{"id":18327,"date":"2026-07-18T22:05:19","date_gmt":"2026-07-18T13:05:19","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=18327"},"modified":"2026-07-18T22:06:18","modified_gmt":"2026-07-18T13:06:18","slug":"cc-java-array","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-java-array\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011Java\u914d\u5217\u5b8c\u5168\u30ac\u30a4\u30c9\uff5c\u5ba3\u8a00\u30fb\u521d\u671f\u5316\u30fb\u8981\u7d20\u64cd\u4f5c\u30fb\u591a\u6b21\u5143\u914d\u5217\u30fbArrayList\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-array-1.jpg\" alt=\"Java\u914d\u5217\u306e\u4f7f\u3044\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9\" 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>\u914d\u5217\u3068\u306f\u4f55\u304b\uff08\u30ea\u30b9\u30c8\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u9055\u3044\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>\u914d\u5217\u306e\u5ba3\u8a00\u65b9\u6cd5\uff08\u578b[] \u5909\u6570\u540d\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>\u914d\u5217\u306e\u521d\u671f\u5316\uff08new\u3068\u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\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>\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/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>\u914d\u5217\u306e\u8981\u7d20\u6570\uff08length\uff09<\/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>for\u6587\u3068for-each\u6587\u3067\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406<\/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>\u591a\u6b21\u5143\u914d\u5217\uff082\u6b21\u5143\u914d\u5217\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>\u914d\u5217\u306e\u30bd\u30fc\u30c8\uff08Arrays.sort\uff09<\/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>ArrayList\u3068\u306e\u9055\u3044\u30fb\u4f7f\u3044\u5206\u3051<\/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\u3067\u306e\u914d\u5217\u6d3b\u7528\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\u3067\u914d\u5217\u51e6\u7406\u3092\u81ea\u52d5\u5316<\/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\u914d\u5217\u3063\u3066\u3069\u3046\u66f8\u304f\u306e\uff1f\u300d\u300c\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u9055\u3044\u304c\u5206\u304b\u3089\u306a\u3044\u300d\u300cArrayList\u3068\u4f55\u304c\u9055\u3046\u306e\u304b\u6df7\u4e71\u3057\u3066\u3044\u308b\u300d\u2014\u2014Java\u3092\u5b66\u3076\u4e0a\u3067<strong>\u914d\u5217\uff08Array\uff09<\/strong>\u306f\u6700\u521d\u306e\u58c1\u306b\u306a\u308a\u3084\u3059\u3044\u30c6\u30fc\u30de\u3067\u3059\u3002\u3057\u304b\u3057\u57fa\u672c\u3092\u4e00\u5ea6\u62bc\u3055\u3048\u3066\u3057\u307e\u3048\u3070\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u30b3\u30a2\u3068\u3057\u3066\u4f55\u5ea6\u3082\u6d3b\u7528\u3067\u304d\u308b\u91cd\u8981\u306a\u77e5\u8b58\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Java\u914d\u5217\u306e<strong>\u5ba3\u8a00\u30fb\u521d\u671f\u5316\u30fb\u8981\u7d20\u30a2\u30af\u30bb\u30b9\u30fb\u8981\u7d20\u6570\u53d6\u5f97\u30fbfor\u6587\u7e70\u308a\u8fd4\u3057\u30fb\u591a\u6b21\u5143\u914d\u5217\u30fb\u30bd\u30fc\u30c8\u30fbArrayList\u3068\u306e\u6bd4\u8f03<\/strong>\u307e\u3067\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u30ec\u30d9\u30eb\u3067\u5b8c\u5168\u89e3\u8aac\u3057\u307e\u3059\u3002\u3055\u3089\u306b<strong>Claude Code\u3092\u4f7f\u3063\u305f\u914d\u5217\u51e6\u7406\u306e\u81ea\u52d5\u5316<\/strong>\u307e\u3067\u8e0f\u307f\u8fbc\u307f\u3001\u5b9f\u696d\u52d9\u3078\u306e\u5fdc\u7528\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\u914d\u5217\u306f\u300c\u56fa\u5b9a\u9577\u306e\u30c7\u30fc\u30bf\u68da\u300d\u3067\u3059\u3002\u68da\u306e\u6570\u3092\u6700\u521d\u306b\u6c7a\u3081\u3066\u3001\u305d\u3053\u306b\u756a\u53f7\u4ed8\u304d\u3067\u7269\u3092\u5165\u308c\u3066\u3044\u304f\u30a4\u30e1\u30fc\u30