d\u3068\u3044\u3046\u632f\u308b\u821e\u3044\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u300c\u632f\u308b\u821e\u3044\u300d\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u304c\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u8a08\u56f3\uff09\u306e\u4e2d\u306b\u66f8\u304d\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u300c\u4f55\u304c\u3067\u304d\u308b\u304b\u300d\u3092\u8868\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u30af\u30e9\u30b9<\/strong><br><span style=\"font-size:12px;\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u8a08\u56f3<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30d5\u30a3\u30fc\u30eb\u30c9<\/strong><br><span style=\"font-size:12px;\">\u30c7\u30fc\u30bf\uff08\u5909\u6570\uff09<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30e1\u30bd\u30c3\u30c9<\/strong><br><span style=\"font-size:12px;\">\u632f\u308b\u821e\u3044\uff08\u51e6\u7406\uff09<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/strong><br><span style=\"font-size:12px;\">\u8a2d\u8a08\u56f3\u304b\u3089\u4f5c\u3063\u305f\u5b9f\u4f53<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/strong>\uff1a\u30af\u30e9\u30b9\uff08\u8a2d\u8a08\u56f3\uff09\u304b\u3089\u4f5c\u3089\u308c\u305f\u5b9f\u4f53\u306e\u3053\u3068\u3002\u4f8b\u3048\u3070Employee\u30af\u30e9\u30b9\u304b\u3089\u300c\u7530\u4e2d\u3055\u3093\u300d\u300c\u5c71\u7530\u3055\u3093\u300d\u3068\u3044\u3046\u5177\u4f53\u7684\u306a\u793e\u54e1\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u306e\u300c\u7530\u4e2d\u3055\u3093\u300d\u300c\u5c71\u7530\u3055\u3093\u300d\u304c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-02\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">02<\/span>\n  <span class=\"section-label\" style=\"display:block;\">METHOD DEFINITION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30e1\u30bd\u30c3\u30c9\u306e\u5b9a\u7fa9\u65b9\u6cd5<\/span>\n  <span class=\"section-desc\">\u623b\u308a\u5024\u306e\u578b\u30fb\u30e1\u30bd\u30c3\u30c9\u540d\u30fb\u5f15\u6570\u306e\u66f8\u304d\u65b9\u3092\u5b8c\u5168\u89e3\u8aac<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u6c7a\u307e\u3063\u305f\u69cb\u6587\uff08\u6587\u6cd5\uff09\u306b\u6cbf\u3063\u3066\u66f8\u304d\u307e\u3059\u3002\u307e\u305a\u69cb\u6587\u306e\u5168\u4f53\u50cf\u3092\u628a\u63e1\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u8981\u7d20\u306e\u610f\u5473\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2-1. \u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u306e\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u5f62\u5f0f\u3067\u66f8\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">[\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50] [static] \u623b\u308a\u5024\u306e\u578b \u30e1\u30bd\u30c3\u30c9\u540d(\u5f15\u6570\u306e\u578b \u5f15\u6570\u540d, ...) {\n    \/\/ \u51e6\u7406\u5185\u5bb9\n    return \u623b\u308a\u5024; \/\/ void \u306e\u5834\u5408\u306f\u4e0d\u8981\n}<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u308c\u305e\u308c\u306e\u8981\u7d20\u3092\u5177\u4f53\u4f8b\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u6d88\u8cbb\u7a0e\u8fbc\u307f\u4fa1\u683c\u3092\u8a08\u7b97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\npublic static int calculateTaxIncludedPrice(int price, double taxRate) {\n    int taxAmount = (int)(price * taxRate);\n    return price + taxAmount;\n}<\/pre>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u8981\u7d20<\/th><th>\u4f8b<\/th><th>\u610f\u5473<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50<\/td><td>public<\/td><td>\u3069\u3053\u304b\u3089\u547c\u3073\u51fa\u305b\u308b\u304b\u3092\u6307\u5b9a\u3002public\u306f\u5168\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/td><\/tr>\n<tr><td>static<\/td><td>static<\/td><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u305a\u306b\u30af\u30e9\u30b9\u540d\u3067\u547c\u3073\u51fa\u305b\u308b\uff08\u8a73\u7d30\u306f\u7b2c8\u7ae0\uff09<\/td><\/tr>\n<tr><td>\u623b\u308a\u5024\u306e\u578b<\/td><td>int<\/td><td>\u30e1\u30bd\u30c3\u30c9\u304c\u8fd4\u3059\u5024\u306e\u578b\u3002\u5024\u3092\u8fd4\u3055\u306a\u3044\u5834\u5408\u306fvoid\u3092\u6307\u5b9a<\/td><\/tr>\n<tr><td>\u30e1\u30bd\u30c3\u30c9\u540d<\/td><td>calculateTaxIncludedPrice<\/td><td>\u51e6\u7406\u306e\u5185\u5bb9\u304c\u5206\u304b\u308b\u540d\u524d\u3002\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\uff08\u5c0f\u6587\u5b57\u59cb\u307e\u308a\uff09\u304c\u6163\u7fd2<\/td><\/tr>\n<tr><td>\u5f15\u6570<\/td><td>int price, double taxRate<\/td><td>\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u3002\u578b \u5909\u6570\u540d \u306e\u5f62\u5f0f\u3067\u6307\u5b9a<\/td><\/tr>\n<tr><td>\u51e6\u7406\u5185\u5bb9<\/td><td>{ ... }<\/td><td>\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3059\u308b\u51e6\u7406\u3092\u30d6\u30ed\u30c3\u30af\u5185\u306b\u66f8\u304f<\/td><\/tr>\n<tr><td>return\u6587<\/td><td>return price + taxAmount<\/td><td>\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u5024\u3092\u6307\u5b9a\u3002\u623b\u308a\u5024\u306e\u578b\u3068\u4e00\u81f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50<\/strong>\uff1a\u30e1\u30bd\u30c3\u30c9\u3084\u30af\u30e9\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u7bc4\u56f2\u3092\u5236\u9650\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u3002public\uff08\u5168\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\uff09\u3001private\uff08\u540c\u30af\u30e9\u30b9\u5185\u306e\u307f\uff09\u3001protected\uff08\u540c\u30af\u30e9\u30b9+\u30b5\u30d6\u30af\u30e9\u30b9+\u540c\u30d1\u30c3\u30b1\u30fc\u30b8\uff09\u3001\u6307\u5b9a\u306a\u3057\uff08\u540c\u30d1\u30c3\u30b1\u30fc\u30b8\u5185\u306e\u307f\uff09\u306e4\u7a2e\u985e\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2-2. \u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8ab0\u306b\u4f7f\u308f\u305b\u308b\u304b\u300d\u3092\u6c7a\u3081\u308b\u91cd\u8981\u306a\u8a2d\u8a08\u4e0a\u306e\u5224\u65ad\u3067\u3059\u3002\u5b9f\u52d9\u3067\u306f\u4ee5\u4e0b\u306e\u65b9\u91dd\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u4fee\u98fe\u5b50<\/th><th>\u4f7f\u3044\u3069\u3053\u308d<\/th><th>\u5b9f\u52d9\u3067\u306e\u5224\u65ad\u57fa\u6e96<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>public<\/td><td>\u5916\u90e8\u304b\u3089\u547c\u3073\u51fa\u3057\u3066\u307b\u3057\u3044\u30e1\u30bd\u30c3\u30c9<\/td><td>API\u3084\u4ed6\u30af\u30e9\u30b9\u306b\u63d0\u4f9b\u3059\u308b\u51e6\u7406\u3002\u30af\u30e9\u30b9\u306e\u300c\u7a93\u53e3\u300d\u3068\u306a\u308b\u30e1\u30bd\u30c3\u30c9<\/td><\/tr>\n<tr><td>private<\/td><td>\u30af\u30e9\u30b9\u5185\u90e8\u3060\u3051\u3067\u4f7f\u3046\u51e6\u7406<\/td><td>\u5916\u90e8\u306b\u898b\u305b\u305f\u304f\u306a\u3044\u5185\u90e8\u30ed\u30b8\u30c3\u30af\u3002\u30af\u30e9\u30b9\u306e\u8a73\u7d30\u5b9f\u88c5\u3092\u96a0\u3059<\/td><\/tr>\n<tr><td>protected<\/td><td>\u7d99\u627f\u5148\u306e\u30af\u30e9\u30b9\u3067\u3082\u4f7f\u3044\u305f\u3044\u51e6\u7406<\/td><td>\u7d99\u627f\uff08\u30b5\u30d6\u30af\u30e9\u30b9\uff09\u95a2\u4fc2\u304c\u3042\u308b\u8a2d\u8a08\u3067\u4f7f\u7528<\/td><\/tr>\n<tr><td>\uff08\u306a\u3057\uff09<\/td><td>\u540c\u3058\u30d1\u30c3\u30b1\u30fc\u30b8\u5185\u3067\u306e\u307f\u4f7f\u3046\u51e6\u7406<\/td><td>\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u8a2d\u8a08\u5358\u4f4d\u306b\u3059\u308b\u5834\u5408\u3002\u3042\u307e\u308a\u4f7f\u308f\u306a\u3044<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u306e\u539f\u5247\uff1a\u60c5\u5831\u96a0\u853d<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u5916\u90e8\u306b\u516c\u958b\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306fpublic\u3001\u5185\u90e8\u3067\u3057\u304b\u4f7f\u308f\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u306fprivate\u306b\u3059\u308b\u306e\u304c\u57fa\u672c\u539f\u5247\u3067\u3059\u3002\u300c\u3068\u308a\u3042\u3048\u305a\u5168\u90e8public\u300d\u306b\u3059\u308b\u3068\u3001\u5f8c\u304b\u3089\u5909\u66f4\u3067\u304d\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u304c\u5897\u3048\u3066\u8a2d\u8a08\u304c\u786c\u76f4\u5316\u3057\u307e\u3059\u3002<strong>\u307e\u305aprivate\u3067\u4f5c\u308a\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066public\u306b\u5909\u3048\u308b<\/strong>\u3068\u3044\u3046\u767a\u60f3\u304c\u826f\u3044\u8a2d\u8a08\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2-3. \u30e1\u30bd\u30c3\u30c9\u540d\u306e\u547d\u540d\u898f\u5247<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306e\u30e1\u30bd\u30c3\u30c9\u540d\u306b\u306f\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\uff08\u547d\u540d\u898f\u5247\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306f\u7d71\u4e00\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\uff1a<\/strong>\u6700\u521d\u306e\u5358\u8a9e\u306f\u5c0f\u6587\u5b57\u3067\u59cb\u3081\u30012\u756a\u76ee\u4ee5\u964d\u306e\u5358\u8a9e\u306e\u5148\u982d\u306f\u5927\u6587\u5b57\u306b\u3059\u308b\uff08\u4f8b\uff1acalculateTax\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u52d5\u8a5e\u59cb\u307e\u308a\u304c\u63a8\u5968\uff1a<\/strong>\u30e1\u30bd\u30c3\u30c9\u306f\u51e6\u7406\u306a\u306e\u3067\u300c\u4f55\u3092\u3059\u308b\u304b\u300d\u304c\u4f1d\u308f\u308b\u52d5\u8a5e\u3067\u59cb\u3081\u308b\uff08\u4f8b\uff1aget\u25cb\u25cb\u3001set\u25cb\u25cb\u3001calculate\u25cb\u25cb\u3001validate\u25cb\u25cb\uff09<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u5177\u4f53\u7684\u306a\u540d\u524d\u3092\u3064\u3051\u308b\uff1a<\/strong>\u300cprocess()\u300d\u300cdoSomething()\u300d\u306f\u4f55\u3092\u3059\u308b\u304b\u5206\u304b\u3089\u306a\u3044\u3002\u300cprocessPayrollCalculation()\u300d\u306e\u3088\u3046\u306b\u5177\u4f53\u7684\u306b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>Java\u306e\u4e88\u7d04\u8a9e\u306f\u4f7f\u3048\u306a\u3044\uff1a<\/strong>class\u3001if\u3001for\u3001return\u7b49\u306f\u30e1\u30bd\u30c3\u30c9\u540d\u306b\u3067\u304d\u306a\u3044<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u6570\u5b57\u306f\u5148\u982d\u306b\u4f7f\u3048\u306a\u3044\uff1a<\/strong>\u300c1calculate\u300d\u306fNG\u3002\u300ccalculate1\u300d\u306fOK\uff08\u305f\u3060\u3057\u610f\u5473\u306e\u3042\u308b\u540d\u524d\u3092\u512a\u5148\uff09<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u826f\u3044\u30e1\u30bd\u30c3\u30c9\u540d\u306e\u4f8b\npublic double calculateMonthlyPayroll(int employeeId) { ... }\npublic boolean isValidEmail(String email) { ... }\npublic List<Order> getOrdersByCustomerId(int customerId) { ... }\npublic void sendNotificationEmail(String toAddress, String subject) { ... }\n\n\/\/ \u60aa\u3044\u30e1\u30bd\u30c3\u30c9\u540d\u306e\u4f8b\uff08\u4f55\u3092\u3059\u308b\u304b\u5206\u304b\u3089\u306a\u3044\uff09\npublic void process() { ... }       \/\/ \u4f55\u3092\u51e6\u7406\uff1f\npublic int calc(int x) { ... }       \/\/ \u4f55\u3092\u8a08\u7b97\uff1f\npublic boolean check(String s) { ... } \/\/ \u4f55\u3092\u30c1\u30a7\u30c3\u30af\uff1f<\/pre>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-03\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">03<\/span>\n  <span class=\"section-label\" style=\"display:block;\">METHOD INVOCATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u65b9<\/span>\n  <span class=\"section-desc\">\u540c\u30af\u30e9\u30b9\u5185\u30fb\u5225\u30af\u30e9\u30b9\u304b\u3089\u30fbstatic\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u65b9\u3092\u89e3\u8aac<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3057\u3066\u3082\u3001\u547c\u3073\u51fa\u3055\u306a\u3051\u308c\u3070\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\u3002Java\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u65b9\u306f\u3001\u5b9a\u7fa9\u5834\u6240\u3084\u4fee\u98fe\u5b50\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u30d1\u30bf\u30fc\u30f3\u5225\u306b\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. \u540c\u3058\u30af\u30e9\u30b9\u5185\u304b\u3089\u306e\u547c\u3073\u51fa\u3057<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u3058\u30af\u30e9\u30b9\u5185\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u5834\u5408\u306f\u3001<strong>\u30e1\u30bd\u30c3\u30c9\u540d\u3068\u5f15\u6570\u3092\u66f8\u304f\u3060\u3051<\/strong>\u3067\u547c\u3073\u51fa\u305b\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class TaxCalculator {\n    \/\/ \u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\n    public int calculateTax(int price, double taxRate) {\n        return (int)(price * taxRate);\n    }\n\n    \/\/ \u540c\u3058\u30af\u30e9\u30b9\u5185\u304b\u3089\u547c\u3073\u51fa\u3059\n    public int calculateTotalPrice(int price) {\n        double taxRate = 0.1; \/\/ \u6d88\u8cbb\u7a0e10%\n        int tax = calculateTax(price, taxRate); \/\/ \u540c\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\n        return price + tax;\n    }\n}<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306a\u3089<strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u3092\u4f5c\u3089\u305a\u306b\u305d\u306e\u307e\u307e\u547c\u3079\u308b<\/strong>\u70b9\u3067\u3059\u3002\u300ccalculateTax(price, taxRate)\u300d\u3068\u66f8\u304f\u3060\u3051\u3067\u3001\u540c\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-2. \u5225\u30af\u30e9\u30b9\u304b\u3089\u306e\u547c\u3073\u51fa\u3057\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5225\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u5834\u5408\u306f\u3001<strong>\u307e\u305a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff09\u3092\u4f5c\u6210\u3057\u3066\u304b\u3089\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7d4c\u7531\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059<\/strong>\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u5225\u306e\u30af\u30e9\u30b9\u304b\u3089TaxCalculator\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\npublic class OrderProcessor {\n    public void processOrder(int itemPrice) {\n        \/\/ TaxCalculator\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\n        TaxCalculator calculator = new TaxCalculator();\n\n        \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7d4c\u7531\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\n        int totalPrice = calculator.calculateTotalPrice(itemPrice);\n\n        System.out.println(\"\u5408\u8a08\u91d1\u984d\uff08\u7a0e\u8fbc\uff09: \" + totalPrice + \"\u5186\");\n    }\n}<\/pre>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<br>\u3092\u4f5c\u6210<\/strong><br><span style=\"font-size:12px;\">TaxCalculator calc<br>= new TaxCalculator()<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9.\u30e1\u30bd\u30c3\u30c9\u540d()<br>\u3067\u547c\u3073\u51fa\u3059<\/strong><br><span style=\"font-size:12px;\">calc.calculateTotalPrice<br>(itemPrice)<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b<\/strong><br><span style=\"font-size:12px;\">\u623b\u308a\u5024\u304c\u3042\u308c\u3070<br>\u5909\u6570\u306b\u53d7\u3051\u53d6\u308b<\/span><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3-3. main\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u306e\u547c\u3073\u51fa\u3057<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\uff08\u8d77\u52d5\u70b9\uff09\u306f<strong>main\u30e1\u30bd\u30c3\u30c9<\/strong>\u3067\u3059\u3002main\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u69cb\u6210\u3059\u308b\u306e\u304c\u57fa\u672c\u7684\u306a\u6d41\u308c\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class Main {\n    public static void main(String[] args) {\n        \/\/ \u6ce8\u6587\u51e6\u7406\u3092\u958b\u59cb\n        OrderProcessor processor = new OrderProcessor();\n        processor.processOrder(10000); \/\/ 10,000\u5186\u306e\u5546\u54c1\u3092\u51e6\u7406\n\n        \/\/ \u51fa\u529b: \u5408\u8a08\u91d1\u984d\uff08\u7a0e\u8fbc\uff09: 11000\u5186\n    }\n}<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">main\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305astatic\u306b\u3059\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">main\u30e1\u30bd\u30c3\u30c9\u306f\u300cpublic static void main(String[] args)\u300d\u3068\u3044\u3046\u5f62\u5f0f\u304c\u5fc5\u9808\u3067\u3059\u3002static\u304c\u3064\u3044\u3066\u3044\u308b\u306e\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u8d77\u52d5\u6642\u306b\u306f\u307e\u3060\u3069\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3082\u5b58\u5728\u3057\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306a\u3057\u3067\u5b9f\u884c\u3067\u304d\u308bstatic\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">main\u30e1\u30bd\u30c3\u30c9\u3092\u300c\u5de5\u5834\u306e\u7ba1\u7406\u8005\u300d\u3068\u8003\u3048\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002\u5de5\u5834\uff08\u30d7\u30ed\u30b0\u30e9\u30e0\uff09\u304c\u52d5\u304d\u59cb\u3081\u308b\u3068\u3001\u307e\u305a\u7ba1\u7406\u8005\uff08main\uff09\u304c\u8d77\u52d5\u3057\u3001\u305d\u3053\u304b\u3089\u5404\u90e8\u7f72\uff08\u30af\u30e9\u30b9\uff09\u306e\u62c5\u5f53\u8005\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff09\u3092\u4f5c\u3063\u3066\u4ed5\u4e8b\u3092\u4f9d\u983c\uff08\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\uff09\u3059\u308b\u3001\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-04\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">04<\/span>\n  <span class=\"section-label\" style=\"display:block;\">ARGUMENTS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u5f15\u6570\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">\u5358\u4e00\u5f15\u6570\u30fb\u8907\u6570\u5f15\u6570\u30fb\u53ef\u5909\u9577\u5f15\u6570\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u4f7f\u3044\u5206\u3051<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f15\u6570\uff08\u3072\u304d\u3059\u3046\uff09\u306f\u3001<strong>\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u306e\u3053\u3068<\/strong>\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u3092\u300c\u51e6\u7406\u306e\u6a5f\u68b0\u300d\u3068\u3059\u308c\u3070\u3001\u5f15\u6570\u306f\u300c\u6a5f\u68b0\u306b\u6295\u5165\u3059\u308b\u6750\u6599\u300d\u3067\u3059\u3002\u6750\u6599\u306b\u3088\u3063\u3066\u51e6\u7406\u306e\u7d50\u679c\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u5f15\u6570\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\uff09<\/strong>\uff1a\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u306e\u3053\u3068\u3002\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u306e\u62ec\u5f27\u5185\u306b\u300c\u578b \u5909\u6570\u540d\u300d\u306e\u5f62\u5f0f\u3067\u66f8\u304f\u3002\u547c\u3073\u51fa\u3057\u6642\u306b\u6e21\u3059\u5024\u3092\u300c\u5b9f\u5f15\u6570\u300d\u3001\u5b9a\u7fa9\u6642\u306e\u5909\u6570\u540d\u3092\u300c\u4eee\u5f15\u6570\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u300d\u3068\u547c\u3073\u5206\u3051\u308b\u3053\u3068\u3082\u3042\u308b\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4-1. \u5358\u4e00\u5f15\u6570\u306e\u30e1\u30bd\u30c3\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u5f15\u6570\u304c1\u3064\u306e\u5834\u5408\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u793e\u54e1ID\u3092\u53d7\u3051\u53d6\u3063\u3066\u793e\u54e1\u540d\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\npublic String getEmployeeName(int employeeId) {\n    \/\/ employeeId\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08\u3092\u60f3\u5b9a\u3057\u305f\u51e6\u7406\uff09\u304b\u3089\u540d\u524d\u3092\u53d6\u5f97\n    if (employeeId == 1001) return \"\u7530\u4e2d \u82b1\u5b50\";\n    if (employeeId == 1002) return \"\u5c71\u7530 \u6b21\u90ce\";\n    return \"\u4e0d\u660e\";\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\nString name = getEmployeeName(1001); \/\/ \u2192 \u7530\u4e2d \u82b1\u5b50<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4-2. \u8907\u6570\u5f15\u6570\u306e\u30e1\u30bd\u30c3\u30c9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f15\u6570\u306f\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u8907\u6570\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u5f15\u6570\u306e<strong>\u9806\u5e8f\u3068\u578b\u3092\u4e00\u81f4\u3055\u305b\u308b<\/strong>\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u57fa\u672c\u7d66\u30fb\u6b8b\u696d\u6642\u9593\u30fb\u5358\u4fa1\u304b\u3089\u6b8b\u696d\u4ee3\u8fbc\u307f\u7d66\u4e0e\u3092\u8a08\u7b97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\npublic int calculateSalary(int baseSalary, double overtimeHours, int overtimeRate) {\n    int overtimePay = (int)(overtimeHours * overtimeRate);\n    return baseSalary + overtimePay;\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\uff08\u5f15\u6570\u306e\u9806\u5e8f\u3092\u9593\u9055\u3048\u306a\u3044\u3053\u3068\uff01\uff09\nint salary = calculateSalary(300000, 10.5, 2500);\n\/\/ \u57fa\u672c\u7d66300,000\u5186 + \u6b8b\u696d10.5\u6642\u9593 \u00d7 \u5358\u4fa12,500\u5186 = 326,250\u5186<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">\u5f15\u6570\u306e\u9806\u5e8f\u3068\u578b\u3092\u9593\u9055\u3048\u308b\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">Java\u306f\u578b\u30c1\u30a7\u30c3\u30af\u304c\u53b3\u683c\u3067\u3059\u3002\u5b9a\u7fa9\u3067\u300cint baseSalary, double overtimeHours\u300d\u3068\u3044\u3046\u9806\u756a\u306a\u3089\u3001\u547c\u3073\u51fa\u3057\u6642\u3082\u540c\u3058\u9806\u756a\u30fb\u540c\u3058\u578b\u3067\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u578b\u304c\u5408\u308f\u306a\u3044\u5834\u5408\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u5f15\u6570\u304c\u591a\u3044\u5834\u5408\u306f\u3001\u5c02\u7528\u306e\u30af\u30e9\u30b9\uff08DTO\u3084Value Object\uff09\u3092\u4f5c\u308b\u8a2d\u8a08\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4-3. \u53ef\u5909\u9577\u5f15\u6570\uff08varargs\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f15\u6570\u306e\u6570\u304c\u4e8b\u524d\u306b\u5206\u304b\u3089\u306a\u3044\u5834\u5408\u3001<strong>\u53ef\u5909\u9577\u5f15\u6570\uff08varargs\uff09<\/strong>\u3092\u4f7f\u3044\u307e\u3059\u3002\u578b\u306e\u5f8c\u306b\u300c...\u300d\u3092\u3064\u3051\u308b\u3060\u3051\u3067\u3001\u4efb\u610f\u306e\u6570\u306e\u5f15\u6570\u3092\u53d7\u3051\u53d6\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u4efb\u610f\u306e\u6570\u306e\u58f2\u4e0a\u91d1\u984d\u3092\u53d7\u3051\u53d6\u3063\u3066\u5408\u8a08\u3092\u8a08\u7b97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\npublic int calculateTotalSales(int... salesAmounts) {\n    int total = 0;\n    for (int amount : salesAmounts) {\n        total += amount;\n    }\n    return total;\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\uff08\u5f15\u6570\u306e\u6570\u304c\u5909\u308f\u3063\u3066\u3082\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u3067\u5bfe\u5fdc\uff09\nint total1 = calculateTotalSales(10000, 20000, 30000);       \/\/ 3\u4ef6\nint total2 = calculateTotalSales(5000, 8000, 12000, 15000);  \/\/ 4\u4ef6\nint total3 = calculateTotalSales(50000);                      \/\/ 1\u4ef6<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u53ef\u5909\u9577\u5f15\u6570\u306e\u6ce8\u610f\u70b9<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u53ef\u5909\u9577\u5f15\u6570\u306f\u5fc5\u305a<strong>\u5f15\u6570\u30ea\u30b9\u30c8\u306e\u6700\u5f8c\u306b1\u3064\u3060\u3051<\/strong>\u66f8\u3051\u307e\u3059\u3002\u300cint... amounts, String label\u300d\u306e\u3088\u3046\u306b\u53ef\u5909\u9577\u5f15\u6570\u306e\u5f8c\u306b\u5225\u306e\u5f15\u6570\u3092\u66f8\u304f\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u901a\u5e38\u306e\u914d\u5217\uff08int[]\uff09\u3082\u6e21\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u5f15\u6570\u8a2d\u8a08\u306f\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u3084\u3059\u3055\u3092\u6c7a\u3081\u308b\u91cd\u8981\u306a\u90e8\u5206\u3067\u3059\u3002\u5f15\u6570\u304c\u591a\u3059\u304e\u308b\u3068\u300c\u3069\u308c\u3092\u6e21\u305b\u3070\u3044\u3044\u304b\u5206\u304b\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u554f\u984c\u304c\u8d77\u304d\u307e\u3059\u3002\u76ee\u5b89\u3068\u3057\u3066\u3001\u5f15\u6570\u304c4\u3064\u4ee5\u4e0a\u306b\u306a\u3063\u305f\u3089\u3001\u5c02\u7528\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30af\u30e9\u30b9\uff09\u3092\u4f5c\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-05\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">05<\/span>\n  <span class=\"section-label\" style=\"display:block;\">RETURN VALUES<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u623b\u308a\u5024\u3068return\u6587\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u5024\u3092\u8fd4\u3059\u4ed5\u7d44\u307f\u3068\u5b9f\u52d9\u3067\u306e\u4f7f\u3044\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u306f\u51e6\u7406\u3057\u305f\u7d50\u679c\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u300c\u8fd4\u3059\u5024\u300d\u304c\u623b\u308a\u5024\u3067\u3059\u3002return\u6587\u3092\u4f7f\u3063\u3066\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5-1. return\u6587\u306e\u57fa\u672c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">return\u6587\u306f\u300c\u3053\u306e\u5024\u3092\u8fd4\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u7d42\u4e86\u3059\u308b\u300d\u3068\u3044\u3046\u547d\u4ee4\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u5272\u5f15\u5f8c\u306e\u4fa1\u683c\u3092\u8a08\u7b97\u3057\u3066\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\npublic double applyDiscount(int originalPrice, double discountRate) {\n    if (discountRate < 0 || discountRate > 1) {\n        \/\/ \u4e0d\u6b63\u306a\u5272\u5f15\u7387\u306e\u5834\u5408\u306f\u5143\u306e\u4fa1\u683c\u3092\u8fd4\u3059\uff08\u65e9\u671freturn\uff09\n        return originalPrice;\n    }\n    double discountedPrice = originalPrice * (1 - discountRate);\n    return discountedPrice; \/\/ \u5272\u5f15\u5f8c\u306e\u4fa1\u683c\u3092\u8fd4\u3059\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\ndouble price = applyDiscount(10000, 0.2); \/\/ \u2192 8000.0\uff0820%\u5f15\u304d\uff09<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">5-2. \u3055\u307e\u3056\u307e\u306a\u623b\u308a\u5024\u306e\u578b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u623b\u308a\u5024\u306e\u578b\u306fJava\u306e\u3059\u3079\u3066\u306e\u578b\u304c\u4f7f\u3048\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u578b\u304b\u3089\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u307e\u3067\u5e45\u5e83\u304f\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u623b\u308a\u5024\u306e\u578b<\/th><th>\u7528\u9014<\/th><th>\u30b3\u30fc\u30c9\u4f8b<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>int<\/td><td>\u6574\u6570\u5024\uff08\u500b\u6570\u30fb\u91d1\u984d\u30fbID\u7b49\uff09<\/td><td>public int getEmployeeCount() { return 50; }<\/td><\/tr>\n<tr><td>double<\/td><td>\u5c0f\u6570\u5024\uff08\u5272\u5408\u30fb\u5e73\u5747\u30fb\u8a08\u7b97\u7d50\u679c\uff09<\/td><td>public double getAverageSalary() { return 350000.5; }<\/td><\/tr>\n<tr><td>String<\/td><td>\u6587\u5b57\u5217\uff08\u540d\u524d\u30fb\u30e1\u30c3\u30bb\u30fc\u30b8\u7b49\uff09<\/td><td>public String getStatusLabel() { return \"\u627f\u8a8d\u6e08\u307f\"; }<\/td><\/tr>\n<tr><td>boolean<\/td><td>\u771f\u507d\u5024\uff08\u25cb\u304b\u00d7\u304b\u30fb\u5b58\u5728\u78ba\u8a8d\u7b49\uff09<\/td><td>public boolean isVip(int customerId) { return customerId < 100; }<\/td><\/tr>\n<tr><td>List&lt;T&gt;<\/td><td>\u30ea\u30b9\u30c8\uff08\u8907\u6570\u306e\u7d50\u679c\uff09<\/td><td>public List&lt;Order&gt; getOrders() { return orderList; }<\/td><\/tr>\n<tr><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b<\/td><td>\u8907\u5408\u30c7\u30fc\u30bf<\/td><td>public Employee getEmployee(int id) { return employee; }<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 class=\"wp-block-heading\">5-3. \u8907\u6570\u306ereturn\u6587\uff08\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u5185\u306b\u8907\u6570\u306ereturn\u6587\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6761\u4ef6\u306b\u3088\u3063\u3066\u65e9\u3081\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u7d42\u4e86\u3059\u308b\u300c\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\uff08Early Return\uff09\u300d\u3068\u3044\u3046\u30d1\u30bf\u30fc\u30f3\u304c\u7279\u306b\u5b9f\u52d9\u3067\u591a\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u53d7\u6ce8\u51e6\u7406\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\uff08\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u306e\u4f8b\uff09\npublic String validateOrder(int quantity, int stock, double unitPrice) {\n    \/\/ \u6570\u91cf\u30c1\u30a7\u30c3\u30af\n    if (quantity <= 0) {\n        return \"\u30a8\u30e9\u30fc: \u6ce8\u6587\u6570\u91cf\u306f1\u4ee5\u4e0a\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\";\n    }\n\n    \/\/ \u5728\u5eab\u30c1\u30a7\u30c3\u30af\n    if (quantity > stock) {\n        return \"\u30a8\u30e9\u30fc: \u5728\u5eab\u4e0d\u8db3\u3067\u3059\uff08\u5728\u5eab\u6570: \" + stock + \"\uff09\";\n    }\n\n    \/\/ \u5358\u4fa1\u30c1\u30a7\u30c3\u30af\n    if (unitPrice <= 0) {\n        return \"\u30a8\u30e9\u30fc: \u5358\u4fa1\u304c\u4e0d\u6b63\u3067\u3059\";\n    }\n\n    \/\/ \u5168\u30c1\u30a7\u30c3\u30af\u3092\u901a\u904e\n    return \"OK\";\n}<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3067\u30cd\u30b9\u30c8\u3092\u6e1b\u3089\u3059<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300cif(\u6761\u4ef6A){ if(\u6761\u4ef6B){ if(\u6761\u4ef6C){ ... }}}\u300d\u306e\u3088\u3046\u306a\u30cd\u30b9\u30c8\u304c\u6df1\u3044\u30b3\u30fc\u30c9\u306f\u8aad\u307f\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002<strong>\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u3092\u4f7f\u3046\u3068\u6761\u4ef6\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u306b\u5148\u306b\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d<\/strong>\u3001\u30cd\u30b9\u30c8\u304c\u6d45\u304f\u306a\u3063\u3066\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u73fe\u4ee3\u306eJava\u958b\u767a\u3067\u306f\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u304c\u5f37\u304f\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u65e9\u671f\u30ea\u30bf\u30fc\u30f3\u306f\u300c\u30a8\u30e9\u30fc\u6761\u4ef6\u3092\u5148\u306b\u51e6\u7406\u3057\u3066\u3001\u6b63\u5e38\u7cfb\u306f\u4e00\u756a\u4e0b\u306b\u66f8\u304f\u300d\u3068\u3044\u3046\u30b9\u30bf\u30a4\u30eb\u3067\u3059\u3002\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u3092\u5148\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u6b63\u5e38\u306a\u51e6\u7406\u304c\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306b\u66f8\u3051\u307e\u3059\u3002\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u3082\u8a55\u4fa1\u3055\u308c\u3084\u3059\u3044\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-06\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">06<\/span>\n  <span class=\"section-label\" style=\"display:block;\">VOID METHODS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">void\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">\u623b\u308a\u5024\u306a\u3057\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u6d3b\u8e8d\u3059\u308b\u5834\u9762\u3068\u66f8\u304d\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u5024\u3092\u8fd4\u3059\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u51e6\u7406\u3060\u3051\u3057\u3066\u7d50\u679c\u3092\u8fd4\u3055\u306a\u3044\u5834\u5408\u306f\u3001\u623b\u308a\u5024\u306e\u578b\u306b<strong>void\uff08\u30dc\u30a4\u30c9\uff09<\/strong>\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>void<\/strong>\uff1a\u300c\u7a7a\u30fb\u4f55\u3082\u306a\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3002\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u578b\u306bvoid\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u5024\u3092\u8fd4\u3055\u306a\u3044\uff08return\u6587\u3092\u66f8\u304b\u306a\u304f\u3066\u3088\u3044\uff09\u3002\u30ed\u30b0\u51fa\u529b\u3001\u753b\u9762\u8868\u793a\u3001\u30c7\u30fc\u30bf\u4fdd\u5b58\u306a\u3069\u300c\u526f\u4f5c\u7528\u300d\u3092\u76ee\u7684\u3068\u3057\u305f\u51e6\u7406\u306b\u4f7f\u3046\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. void\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class OrderLogger {\n    \/\/ \u30ed\u30b0\u3092\u8a18\u9332\u3059\u308b\u3060\u3051\u3067\u5024\u306f\u8fd4\u3055\u306a\u3044\n    public void logOrder(int orderId, String customerName, int amount) {\n        String log = \"[\" + java.time.LocalDateTime.now() + \"] \" +\n                     \"\u6ce8\u6587ID: \" + orderId +\n                     \" \u9867\u5ba2: \" + customerName +\n                     \" \u91d1\u984d: \" + amount + \"\u5186\";\n        System.out.println(log);\n        \/\/ return\u6587\u306f\u4e0d\u8981\uff08\u66f8\u3044\u3066\u3082\u826f\u3044\u304c\u5024\u306f\u66f8\u3051\u306a\u3044\uff09\n    }\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\uff08\u623b\u308a\u5024\u3092\u53d7\u3051\u53d6\u308b\u5909\u6570\u306f\u4e0d\u8981\uff09\nOrderLogger logger = new OrderLogger();\nlogger.logOrder(1001, \"\u7530\u4e2d\u82b1\u5b50\", 55000);<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-2. void\u30e1\u30bd\u30c3\u30c9\u304c\u5411\u304f\u51e6\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">void\u30e1\u30bd\u30c3\u30c9\u306f\u300c\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u305d\u306e\u3082\u306e\u304c\u76ee\u7684\u300d\u306e\u5834\u9762\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u30fb\u66f4\u65b0\uff1a<\/strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u66f8\u304d\u8fbc\u3080\u51e6\u7406\u3002\u51e6\u7406\u3067\u304d\u305f\u304b\u306fException\uff08\u4f8b\u5916\uff09\u3067\u901a\u77e5\u3059\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30ed\u30b0\u306e\u51fa\u529b\uff1a<\/strong>\u51e6\u7406\u306e\u8a18\u9332\u3092\u6b8b\u3059\u3002\u8fd4\u3059\u5024\u304c\u306a\u3044<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u753b\u9762\u30fbUI\u306e\u66f4\u65b0\uff1a<\/strong>\u8868\u793a\u3092\u66f4\u65b0\u3059\u308b\u3002\u7d50\u679c\u3088\u308a\u300c\u5b9f\u884c\u3057\u305f\u3053\u3068\u300d\u304c\u91cd\u8981<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e1\u30fc\u30eb\u3084\u901a\u77e5\u306e\u9001\u4fe1\uff1a<\/strong>\u9001\u4fe1\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3060\u3051\u3002\u6210\u5426\u306fException\u3067\u7ba1\u7406<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u521d\u671f\u5316\u51e6\u7406\uff1a<\/strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u8a2d\u5b9a\u3002\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u88dc\u52a9\u306b\u4f7f\u3046<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u53d7\u6ce8\u30c7\u30fc\u30bf\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3059\u308b\u30e1\u30bd\u30c3\u30c9\uff08void\u306e\u4f8b\uff09\npublic void saveOrder(Order order) {\n    \/\/ DB\u3078\u306e\u4fdd\u5b58\u51e6\u7406\uff08\u5931\u6557\u3059\u308b\u3068Exception\u304c\u30b9\u30ed\u30fc\u3055\u308c\u308b\uff09\n    orderRepository.save(order);\n\n    \/\/ \u4fdd\u5b58\u6210\u529f\u306a\u3089\u30ed\u30b0\u51fa\u529b\n    logOrder(order.getId(), order.getCustomerName(), order.getTotalAmount());\n}<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">void\u30e1\u30bd\u30c3\u30c9\u306e\u6210\u5426\u306fException\u3067\u8868\u3059<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">void\u30e1\u30bd\u30c3\u30c9\u306f\u5024\u3092\u8fd4\u3055\u306a\u3044\u305f\u3081\u3001\u300c\u51e6\u7406\u304c\u6210\u529f\u3057\u305f\u304b\u5931\u6557\u3057\u305f\u304b\u300d\u3092boolean\u623b\u308a\u5024\u3067\u8fd4\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b\u3001\u5931\u6557\u6642\u306b\u306fException\uff08\u4f8b\u5916\uff09\u3092\u30b9\u30ed\u30fc\u3057\u3066\u547c\u3073\u51fa\u3057\u5143\u306b\u901a\u77e5\u3057\u307e\u3059\u3002\u3053\u308c\u304cJava\u306e\u6a19\u6e96\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-07\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">07<\/span>\n  <span class=\"section-label\" style=\"display:block;\">OVERLOADING<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff08\u540c\u540d\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u5b9a\u7fa9\uff09<\/span>\n  <span class=\"section-desc\">\u5f15\u6570\u306e\u9055\u3044\u3067\u540c\u3058\u540d\u524d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u3067\u306f\u3001<strong>\u540c\u3058\u540d\u524d\u3067\u3082\u5f15\u6570\u306e\u578b\u30fb\u500b\u6570\u30fb\u9806\u5e8f\u304c\u9055\u3048\u3070\u3001\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059<\/strong>\u3002\u3053\u308c\u3092\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff08\u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff09\u3068\u8a00\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9<\/strong>\uff1a\u540c\u3058\u30af\u30e9\u30b9\u5185\u306b\u540c\u540d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3002\u300c\u5f15\u6570\u306e\u578b\u30fb\u500b\u6570\u30fb\u9806\u5e8f\u300d\u306e\u5c11\u306a\u304f\u3068\u30821\u3064\u304c\u9055\u3048\u3070\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u3057\u3066\u8a8d\u8b58\u3055\u308c\u308b\u3002\u623b\u308a\u5024\u306e\u578b\u3060\u3051\u304c\u9055\u3046\u5834\u5408\u306f\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u306a\u3089\u306a\u3044\uff08\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff09\u3002<\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u57fa\u672c\u4f8b<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class TaxCalculator {\n    \/\/ \u30d1\u30bf\u30fc\u30f31: \u91d1\u984d\u306e\u307f\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u7a0e\u738710%\u3092\u9069\u7528\uff09\n    public int calculateTax(int price) {\n        return (int)(price * 0.1);\n    }\n\n    \/\/ \u30d1\u30bf\u30fc\u30f32: \u91d1\u984d\u3068\u7a0e\u7387\u3092\u6307\u5b9a\n    public int calculateTax(int price, double taxRate) {\n        return (int)(price * taxRate);\n    }\n\n    \/\/ \u30d1\u30bf\u30fc\u30f33: \u91d1\u984d\u3068\u7a0e\u7a2e\u5225\uff08\u6587\u5b57\u5217\u3067\u6307\u5b9a\uff09\n    public int calculateTax(int price, String taxType) {\n        double rate = \"reduced\".equals(taxType) ? 0.08 : 0.1; \/\/ \u8efd\u6e1b\u7a0e\u7387\u5bfe\u5fdc\n        return (int)(price * rate);\n    }\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\uff08\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u540d\u3067\u7570\u306a\u308b\u4f7f\u3044\u65b9\u304c\u3067\u304d\u308b\uff09\nTaxCalculator calc = new TaxCalculator();\nint tax1 = calc.calculateTax(10000);           \/\/ \u2192 1000\nint tax2 = calc.calculateTax(10000, 0.08);    \/\/ \u2192 800\nint tax3 = calc.calculateTax(10000, \"reduced\"); \/\/ \u2192 800<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-2. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<table>\n<thead><tr><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u6ce8\u610f\u70b9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u4f7f\u3046\u5074\u304c\u300c\u5834\u5408\u306b\u3088\u3063\u3066\u540d\u524d\u3092\u5909\u3048\u306a\u304f\u3066\u3044\u3044\u300d\u305f\u3081\u76f4\u611f\u7684<\/td><td>\u5f15\u6570\u306e\u578b\u304c\u4f3c\u3066\u3044\u308b\u3068\u9593\u9055\u3048\u3084\u3059\u3044\uff08\u4f8b\uff1aint\u3068long\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff09<\/td><\/tr>\n<tr><td>\u540c\u3058\u6982\u5ff5\u306e\u51e6\u7406\u3092\u307e\u3068\u3081\u3089\u308c\u308b\uff08calculateTax\u3068\u3044\u3046\u7d71\u4e00\u3057\u305f\u540d\u524d\uff09<\/td><td>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u304c\u5897\u3048\u3059\u304e\u308b\u3068\u7ba1\u7406\u304c\u8907\u96d1\u306b\u306a\u308b<\/td><\/tr>\n<tr><td>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6301\u3064\u30d0\u30ea\u30a2\u30f3\u30c8\uff08\u5f15\u6570\u306a\u3057\u7248\uff09\u3092\u4f5c\u308c\u308b<\/td><td>\u623b\u308a\u5024\u306e\u578b\u3060\u3051\u304c\u9055\u3046\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u4f5c\u308c\u306a\u3044\uff08\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306fJava\u306eAPI\u3067\u3082\u591a\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070System.out.println()\u306f\u3001int\u30fbdouble\u30fbString\u30fbboolean\u7b49\u3001\u4f55\u306e\u578b\u3092\u6e21\u3057\u3066\u3082\u304d\u3061\u3093\u3068\u8868\u793a\u3067\u304d\u307e\u3059\u304c\u3001\u3053\u308c\u3082\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3067\u5b9f\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u3002Java\u306e\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u3044\u308c\u3070\u3001\u77e5\u3089\u305a\u77e5\u3089\u305a\u306e\u3046\u3061\u306b\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u6069\u6075\u3092\u53d7\u3051\u3066\u3044\u308b\u308f\u3051\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-3. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306e\u9055\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u540d\u524d\u304c\u4f3c\u305f\u300c\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u300d\u3068\u3044\u3046\u6982\u5ff5\u3082\u3042\u308a\u307e\u3059\u3002\u6df7\u540c\u3057\u3084\u3059\u3044\u306e\u3067\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u9805\u76ee<\/th><th>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9<\/th><th>\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u610f\u5473<\/td><td>\u540c\u540d\u30e1\u30bd\u30c3\u30c9\u3092\u5f15\u6570\u9055\u3044\u3067\u8907\u6570\u5b9a\u7fa9<\/td><td>\u7d99\u627f\uff08\u30b5\u30d6\u30af\u30e9\u30b9\uff09\u3067\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4e0a\u66f8\u304d<\/td><\/tr>\n<tr><td>\u5834\u6240<\/td><td>\u540c\u3058\u30af\u30e9\u30b9\u5185<\/td><td>\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u9593<\/td><\/tr>\n<tr><td>\u5f15\u6570<\/td><td>\u7570\u306a\u308b\uff08\u5fc5\u9808\uff09<\/td><td>\u540c\u3058\uff08\u5fc5\u9808\uff09<\/td><\/tr>\n<tr><td>\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3<\/td><td>\u306a\u3057<\/td><td>@Override\uff08\u63a8\u5968\uff09<\/td><\/tr>\n<tr><td>\u7528\u9014<\/td><td>\u4f7f\u3044\u52dd\u624b\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u63d0\u4f9b<\/td><td>\u52d5\u4f5c\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\uff08\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-08\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">08<\/span>\n  <span class=\"section-label\" style=\"display:block;\">STATIC METHODS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">static\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4e0d\u8981\u3067\u547c\u3079\u308b\u30e1\u30bd\u30c3\u30c9\u306e\u7279\u5fb4\u3068\u4f7f\u3044\u6240<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">static\u30e1\u30bd\u30c3\u30c9\u306f\u3001<strong>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u306a\u304f\u3066\u3082\u3001\u30af\u30e9\u30b9\u540d\u304b\u3089\u76f4\u63a5\u547c\u3073\u51fa\u305b\u308b\u30e1\u30bd\u30c3\u30c9<\/strong>\u3067\u3059\u3002\u300cMath.random()\u300d\u3084\u300cInteger.parseInt()\u300d\u306e\u3088\u3046\u306aJava\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u3001\u591a\u304f\u304cstatic\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8-1. static\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class MathUtils {\n    \/\/ static\u30e1\u30bd\u30c3\u30c9\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4e0d\u8981\u3067\u547c\u3079\u308b\uff09\n    public static int square(int n) {\n        return n * n;\n    }\n\n    public static double roundToDecimalPlace(double value, int places) {\n        double factor = Math.pow(10, places);\n        return Math.round(value * factor) \/ factor;\n    }\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u305a\u30af\u30e9\u30b9\u540d\u3067\u76f4\u63a5\u547c\u3076\uff09\nint sq = MathUtils.square(5);           \/\/ \u2192 25\ndouble rounded = MathUtils.roundToDecimalPlace(3.14159, 2); \/\/ \u2192 3.14<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">8-2. static\u30e1\u30bd\u30c3\u30c9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n\n\n\n<table>\n<thead><tr><th>\u89b3\u70b9<\/th><th>static\u30e1\u30bd\u30c3\u30c9<\/th><th>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u547c\u3073\u51fa\u3057\u65b9<\/td><td>\u30af\u30e9\u30b9\u540d.\u30e1\u30bd\u30c3\u30c9\u540d()<\/td><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9.\u30e1\u30bd\u30c3\u30c9\u540d()<\/td><\/tr>\n<tr><td>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306e\u30a2\u30af\u30bb\u30b9<\/td><td>\u4e0d\u53ef\uff08static\u5909\u6570\u306e\u307f\uff09<\/td><td>\u53ef\u80fd<\/td><\/tr>\n<tr><td>\u5411\u3044\u3066\u3044\u308b\u51e6\u7406<\/td><td>\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30fb\u5909\u63db\u30fb\u8a08\u7b97\uff08\u5165\u529b\u2192\u51fa\u529b\u304c\u6c7a\u307e\u308b\u3082\u306e\uff09<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u306b\u5fdc\u3058\u3066\u52d5\u4f5c\u304c\u5909\u308f\u308b\u51e6\u7406<\/td><\/tr>\n<tr><td>\u5178\u578b\u4f8b<\/td><td>Math.abs()\u3001Integer.parseInt()\u3001Collections.sort()<\/td><td>employee.getSalary()\u3001order.calculateTotal()<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ static\u30e1\u30bd\u30c3\u30c9\u304c\u5411\u304f\u4f8b\uff1a\u6c4e\u7528\u7684\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\npublic class StringUtils {\n    \/\/ \u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3082\u95a2\u4fc2\u306a\u3044\u3001\u6c4e\u7528\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406\n    public static String toFullWidth(String text) {\n        \/\/ \u534a\u89d2\u2192\u5168\u89d2\u5909\u63db\u51e6\u7406\n        return text; \/\/ \uff08\u5b9f\u88c5\u7701\u7565\uff09\n    }\n\n    public static boolean isNumeric(String str) {\n        if (str == null || str.isEmpty()) return false;\n        for (char c : str.toCharArray()) {\n            if (!Character.isDigit(c)) return false;\n        }\n        return true;\n    }\n}\n\n\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306a\u3057\u3067\u4f7f\u3048\u308b\nboolean result = StringUtils.isNumeric(\"12345\"); \/\/ \u2192 true<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">static\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u3059\u304e\u306a\u3044<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u306a\u304f\u3066\u3044\u3044\u306a\u3089\u5168\u90e8static\u306b\u3057\u3088\u3046\u300d\u3068\u601d\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u305d\u308c\u306f\u8aa4\u308a\u3067\u3059\u3002static\u306b\u3059\u308b\u3068<strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u4f7f\u3048\u305a\u3001\u30c6\u30b9\u30c8\u3067\u30e2\u30c3\u30af\uff08\u4ee3\u66ff\uff09\u306b\u5dee\u3057\u66ff\u3048\u3089\u308c\u306a\u304f<\/strong>\u306a\u308a\u307e\u3059\u3002\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u306e\u6c4e\u7528\u7684\u306a\u51e6\u7406\u306b\u306fstatic\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u306b\u4f9d\u5b58\u3059\u308b\u51e6\u7406\u306b\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u306e\u304c\u6b63\u3057\u3044\u8a2d\u8a08\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300cstatic\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u3064\u4f7f\u3046\u304b\u300d\u306e\u5224\u65ad\u57fa\u6e96\u3068\u3057\u3066\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u3092\u4f7f\u3046\u304b\uff1f\u300d\u3092\u554f\u3044\u304b\u3051\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u4f7f\u308f\u306a\u3044\u306a\u3089 static\u306b\u3067\u304d\u308b\u5019\u88dc\u3067\u3059\u3002\u4f7f\u3046\u306a\u3089\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-09\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">09<\/span>\n  <span class=\"section-label\" style=\"display:block;\">METHOD CHAINING<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6d3b\u7528<\/span>\n  <span class=\"section-desc\">\u9023\u7d9a\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u30921\u884c\u306b\u307e\u3068\u3081\u308b\u6280\u6cd5<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306f\u3001<strong>\u8907\u6570\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u300c.\u300d\u3067\u3064\u306a\u304e\u3001\u4e00\u9023\u306e\u51e6\u7406\u30921\u884c\u3067\u8a18\u8ff0\u3059\u308b<\/strong>\u66f8\u304d\u65b9\u3067\u3059\u3002StringBuilder\u3001Stream API\u3001\u591a\u304f\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u5b9f\u8df5\u7684\u306a\u6280\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9-1. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u57fa\u672c\u6982\u5ff5<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306a\u3057\uff08\u5197\u9577\u306a\u66f8\u304d\u65b9\uff09\nStringBuilder sb = new StringBuilder();\nsb.append(\"\u3053\u3093\u306b\u3061\u306f\");\nsb.append(\"\u3001\");\nsb.append(\"\u7530\u4e2d\u3055\u3093\");\nsb.append(\"\uff01\");\nString message = sb.toString();\n\n\/\/ \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3042\u308a\uff08\u3059\u3063\u304d\u308a\u3057\u305f\u66f8\u304d\u65b9\uff09\nString message = new StringBuilder()\n    .append(\"\u3053\u3093\u306b\u3061\u306f\")\n    .append(\"\u3001\")\n    .append(\"\u7530\u4e2d\u3055\u3093\")\n    .append(\"\uff01\")\n    .toString();<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u304c\u6210\u7acb\u3059\u308b\u4ed5\u7d44\u307f\u306f\u3001<strong>\u5404\u30e1\u30bd\u30c3\u30c9\u304c\u300c\u81ea\u5206\u81ea\u8eab\uff08this\u307e\u305f\u306f\u540c\u3058\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u300d\u3092\u8fd4\u3059\u3053\u3068<\/strong>\u3067\u3059\u3002\u8fd4\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u3055\u3089\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u7d9a\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9-2. \u81ea\u4f5c\u30af\u30e9\u30b9\u3067\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u5b9f\u88c5\u3059\u308b<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306b\u5bfe\u5fdc\u3057\u305f\u6ce8\u6587\u30d3\u30eb\u30c0\u30fc\u30af\u30e9\u30b9\npublic class OrderBuilder {\n    private int customerId;\n    private String productName;\n    private int quantity;\n    private double discountRate;\n\n    \/\/ \u5404setter\u304c\u81ea\u5206\u81ea\u8eab\uff08this\uff09\u3092\u8fd4\u3059 \u2192 \u30c1\u30a7\u30fc\u30f3\u304c\u3067\u304d\u308b\n    public OrderBuilder setCustomerId(int id) {\n        this.customerId = id;\n        return this; \/\/ \u30dd\u30a4\u30f3\u30c8\uff1a\u81ea\u5206\u81ea\u8eab\u3092\u8fd4\u3059\n    }\n\n    public OrderBuilder setProduct(String name, int qty) {\n        this.productName = name;\n        this.quantity = qty;\n        return this;\n    }\n\n    public OrderBuilder applyDiscount(double rate) {\n        this.discountRate = rate;\n        return this;\n    }\n\n    public Order build() {\n        return new Order(customerId, productName, quantity, discountRate);\n    }\n}\n\n\/\/ \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3067\u6ce8\u6587\u3092\u4f5c\u6210\nOrder order = new OrderBuilder()\n    .setCustomerId(1001)\n    .setProduct(\"\u30ce\u30fc\u30c8PC\", 2)\n    .applyDiscount(0.1)\n    .build();<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">9-3. Stream API\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\uff08\u5b9f\u52d9\u3067\u983b\u51fa\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java 8\u4ee5\u964d\u3001<strong>Stream API<\/strong>\u3092\u4f7f\u3063\u305f\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u304c\u5b9f\u52d9\u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff08\u30ea\u30b9\u30c8\u7b49\uff09\u306b\u5bfe\u3059\u308b\u7d5e\u308a\u8fbc\u307f\u30fb\u5909\u63db\u30fb\u96c6\u8a08\u3092\u7c21\u6f54\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">import java.util.List;\nimport java.util.stream.Collectors;\n\n\/\/ \u53d7\u6ce8\u30ea\u30b9\u30c8\u304b\u3089\u7279\u5b9a\u6761\u4ef6\u306e\u5408\u8a08\u91d1\u984d\u3092\u8a08\u7b97\u3059\u308b\uff08\u5b9f\u52d9\u3067\u3088\u304f\u4f7f\u3046\u30d1\u30bf\u30fc\u30f3\uff09\npublic int calculateHighValueOrderTotal(List<Order> orders) {\n    return orders.stream()\n        .filter(order -> order.getStatus().equals(\"\u627f\u8a8d\u6e08\u307f\")) \/\/ \u627f\u8a8d\u6e08\u307f\u306e\u307f\n        .filter(order -> order.getAmount() >= 100000)          \/\/ 10\u4e07\u5186\u4ee5\u4e0a\n        .mapToInt(Order::getAmount)                            \/\/ \u91d1\u984d\u306e\u307f\u53d6\u308a\u51fa\u3059\n        .sum();                                                \/\/ \u5408\u8a08\n}<\/pre>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>stream()<\/strong><br><span style=\"font-size:12px;\">\u30ea\u30b9\u30c8\u3092<br>Stream\u5316<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>filter()<\/strong><br><span style=\"font-size:12px;\">\u6761\u4ef6\u3067<br>\u7d5e\u308a\u8fbc\u307f<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>map()<\/strong><br><span style=\"font-size:12px;\">\u5024\u3092\u5909\u63db<br>\/\u53d6\u308a\u51fa\u3057<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>collect\/sum\/count<\/strong><br><span style=\"font-size:12px;\">\u6700\u7d42\u7d50\u679c\u306b<br>\u307e\u3068\u3081\u308b<\/span><\/div>\n<\/div>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Stream API\u306e\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306f\u6700\u521d\u306f\u96e3\u3057\u304f\u611f\u3058\u307e\u3059\u304c\u3001\u300c\u7d5e\u308a\u8fbc\u3080\u2192\u5909\u63db\u3059\u308b\u2192\u307e\u3068\u3081\u308b\u300d\u3068\u3044\u3046\u6d41\u308c\u3092\u610f\u8b58\u3059\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002SQL\u306e\u300cWHERE \u2192 SELECT \u2192 GROUP BY \/ SUM\u300d\u306e\u6d41\u308c\u306b\u4f3c\u3066\u3044\u307e\u3059\u3002\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u30c7\u30fc\u30bf\u96c6\u8a08\u30fb\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306b\u975e\u5e38\u306b\u5f37\u529b\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-10\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">10<\/span>\n  <span class=\"section-label\" style=\"display:block;\">BUSINESS CASES<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u6d3b\u7528\u4e8b\u4f8b<\/span>\n  <span class=\"section-desc\">\u7d66\u4e0e\u8a08\u7b97\u30fb\u53d7\u6ce8\u51e6\u7406\u30fb\u30ec\u30dd\u30fc\u30c8\u751f\u6210\u306a\u3069\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u30b3\u30fc\u30c9\u4f8b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u307e\u3067\u306e\u77e5\u8b58\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\u5b9f\u969b\u306e\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u4f7f\u3048\u308b\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3067\u3082\u300c\u3069\u3093\u306a\u5834\u9762\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u304b\u300d\u304c\u30a4\u30e1\u30fc\u30b8\u3067\u304d\u308b\u3088\u3046\u3001\u8eab\u8fd1\u306a\u696d\u52d9\u3092\u30c6\u30fc\u30de\u306b\u9078\u3073\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10-1. \u7d66\u4e0e\u8a08\u7b97\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class PayrollCalculator {\n    private static final double OVERTIME_RATE_MULTIPLIER = 1.25; \/\/ \u6b8b\u696d\u5272\u5897\u7387\n\n    \/\/ \u57fa\u672c\u7d66\u8a08\u7b97\n    public static int calculateBaseSalary(int monthlySalary, int workDays, int totalWorkDays) {\n        return (int)((double)monthlySalary \/ totalWorkDays * workDays);\n    }\n\n    \/\/ \u6b8b\u696d\u4ee3\u8a08\u7b97\n    public static int calculateOvertimePay(int monthlySalary, double overtimeHours) {\n        int hourlyRate = monthlySalary \/ 160; \/\/ \u6708160\u6642\u9593\u57fa\u6e96\n        return (int)(hourlyRate * OVERTIME_RATE_MULTIPLIER * overtimeHours);\n    }\n\n    \/\/ \u793e\u4f1a\u4fdd\u967a\u6599\u8a08\u7b97\uff08\u6982\u7b97\uff09\n    public static int calculateSocialInsurance(int salary) {\n        return (int)(salary * 0.1495); \/\/ \u5065\u5eb7\u4fdd\u967a + \u539a\u751f\u5e74\u91d1\u306e\u4f1a\u793e\u30fb\u500b\u4eba\u5408\u8a08\u306e\u6982\u7b97\n    }\n\n    \/\/ \u624b\u53d6\u308a\u984d\u8a08\u7b97\uff08\u3053\u308c\u304c\u6700\u7d42\u7684\u306b\u547c\u3070\u308c\u308b\u30e1\u30bd\u30c3\u30c9\uff09\n    public int calculateNetSalary(int monthlySalary, int workDays, double overtimeHours) {\n        int totalWorkDays = 20; \/\/ \u5bfe\u8c61\u6708\u306e\u6240\u5b9a\u52b4\u50cd\u65e5\u6570\uff08\u4eee\uff09\n        int baseSalary = calculateBaseSalary(monthlySalary, workDays, totalWorkDays);\n        int overtimePay = calculateOvertimePay(monthlySalary, overtimeHours);\n        int grossSalary = baseSalary + overtimePay;\n        int socialInsurance = calculateSocialInsurance(grossSalary);\n        return grossSalary - socialInsurance;\n    }\n}\n\n\/\/ \u4f7f\u3044\u65b9\nPayrollCalculator calc = new PayrollCalculator();\nint netSalary = calc.calculateNetSalary(300000, 18, 12.5);\nSystem.out.println(\"\u624b\u53d6\u308a\u984d: \" + netSalary + \"\u5186\");<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">10-2. \u53d7\u6ce8\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u51e6\u7406<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class OrderValidator {\n    \/\/ \u6ce8\u6587\u5168\u4f53\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\uff08\u8907\u6570\u306e\u30c1\u30a7\u30c3\u30af\u30e1\u30bd\u30c3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\uff09\n    public ValidationResult validateOrder(Order order) {\n        if (!isValidCustomerId(order.getCustomerId())) {\n            return ValidationResult.error(\"\u9867\u5ba2ID\u304c\u4e0d\u6b63\u3067\u3059\");\n        }\n        if (!isValidQuantity(order.getQuantity())) {\n            return ValidationResult.error(\"\u6570\u91cf\u306f1\u301c999\u306e\u7bc4\u56f2\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\");\n        }\n        if (!hasEnoughStock(order.getProductId(), order.getQuantity())) {\n            return ValidationResult.error(\"\u5728\u5eab\u304c\u4e0d\u8db3\u3057\u3066\u3044\u307e\u3059\");\n        }\n        return ValidationResult.success();\n    }\n\n    private boolean isValidCustomerId(int customerId) {\n        return customerId > 0 && customerId <= 999999;\n    }\n\n    private boolean isValidQuantity(int quantity) {\n        return quantity >= 1 && quantity <= 999;\n    }\n\n    private boolean hasEnoughStock(int productId, int quantity) {\n        int stock = getStockCount(productId); \/\/ DB\u7167\u4f1a\u3092\u60f3\u5b9a\n        return stock >= quantity;\n    }\n\n    private int getStockCount(int productId) {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u5728\u5eab\u6570\u3092\u53d6\u5f97\uff08\u5b9f\u88c5\u7701\u7565\uff09\n        return 100; \/\/ \u30c0\u30df\u30fc\u30c7\u30fc\u30bf\n    }\n}<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001<strong>\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u51e6\u7406\u3092\u7d30\u304b\u3044\u30e1\u30bd\u30c3\u30c9\u306b\u5206\u5272<\/strong>\u3057\u3066\u3044\u307e\u3059\u3002\u300cisValidCustomerId\u300d\u300cisValidQuantity\u300d\u306e\u3088\u3046\u306bprivate\u30e1\u30bd\u30c3\u30c9\u306b\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u5404\u30c1\u30a7\u30c3\u30af\u306e\u30ed\u30b8\u30c3\u30af\u304c\u72ec\u7acb\u3057\u3066\u30c6\u30b9\u30c8\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u65b0\u3057\u3044\u30c1\u30a7\u30c3\u30af\u9805\u76ee\u3092\u8ffd\u52a0\u3059\u308b\u3068\u304d\u3082\u3001\u65b0\u3057\u3044private\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u3063\u3066\u547c\u3073\u51fa\u3059\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10-3. \u30ec\u30dd\u30fc\u30c8\u751f\u6210\u51e6\u7406\uff08\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u6d3b\u7528\u4f8b\uff09<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">public class SalesReportGenerator {\n    \/\/ \u6708\u6b21\u58f2\u4e0a\u30ec\u30dd\u30fc\u30c8\u3092\u751f\u6210\u3059\u308b\u30e1\u30bd\u30c3\u30c9\n    public String generateMonthlySalesReport(List<Order> orders, int year, int month) {\n        \/\/ Stream API\u306e\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3067\u96c6\u8a08\n        double totalSales = orders.stream()\n            .filter(o -> o.getYear() == year && o.getMonth() == month)\n            .filter(o -> o.getStatus().equals(\"\u5b8c\u4e86\"))\n            .mapToDouble(Order::getAmount)\n            .sum();\n\n        long orderCount = orders.stream()\n            .filter(o -> o.getYear() == year && o.getMonth() == month)\n            .filter(o -> o.getStatus().equals(\"\u5b8c\u4e86\"))\n            .count();\n\n        double averageOrderValue = orderCount > 0 ? totalSales \/ orderCount : 0;\n\n        return formatReport(year, month, totalSales, orderCount, averageOrderValue);\n    }\n\n    \/\/ \u6574\u5f62\u51e6\u7406\u3092\u5225\u30e1\u30bd\u30c3\u30c9\u306b\u5206\u96e2\n    private String formatReport(int year, int month, double total, long count, double avg) {\n        return String.format(\n            \"%d\u5e74%d\u6708 \u6708\u6b21\u58f2\u4e0a\u30ec\u30dd\u30fc\u30c8\\n\" +\n            \"========================\\n\" +\n            \"\u7dcf\u58f2\u4e0a: %,.0f\u5186\\n\" +\n            \"\u6ce8\u6587\u4ef6\u6570: %d\u4ef6\\n\" +\n            \"\u5e73\u5747\u53d7\u6ce8\u984d: %,.0f\u5186\\n\",\n            year, month, total, count, avg\n        );\n    }\n}<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u30e1\u30bd\u30c3\u30c9\u3092\u5c0f\u3055\u304f\u5206\u5272\u3059\u308b\u307b\u3069\u4fdd\u5b88\u3057\u3084\u3059\u304f\u306a\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u300c1\u30e1\u30bd\u30c3\u30c91\u8cac\u4efb\uff08\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\uff09\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u304c\u5b9f\u52d9\u3067\u306f\u91cd\u8981\u3067\u3059\u3002\u4e0a\u8a18\u306eformatReport\u30e1\u30bd\u30c3\u30c9\u3092generateMonthlySalesReport\u304b\u3089\u5206\u96e2\u3057\u305f\u3088\u3046\u306b\u3001\u300c\u8a08\u7b97\u3059\u308b\u51e6\u7406\u300d\u3068\u300c\u6574\u5f62\u3059\u308b\u51e6\u7406\u300d\u306f\u5225\u30e1\u30bd\u30c3\u30c9\u306b\u3059\u308b\u65b9\u304c\u3001\u5f8c\u304b\u3089\u5909\u66f4\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div style=\"margin:48px 0 8px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap;\"><a href=\"https:\/\/aikanri.genai-ai.co.jp\/seminar2-blog\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_content=cc-java-methods&#038;blog_slug=cc-java-methods\" target=\"_blank\" rel=\"noopener\" aria-label=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff08\u7121\u6599\u30fb1on1\u30fb60\u5206\uff09\u306e\u4e88\u7d04\u753b\u9762\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_seminar_claude_code_2026.jpg\" alt=\"Claude Code \u5b8c\u5168\u89e3\u8aac\u30bb\u30df\u30ca\u30fc\uff5c\u7d4c\u55b6\u8005\u30fb\u4f1a\u793e\u5f79\u54e1\u5c02\u7528 1on1 60\u5206 \u7121\u6599\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&#038;utm_medium=h2banner&#038;utm_campaign=cc-java-methods&#038;utm_content=h2-banner-kanri\" target=\"_blank\" rel=\"noopener\" aria-label=\"AI\u9b3c\u7ba1\u7406 \u516c\u5f0f\u30b5\u30a4\u30c8\u3078\" style=\"flex:1 1 280px;max-width:360px;text-decoration:none;\"><img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/05\/cta_blog_1to1.jpg\" alt=\"Claude Code\u3092\u7d4c\u55b6\u306b\u6d3b\u304b\u3057\u305f\u3044\u65b9\u3078 \u2014 AI\u9b3c\u7ba1\u7406\" style=\"width:100%;height:auto;border-radius:8px;display:block;\"><\/a><\/div>\n\n\n<div id=\"sec-11\"><\/div>\n<h2 class=\"section-header-img\" style=\"margin:32px 0 24px;border-radius:8px;overflow:hidden;background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);padding:32px 28px;color:#fff;position:relative;border:none;border-left:none;text-align:left;\">\n  <span class=\"section-number\" style=\"display:block;\">11<\/span>\n  <span class=\"section-label\" style=\"display:block;\">CLAUDE CODE AUTOMATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067Java\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3092\u81ea\u52d5\u5316\u3059\u308b<\/span>\n  <span class=\"section-desc\">\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082AI\u3092\u4f7f\u3063\u3066\u5b9f\u52d9\u54c1\u8cea\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8a2d\u8a08\u3067\u304d\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u304b\u3089\u306f\u3001<strong>Claude Code\u3092\u6d3b\u7528\u3057\u3066Java\u306e\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u30fb\u5b9f\u88c5\u3092\u52b9\u7387\u5316\u3059\u308b\u65b9\u6cd5<\/strong>\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u306a\u304f\u3066\u3082\u3001Claude Code\u3092\u4f7f\u3048\u3070\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u306e\u54c1\u8cea\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3093\u3067\u3044\u308b\u65b9\u306f\u3082\u3061\u308d\u3093\u3001\u65e2\u5b58\u306eJava\u30b3\u30fc\u30c9\u3092\u4fdd\u5b88\u30fb\u6539\u5584\u3057\u305f\u3044\u65b9\u306b\u3082\u3001Claude Code\u306f\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u306e\u5f37\u529b\u306a\u30d1\u30fc\u30c8\u30ca\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u300c\u3053\u306e\u30b3\u30fc\u30c9\u3092\u3069\u3046\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3059\u308b\u304b\u300d\u300c\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u306b\u3059\u308b\u306b\u306f\u300d\u3068\u3044\u3046\u76f8\u8ac7\u304c\u7279\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-1. Claude Code\u304c\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u652f\u63f4<\/h3>\n\n\n\n<div style=\"background:#fafafa;border-radius:8px;padding:16px 20px;margin:16px 0;border-left:4px solid #dc2626;\">\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30e1\u30bd\u30c3\u30c9\u306e\u5206\u5272\u63d0\u6848\uff1a<\/strong>\u9577\u5927\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u9069\u5207\u306a\u7c92\u5ea6\u306b\u5206\u5272\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u6848\u3057\u3066\u304f\u308c\u308b<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u547d\u540d\u6539\u5584\uff1a<\/strong>\u610f\u56f3\u304c\u4f1d\u308f\u308a\u306b\u304f\u3044\u30e1\u30bd\u30c3\u30c9\u540d\u3092\u3001\u3088\u308a\u660e\u78ba\u306a\u540d\u524d\u306b\u6539\u5584\u63d0\u6848<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u5f15\u6570\u8a2d\u8a08\uff1a<\/strong>\u5f15\u6570\u304c\u591a\u3059\u304e\u308b\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5316\u3092\u63d0\u6848<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u81ea\u52d5\u751f\u6210\uff1a<\/strong>\u30e1\u30bd\u30c3\u30c9\u306b\u5bfe\u3059\u308bJUnit\u30c6\u30b9\u30c8\u3092\u81ea\u52d5\u751f\u6210<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u8a2d\u8a08\uff1a<\/strong>\u4f7f\u3044\u3084\u3059\u3044\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306e\u30d0\u30ea\u30a2\u30f3\u30c8\u3092\u63d0\u6848<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>static\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u5909\u63db\uff1a<\/strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092\u4f7f\u308f\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u3092static\u306b\u5909\u63db<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span><strong>JavaDoc\u30b3\u30e1\u30f3\u30c8\u751f\u6210\uff1a<\/strong>\u30e1\u30bd\u30c3\u30c9\u306e\u8aac\u660e\u30b3\u30e1\u30f3\u30c8\u3092\u81ea\u52d5\u751f\u6210<\/span><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-2. Claude Code\u3078\u306e\u52b9\u679c\u7684\u306a\u6307\u793a\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u306b\u5bfe\u3057\u3066\u3001\u5177\u4f53\u7684\u306b\u3069\u306e\u3088\u3046\u306b\u6307\u793a\u3059\u308b\u3068\u52b9\u679c\u7684\u304b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\"># \u4f8b1: \u65e2\u5b58\u30e1\u30bd\u30c3\u30c9\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u4f9d\u983c\n\u300c\u4ee5\u4e0b\u306eJava\u30e1\u30bd\u30c3\u30c9\u3092\u3001\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u5f93\u3063\u3066\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n\u30e1\u30bd\u30c3\u30c9\u304c\u8907\u6570\u306e\u8cac\u52d9\u3092\u6301\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u9069\u5207\u306b\u5206\u5272\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n[\u65e2\u5b58\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051]\u300d\n\n# \u4f8b2: \u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u306e\u76f8\u8ac7\n\u300c\u7d66\u4e0e\u8a08\u7b97\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u4e2d\u3067\u3059\u3002\n\u4ee5\u4e0b\u306e\u696d\u52d9\u30eb\u30fc\u30eb\u3092Java\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n- \u57fa\u672c\u7d66\u306f\u6708\u7d66\u5236\u3067\u65e5\u5272\u308a\u8a08\u7b97\u3042\u308a\n- \u6b8b\u696d\u4ee3\u306f\u57fa\u672c\u6642\u7d66\u306e1.25\u500d\n- \u6df1\u591c\u6b8b\u696d\uff0822\u6642\u4ee5\u964d\uff09\u306f1.5\u500d\n- \u793e\u4f1a\u4fdd\u967a\u6599\u306f\u5065\u5eb7\u4fdd\u967a\u6599\u3068\u539a\u751f\u5e74\u91d1\u3092\u5408\u7b97\u3057\u3066\u8a08\u7b97\n\u6700\u9069\u306a\u30e1\u30bd\u30c3\u30c9\u5206\u5272\u3068\u5f15\u6570\u8a2d\u8a08\u3092\u63d0\u6848\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u300d\n\n# \u4f8b3: \u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u751f\u6210\n\u300c\u4ee5\u4e0b\u306eJava\u30e1\u30bd\u30c3\u30c9\u306b\u5bfe\u3059\u308bJUnit 5\u306e\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n\u6b63\u5e38\u7cfb\u30fb\u7570\u5e38\u7cfb\u30fb\u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u7db2\u7f85\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n[\u30e1\u30bd\u30c3\u30c9\u306e\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051]\u300d<\/pre>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-3. Claude Code\u306b\u3088\u308b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u5b9f\u6f14<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u3088\u304f\u306a\u3044\u30b3\u30fc\u30c9\u306e\u4f8b\u300d\u3092Claude Code\u306b\u6539\u5584\u3057\u3066\u3082\u3089\u3046\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ Before: 1\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u591a\u3059\u304e\u308b\u8cac\u52d9\u3092\u6301\u3063\u3066\u3044\u308b\uff08\u3088\u304f\u306a\u3044\u4f8b\uff09\npublic void processMonthlyPayroll(List<Employee> employees) {\n    for (Employee e : employees) {\n        \/\/ \u7d66\u4e0e\u8a08\u7b97\n        int base = e.getMonthlySalary() * e.getWorkDays() \/ 20;\n        int overtime = (int)(e.getOvertimeHours() * (e.getMonthlySalary() \/ 160) * 1.25);\n        int gross = base + overtime;\n        \/\/ \u63a7\u9664\u8a08\u7b97\n        int insurance = (int)(gross * 0.1495);\n        int incomeTax = (int)(gross * 0.05);\n        int net = gross - insurance - incomeTax;\n        \/\/ \u30c7\u30fc\u30bf\u4fdd\u5b58\n        e.setNetSalary(net);\n        payrollRepository.save(e.getId(), net, java.time.LocalDate.now());\n        \/\/ \u30e1\u30fc\u30eb\u9001\u4fe1\n        String body = \"\u4eca\u6708\u306e\u7d66\u4e0e\u660e\u7d30\u3092\u304a\u77e5\u3089\u305b\u3057\u307e\u3059\u3002\u624b\u53d6\u308a\u984d: \" + net + \"\u5186\";\n        mailService.send(e.getEmail(), \"\u7d66\u4e0e\u660e\u7d30\", body);\n        System.out.println(\"\u51e6\u7406\u5b8c\u4e86: \" + e.getName());\n    }\n}<\/pre>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u300c\u7d66\u4e0e\u8a08\u7b97\u30fb\u63a7\u9664\u8a08\u7b97\u30fb\u30c7\u30fc\u30bf\u4fdd\u5b58\u30fb\u30e1\u30fc\u30eb\u9001\u4fe1\u30fb\u30ed\u30b0\u51fa\u529b\u300d\u30685\u3064\u306e\u8cac\u52d9\u304c\u6df7\u5728\u3057\u3066\u3044\u307e\u3059\u3002Claude Code\u306b\u300c\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u306b\u5f93\u3063\u3066\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6539\u5584\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ After: Claude Code\u304c\u63d0\u6848\u3057\u305f\u5206\u5272\u5f8c\u306e\u30b3\u30fc\u30c9\npublic class PayrollService {\n    private final PayrollRepository payrollRepository;\n    private final MailService mailService;\n\n    \/\/ \u30e1\u30a4\u30f3\u30d5\u30ed\u30fc\uff08\u5354\u8abf\u306e\u307f\uff09\n    public void processMonthlyPayroll(List<Employee> employees) {\n        for (Employee employee : employees) {\n            int netSalary = calculateNetSalary(employee);\n            savePayroll(employee.getId(), netSalary);\n            notifyEmployee(employee, netSalary);\n            logPayrollCompletion(employee.getName());\n        }\n    }\n\n    \/\/ \u7d66\u4e0e\u8a08\u7b97\uff08\u7d14\u7c8b\u306a\u8a08\u7b97\uff09\n    private int calculateNetSalary(Employee employee) {\n        int grossSalary = calculateGrossSalary(employee);\n        int totalDeductions = calculateTotalDeductions(grossSalary);\n        return grossSalary - totalDeductions;\n    }\n\n    private int calculateGrossSalary(Employee employee) {\n        int base = calculateBaseSalary(employee.getMonthlySalary(), employee.getWorkDays());\n        int overtime = calculateOvertimePay(employee.getMonthlySalary(), employee.getOvertimeHours());\n        return base + overtime;\n    }\n\n    private int calculateBaseSalary(int monthlySalary, int workDays) {\n        return monthlySalary * workDays \/ 20;\n    }\n\n    private int calculateOvertimePay(int monthlySalary, double overtimeHours) {\n        int hourlyRate = monthlySalary \/ 160;\n        return (int)(hourlyRate * 1.25 * overtimeHours);\n    }\n\n    private int calculateTotalDeductions(int grossSalary) {\n        int insurance = (int)(grossSalary * 0.1495);\n        int incomeTax = (int)(grossSalary * 0.05);\n        return insurance + incomeTax;\n    }\n\n    \/\/ \u4fdd\u5b58\uff08\u526f\u4f5c\u7528\u306e\u307f\uff09\n    private void savePayroll(int employeeId, int netSalary) {\n        payrollRepository.save(employeeId, netSalary, java.time.LocalDate.now());\n    }\n\n    \/\/ \u901a\u77e5\uff08\u526f\u4f5c\u7528\u306e\u307f\uff09\n    private void notifyEmployee(Employee employee, int netSalary) {\n        String body = \"\u4eca\u6708\u306e\u7d66\u4e0e\u660e\u7d30\u3092\u304a\u77e5\u3089\u305b\u3057\u307e\u3059\u3002\u624b\u53d6\u308a\u984d: \" + netSalary + \"\u5186\";\n        mailService.send(employee.getEmail(), \"\u7d66\u4e0e\u660e\u7d30\", body);\n    }\n\n    \/\/ \u30ed\u30b0\uff08\u526f\u4f5c\u7528\u306e\u307f\uff09\n    private void logPayrollCompletion(String employeeName) {\n        System.out.println(\"\u7d66\u4e0e\u51e6\u7406\u5b8c\u4e86: \" + employeeName);\n    }\n}<\/pre>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Claude Code\u306b\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u4f9d\u983c\u3059\u308b\u3068\u304d\u3001\u300c\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u3067\u5206\u5272\u3057\u3066\u300d\u300c\u30c6\u30b9\u30c8\u3057\u3084\u3059\u304f\u3057\u3066\u300d\u300c\u53ef\u8aad\u6027\u3092\u4e0a\u3052\u3066\u300d\u3068\u3044\u3046\u5177\u4f53\u7684\u306a\u65b9\u91dd\u3092\u6307\u793a\u3059\u308b\u3068\u3001\u3088\u308a\u7cbe\u5ea6\u306e\u9ad8\u3044\u63d0\u6848\u304c\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002\u300c\u306a\u3093\u3068\u306a\u304f\u6539\u5584\u3057\u3066\u300d\u3067\u306f\u306a\u304f\u3001\u4f55\u306e\u305f\u3081\u306b\u6539\u5584\u3059\u308b\u304b\u3092\u660e\u793a\u3059\u308b\u306e\u304c\u30b3\u30c4\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-4. \u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u6700\u521d\u306b\u8a66\u305b\u308bClaude Code\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082\u3001Claude Code\u3092\u4f7f\u3063\u3066Java\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3092\u5b66\u3093\u3060\u308a\u3001\u65e2\u5b58\u30b3\u30fc\u30c9\u3092\u6539\u5584\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002\u307e\u305a\u306f\u4ee5\u4e0b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u304b\u3089\u8a66\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/th><th>Claude Code\u3078\u306e\u6307\u793a\u4f8b<\/th><th>\u671f\u5f85\u3067\u304d\u308b\u6210\u679c<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u696d\u52d9\u30ed\u30b8\u30c3\u30af\u306e\u30b3\u30fc\u30c9\u5316<\/td><td>\u300c\u6708\u6b21\u30ec\u30dd\u30fc\u30c8\u3092\u751f\u6210\u3059\u308b\u696d\u52d9\u3092\u8aac\u660e\u3059\u308b\u306e\u3067Java\u30e1\u30bd\u30c3\u30c9\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u696d\u52d9\u30d5\u30ed\u30fc\u3092\u8aac\u660e<\/td><td>\u696d\u52d9\u3092\u6b63\u78ba\u306b\u53cd\u6620\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08<\/td><\/tr>\n<tr><td>\u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u7406\u89e3<\/td><td>\u300c\u3053\u306eJava\u30b3\u30fc\u30c9\u304c\u4f55\u3092\u3057\u3066\u3044\u308b\u304b\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u5206\u304b\u308b\u3088\u3046\u306b\u8aac\u660e\u3057\u3066\u304f\u3060\u3055\u3044\u300d<\/td><td>\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u3068\u52d5\u4f5c\u304c\u5206\u304b\u308b<\/td><\/tr>\n<tr><td>\u547d\u540d\u306e\u6539\u5584<\/td><td>\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u540d\u304c\u3061\u3083\u3093\u3068\u610f\u56f3\u3092\u8868\u3057\u3066\u3044\u308b\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001\u6539\u5584\u6848\u3092\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u300d<\/td><td>\u8aad\u307f\u3084\u3059\u3044\u547d\u540d\u306b\u6539\u5584<\/td><\/tr>\n<tr><td>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316<\/td><td>\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306eJavaDoc\u30b3\u30e1\u30f3\u30c8\u3092\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\u300d<\/td><td>\u6a19\u6e96\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u81ea\u52d5\u751f\u6210<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<h3 class=\"wp-block-heading\">Java\u30e1\u30bd\u30c3\u30c9\u3082Claude Code\u3067\u81ea\u52d5\u5316\u3067\u304d\u307e\u3059<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJava\u306e\u30b3\u30fc\u30c9\u3092\u304d\u3061\u3093\u3068\u8a2d\u8a08\u3057\u305f\u3044\u304c\u3001\u81ea\u793e\u306b\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u3044\u306a\u3044\u300d\u300c\u65e2\u5b58\u306eJava\u30b7\u30b9\u30c6\u30e0\u3092\u4fdd\u5b88\u30fb\u6539\u5584\u3057\u305f\u3044\u304c\u4f55\u304b\u3089\u624b\u3092\u3064\u3051\u308c\u3070\u3044\u3044\u304b\u5206\u304b\u3089\u306a\u3044\u300d\u2014\u2014\u305d\u3093\u306a\u8ab2\u984c\u3092Claude Code\u3067\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306e\u4f34\u8d70\u652f\u63f4\u3092AI\u9b3c\u7ba1\u7406\u3067\u306f\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u30fb\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u30fb\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u751f\u6210\u30fbJavaDoc\u306e\u81ea\u52d5\u5316\u307e\u3067\u3001Claude Code\u3092\u4f7f\u3063\u305f\u5b9f\u52d9\u6539\u5584\u3092\u4e00\u7dd2\u306b\u9032\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">\u300cJava\u306e\u77e5\u8b58\u304c\u306a\u304f\u3066\u3082Claude Code\u3092\u4f7f\u3048\u308b\u304b\u300d\u3068\u3044\u3046\u8cea\u554f\u3092\u3088\u304f\u53d7\u3051\u307e\u3059\u3002\u7b54\u3048\u306fYES\u3067\u3059\u3002\u696d\u52d9\u306e\u6d41\u308c\u3092\u8a00\u8449\u3067\u8aac\u660e\u3067\u304d\u308c\u3070\u3001Claude Code\u304c\u305d\u308c\u3092\u30b3\u30fc\u30c9\u306b\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306fJava\u306e\u6587\u6cd5\u3088\u308a\u3001\u300c\u3069\u3093\u306a\u51e6\u7406\u3092\u3057\u305f\u3044\u304b\u300d\u3092\u6b63\u78ba\u306b\u4f1d\u3048\u308b\u529b\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:linear-gradient(135deg,#1a1a1a 0%,#2a1015 100%);border-radius:16px;padding:36px 32px;margin:48px 0 16px;color:#fff;\">\n  <p style=\"font-size:13px;font-weight:700;color:#dc2626;letter-spacing:2px;margin:0 0 12px;\">NEXT STEP<\/p>\n  <p style=\"font-size:22px;font-weight:800;line-height:1.5;margin:0 0 20px;\">\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9\u3092\u3001\u3042\u306a\u305f\u306e\u30d3\u30b8\u30cd\u30b9\u3067<br>\u5b9f\u8df5\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f<\/p>\n  <div style=\"background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);border-radius:12px;padding:24px;max-width:560px;margin:0 auto;\">\n    <p style=\"font-size:13px;color:#dc2626;font-weight:700;margin:0 0 8px;\">AI\u6d3b\u7528\u3092\u81ea\u793e\u3067\u56de\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u65b9\u3078<\/p>\n    <p style=\"font-size:20px;font-weight:800;margin:0 0 12px;\">AI\u9b3c\u7ba1\u7406<\/p>\n    <p style=\"font-size:14px;color:rgba(255,255,255,0.75);margin:0 0 20px;line-height:1.7;\">Claude Code\u30fbCowork\u5c0e\u5165\u652f\u63f4\u304b\u3089\u696d\u52d9\u8a2d\u8a08\u30fb\u793e\u5185\u6d78\u900f\u307e\u3067\u5b9f\u8df5\u30d9\u30fc\u30b9\u3067\u4f34\u8d70\u3002\u300c\u81ea\u793e\u3067\u56de\u305b\u308b\u7d44\u7e54\u300d\u309290\u65e5\u3067\u4f5c\u308b\u7d4c\u55b6\u8005\u5411\u3051\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3002<\/p>\n    <div style=\"text-align:center;\">\n      <a href=\"https:\/\/aikanri.genai-ai.co.jp\/?utm_source=blog&utm_medium=article&utm_campaign=cc-java-methods&utm_content=next-step-cta\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#dc2626;color:#fff;font-weight:700;font-size:15px;padding:14px 32px;border-radius:30px;text-decoration:none;\">AI\u9b3c\u7ba1\u7406\u3092\u8a73\u3057\u304f\u898b\u308b \u2192<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u95a2\u6570\u306f\u4f55\u304c\u9055\u3044\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Java\u3067\u306f\u51e6\u7406\u306e\u5358\u4f4d\u3092\u300c\u30e1\u30bd\u30c3\u30c9\u300d\u3068\u547c\u3073\u307e\u3059\u3002C\u8a00\u8a9e\u3084Python\u306e\u300c\u95a2\u6570\u300d\u3068\u6982\u5ff5\u306f\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u6700\u5927\u306e\u9055\u3044\u306f\u300cJava\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305a\u30af\u30e9\u30b9\u306e\u4e2d\u306b\u5b9a\u7fa9\u3059\u308b\u300d\u70b9\u3067\u3059\u3002\u95a2\u6570\u306f\u30af\u30e9\u30b9\u306e\u5916\uff08\u30b0\u30ed\u30fc\u30d0\u30eb\uff09\u306b\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u304c\u3001Java\u306b\u306f\u305d\u308c\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u300c\u632f\u308b\u821e\u3044\u300d\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306evoid\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. void\u306f\u300c\u623b\u308a\u5024\u306a\u3057\u300d\u3092\u610f\u5473\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u578b\u306bvoid\u3092\u66f8\u304f\u3068\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306freturn\u6587\u3067\u5024\u3092\u8fd4\u3057\u307e\u305b\u3093\u3002\u30ed\u30b0\u51fa\u529b\u30fb\u30c7\u30fc\u30bf\u4fdd\u5b58\u30fb\u753b\u9762\u66f4\u65b0\u306a\u3069\u3001\u300c\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u76ee\u7684\u3067\u3001\u7d50\u679c\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u306a\u3044\u300d\u30e1\u30bd\u30c3\u30c9\u306b\u4f7f\u3044\u307e\u3059\u3002\u306a\u304a\u3001void\u30e1\u30bd\u30c3\u30c9\u3067\u3082return;\uff08\u5024\u306a\u3057\uff09\u3068\u66f8\u3044\u3066\u51e6\u7406\u3092\u9014\u4e2d\u3067\u7d42\u4e86\u3055\u305b\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306estatic\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u3064\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. static\u30e1\u30bd\u30c3\u30c9\u306f\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u56fa\u6709\u306e\u30c7\u30fc\u30bf\uff09\u3092\u4f7f\u308f\u306a\u3044\u51e6\u7406\u300d\u306b\u4f7f\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u6570\u5024\u8a08\u7b97\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\uff08Math.abs()\uff09\u3001\u578b\u5909\u63db\uff08Integer.parseInt()\uff09\u3001\u6c4e\u7528\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u304c\u5178\u578b\u4f8b\u3067\u3059\u3002\u9006\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u306b\u5fdc\u3058\u3066\u52d5\u4f5c\u304c\u5909\u308f\u308b\u51e6\u7406\u306fstatic\u306b\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u5224\u65ad\u57fa\u6e96\u306f\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\u304b\uff1f\u300d\u3067\u3001\u53c2\u7167\u3057\u306a\u3044\u306a\u3089static\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306b\u540c\u3058\u540d\u524d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u5f15\u6570\u306e\u578b\u30fb\u500b\u6570\u30fb\u9806\u5e8f\u306e\u5c11\u306a\u304f\u3068\u30821\u3064\u304c\u7570\u306a\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070calculateTax(int price)\u3068calculateTax(int price, double taxRate)\u306e\u3088\u3046\u306b\u3001\u5f15\u6570\u306e\u9055\u3044\u3067\u540c\u540d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u3089\u308c\u307e\u3059\u3002\u623b\u308a\u5024\u306e\u578b\u3060\u3051\u304c\u9055\u3046\u5834\u5408\u306f\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u306a\u3089\u305a\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306f\u3069\u3046\u3084\u3063\u3066\u4f5c\u308a\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001\u5404\u30e1\u30bd\u30c3\u30c9\u304c\u300c\u81ea\u5206\u81ea\u8eab\uff08this\uff09\u300d\u3092\u8fd4\u3059\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u300creturn this;\u300d\u3068\u66f8\u304f\u3053\u3068\u3067\u3001\u547c\u3073\u51fa\u3057\u5143\u306f\u8fd4\u3063\u3066\u304d\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u3055\u3089\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u7d9a\u3051\u3089\u308c\u307e\u3059\u3002StringBuilder\u3084Stream API\u306e\u3088\u3046\u306a\u5b9f\u52d9\u3067\u3088\u304f\u4f7f\u3046\u30af\u30e9\u30b9\u306f\u6700\u521d\u304b\u3089\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u5bfe\u5fdc\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u81ea\u4f5c\u30af\u30e9\u30b9\u3067\u3082\u540c\u3058\u8a2d\u8a08\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u5f15\u6570\u3068\u623b\u308a\u5024\u306e\u9055\u3044\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u5f15\u6570\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u306f\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u300c\u5165\u529b\u300d\u3067\u3059\u3002\u623b\u308a\u5024\u306f\u30e1\u30bd\u30c3\u30c9\u304c\u51e6\u7406\u3057\u305f\u7d50\u679c\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u30c7\u30fc\u30bf\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u300c\u51fa\u529b\u300d\u3067\u3059\u3002\u4f8b\u3048\u3070\u300ccalculateTax(int price)\u300d\u3067\u306f\u3001price\u304c\u5f15\u6570\uff08\u5165\u529b\uff09\u3067\u3001return\u6587\u3067\u8fd4\u3059\u6d88\u8cbb\u7a0e\u984d\u304c\u623b\u308a\u5024\uff08\u51fa\u529b\uff09\u3067\u3059\u3002\u623b\u308a\u5024\u304c\u306a\u3044\u5834\u5408\u306fvoid\u3001\u5f15\u6570\u304c\u4e0d\u8981\u306a\u5834\u5408\u306f\u62ec\u5f27\u5185\u3092\u7a7a\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Java\u3067\u306f\u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3001\u4f8b\u5916\uff08Exception\uff09\u3092\u30b9\u30ed\u30fc\u3057\u3066\u547c\u3073\u51fa\u3057\u5143\u306b\u901a\u77e5\u3057\u307e\u3059\u3002void\u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u306e\u6210\u5426\u3092\u4f1d\u3048\u308b\u306b\u306f\u3001\u5931\u6557\u6642\u306bRuntimeException\u3084\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092throw\u3057\u307e\u3059\u3002\u547c\u3073\u51fa\u3057\u5143\u3067\u306ftry-catch\u30d6\u30ed\u30c3\u30af\u3067\u4f8b\u5916\u3092\u6355\u6349\u3057\u3066\u51e6\u7406\u3057\u307e\u3059\u3002boolean\u623b\u308a\u5024\u3067true\/false\u3092\u8fd4\u3059\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u5931\u6557\u306e\u7406\u7531\u304c\u4f1d\u3048\u3089\u308c\u306a\u3044\u305f\u3081\u3001\u696d\u52d9\u30ed\u30b8\u30c3\u30af\u306e\u4f8b\u5916\u306b\u306f\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3067\u3088\u304f\u3042\u308b\u5931\u6557\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u4ee3\u8868\u7684\u306a\u5931\u6557\u30d1\u30bf\u30fc\u30f3\u306f4\u3064\u3042\u308a\u307e\u3059\u3002\u2460\u30e1\u30bd\u30c3\u30c9\u304c\u9577\u3059\u304e\u308b\uff081\u30e1\u30bd\u30c3\u30c9\u304c100\u884c\u4ee5\u4e0a\u306b\u306a\u308b\u3068\u5206\u5272\u304c\u5fc5\u8981\uff09\u3001\u24611\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u8907\u6570\u306e\u8cac\u4efb\u3092\u6301\u305f\u305b\u308b\uff08\u8a08\u7b97\uff0b\u4fdd\u5b58\uff0b\u9001\u4fe1\u30921\u30e1\u30bd\u30c3\u30c9\u306b\u66f8\u304f\uff09\u3001\u2462\u5f15\u6570\u304c\u591a\u3059\u304e\u308b\uff084\u500b\u4ee5\u4e0a\u306b\u306a\u3063\u305f\u3089\u30d1\u30e9\u30e1\u30fc\u30bf\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5316\u3092\u691c\u8a0e\uff09\u3001\u2463\u610f\u5473\u306e\u306a\u3044\u540d\u524d\u306b\u3059\u308b\uff08process\u3001doSomething\u7b49\uff09\u3002Claude Code\u306b\u30b3\u30fc\u30c9\u3092\u898b\u305b\u3066\u300c\u6539\u5584\u70b9\u3092\u6307\u6458\u3057\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3068\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u691c\u51fa\u3057\u3066\u6539\u5584\u63d0\u6848\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u95a2\u6570\u306f\u4f55\u304c\u9055\u3044\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Java\u3067\u306f\u51e6\u7406\u306e\u5358\u4f4d\u3092\u300c\u30e1\u30bd\u30c3\u30c9\u300d\u3068\u547c\u3073\u307e\u3059\u3002C\u8a00\u8a9e\u3084Python\u306e\u300c\u95a2\u6570\u300d\u3068\u6982\u5ff5\u306f\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u6700\u5927\u306e\u9055\u3044\u306f\u300cJava\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305a\u30af\u30e9\u30b9\u306e\u4e2d\u306b\u5b9a\u7fa9\u3059\u308b\u300d\u70b9\u3067\u3059\u3002\u95a2\u6570\u306f\u30af\u30e9\u30b9\u306e\u5916\uff08\u30b0\u30ed\u30fc\u30d0\u30eb\uff09\u306b\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u304c\u3001Java\u306b\u306f\u305d\u308c\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u300c\u632f\u308b\u821e\u3044\u300d\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306evoid\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"void\u306f\u300c\u623b\u308a\u5024\u306a\u3057\u300d\u3092\u610f\u5473\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306e\u578b\u306bvoid\u3092\u66f8\u304f\u3068\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u306freturn\u6587\u3067\u5024\u3092\u8fd4\u3057\u307e\u305b\u3093\u3002\u30ed\u30b0\u51fa\u529b\u30fb\u30c7\u30fc\u30bf\u4fdd\u5b58\u30fb\u753b\u9762\u66f4\u65b0\u306a\u3069\u3001\u300c\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u76ee\u7684\u3067\u3001\u7d50\u679c\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u306a\u3044\u300d\u30e1\u30bd\u30c3\u30c9\u306b\u4f7f\u3044\u307e\u3059\u3002\u306a\u304a\u3001void\u30e1\u30bd\u30c3\u30c9\u3067\u3082return;\uff08\u5024\u306a\u3057\uff09\u3068\u66f8\u3044\u3066\u51e6\u7406\u3092\u9014\u4e2d\u3067\u7d42\u4e86\u3055\u305b\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306estatic\u30e1\u30bd\u30c3\u30c9\u306f\u3044\u3064\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"static\u30e1\u30bd\u30c3\u30c9\u306f\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u56fa\u6709\u306e\u30c7\u30fc\u30bf\uff09\u3092\u4f7f\u308f\u306a\u3044\u51e6\u7406\u300d\u306b\u4f7f\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u6570\u5024\u8a08\u7b97\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\uff08Math.abs()\uff09\u3001\u578b\u5909\u63db\uff08Integer.parseInt()\uff09\u3001\u6c4e\u7528\u7684\u306a\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u304c\u5178\u578b\u4f8b\u3067\u3059\u3002\u9006\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u306b\u5fdc\u3058\u3066\u52d5\u4f5c\u304c\u5909\u308f\u308b\u51e6\u7406\u306fstatic\u306b\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u5224\u65ad\u57fa\u6e96\u306f\u300c\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\u304b\uff1f\u300d\u3067\u3001\u53c2\u7167\u3057\u306a\u3044\u306a\u3089static\u306b\u3067\u304d\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306f\u3001\u540c\u3058\u30af\u30e9\u30b9\u5185\u306b\u540c\u3058\u540d\u524d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8907\u6570\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u5f15\u6570\u306e\u578b\u30fb\u500b\u6570\u30fb\u9806\u5e8f\u306e\u5c11\u306a\u304f\u3068\u30821\u3064\u304c\u7570\u306a\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070calculateTax(int price)\u3068calculateTax(int price, double taxRate)\u306e\u3088\u3046\u306b\u3001\u5f15\u6570\u306e\u9055\u3044\u3067\u540c\u540d\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u5206\u3051\u3089\u308c\u307e\u3059\u3002\u623b\u308a\u5024\u306e\u578b\u3060\u3051\u304c\u9055\u3046\u5834\u5408\u306f\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306b\u306a\u3089\u305a\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306f\u3069\u3046\u3084\u3063\u3066\u4f5c\u308a\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001\u5404\u30e1\u30bd\u30c3\u30c9\u304c\u300c\u81ea\u5206\u81ea\u8eab\uff08this\uff09\u300d\u3092\u8fd4\u3059\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u300creturn this;\u300d\u3068\u66f8\u304f\u3053\u3068\u3067\u3001\u547c\u3073\u51fa\u3057\u5143\u306f\u8fd4\u3063\u3066\u304d\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066\u3055\u3089\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u7d9a\u3051\u3089\u308c\u307e\u3059\u3002StringBuilder\u3084Stream API\u306e\u3088\u3046\u306a\u5b9f\u52d9\u3067\u3088\u304f\u4f7f\u3046\u30af\u30e9\u30b9\u306f\u6700\u521d\u304b\u3089\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u5bfe\u5fdc\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u81ea\u4f5c\u30af\u30e9\u30b9\u3067\u3082\u540c\u3058\u8a2d\u8a08\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u5f15\u6570\u3068\u623b\u308a\u5024\u306e\u9055\u3044\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u5f15\u6570\uff08\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u306f\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3059\u30c7\u30fc\u30bf\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u300c\u5165\u529b\u300d\u3067\u3059\u3002\u623b\u308a\u5024\u306f\u30e1\u30bd\u30c3\u30c9\u304c\u51e6\u7406\u3057\u305f\u7d50\u679c\u3092\u547c\u3073\u51fa\u3057\u5143\u306b\u8fd4\u3059\u30c7\u30fc\u30bf\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u300c\u51fa\u529b\u300d\u3067\u3059\u3002\u4f8b\u3048\u3070\u300ccalculateTax(int price)\u300d\u3067\u306f\u3001price\u304c\u5f15\u6570\uff08\u5165\u529b\uff09\u3067\u3001return\u6587\u3067\u8fd4\u3059\u6d88\u8cbb\u7a0e\u984d\u304c\u623b\u308a\u5024\uff08\u51fa\u529b\uff09\u3067\u3059\u3002\u623b\u308a\u5024\u304c\u306a\u3044\u5834\u5408\u306fvoid\u3001\u5f15\u6570\u304c\u4e0d\u8981\u306a\u5834\u5408\u306f\u62ec\u5f27\u5185\u3092\u7a7a\u306b\u3057\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Java\u3067\u306f\u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3001\u4f8b\u5916\uff08Exception\uff09\u3092\u30b9\u30ed\u30fc\u3057\u3066\u547c\u3073\u51fa\u3057\u5143\u306b\u901a\u77e5\u3057\u307e\u3059\u3002void\u30e1\u30bd\u30c3\u30c9\u3067\u51e6\u7406\u306e\u6210\u5426\u3092\u4f1d\u3048\u308b\u306b\u306f\u3001\u5931\u6557\u6642\u306bRuntimeException\u3084\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092throw\u3057\u307e\u3059\u3002\u547c\u3073\u51fa\u3057\u5143\u3067\u306ftry-catch\u30d6\u30ed\u30c3\u30af\u3067\u4f8b\u5916\u3092\u6355\u6349\u3057\u3066\u51e6\u7406\u3057\u307e\u3059\u3002boolean\u623b\u308a\u5024\u3067true\/false\u3092\u8fd4\u3059\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u5931\u6557\u306e\u7406\u7531\u304c\u4f1d\u3048\u3089\u308c\u306a\u3044\u305f\u3081\u3001\u696d\u52d9\u30ed\u30b8\u30c3\u30af\u306e\u4f8b\u5916\u306b\u306f\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u30e1\u30bd\u30c3\u30c9\u8a2d\u8a08\u3067\u3088\u304f\u3042\u308b\u5931\u6557\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u4ee3\u8868\u7684\u306a\u5931\u6557\u30d1\u30bf\u30fc\u30f3\u306f4\u3064\u3042\u308a\u307e\u3059\u3002\u2460\u30e1\u30bd\u30c3\u30c9\u304c\u9577\u3059\u304e\u308b\uff081\u30e1\u30bd\u30c3\u30c9\u304c100\u884c\u4ee5\u4e0a\u306b\u306a\u308b\u3068\u5206\u5272\u304c\u5fc5\u8981\uff09\u3001\u24611\u3064\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u8907\u6570\u306e\u8cac\u4efb\u3092\u6301\u305f\u305b\u308b\uff08\u8a08\u7b97\uff0b\u4fdd\u5b58\uff0b\u9001\u4fe1\u30921\u30e1\u30bd\u30c3\u30c9\u306b\u66f8\u304f\uff09\u3001\u2462\u5f15\u6570\u304c\u591a\u3059\u304e\u308b\uff084\u500b\u4ee5\u4e0a\u306b\u306a\u3063\u305f\u3089\u30d1\u30e9\u30e1\u30fc\u30bf\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5316\u3092\u691c\u8a0e\uff09\u3001\u2463\u610f\u5473\u306e\u306a\u3044\u540d\u524d\u306b\u3059\u308b\uff08process\u3001doSomething\u7b49\uff09\u3002Claude Code\u306b\u30b3\u30fc\u30c9\u3092\u898b\u305b\u3066\u300c\u6539\u5584\u70b9\u3092\u6307\u6458\u3057\u3066\u300d\u3068\u4f9d\u983c\u3059\u308b\u3068\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u691c\u51fa\u3057\u3066\u6539\u5584\u63d0\u6848\u3057\u3066\u304f\u308c\u307e\u3059\u3002\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u8a18\u4e8b\u306e\u5185\u5bb9 01Java\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u4f55\u304b\uff08\u95a2\u6570\u3068\u306e\u9055\u3044\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u3067\u306e\u5f79\u5272\uff09 02\u30e1\u30bd\u30c3\u30c9\u306e\u5b9a\u7fa9\u65b9\u6cd5\uff08\u623b\u308a\u5024\u306e\u578b\u30fb\u30e1\u30bd\u30c3\u30c9\u540d\u30fb\u5f15\u6570\u306e\u66f8\u304d\u65b9\uff09 03\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u65b9\uff08\u540c\u30af\u30e9\u30b9\u5185\u30fb\u5225\u30af\u30e9\u30b9\u304b\u3089\uff09 04\u5f15\u6570\u306e\u4f7f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18318,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"sitemap_hide":"","_veu_custom_css":"","vkexunit_cta_each_option":"","footnotes":"","rank_math_description":"Java\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b8c\u5168\u89e3\u8aac\u3002\u5b9a\u7fa9\u65b9\u6cd5\u30fb\u547c\u3073\u51fa\u3057\u30fb\u5f15\u6570\u30fb\u623b\u308a\u5024\u30fboverload\u30fbstatic\u30e1\u30bd\u30c3\u30c9\u30fb\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u30fbClaude Code\u3067\u306e\u81ea\u52d5\u5316\u307e\u3067\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u5411\u3051\u306b\u5b9f\u52d9\u30ec\u30d9\u30eb\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002","rank_math_focus_keyword":"Java 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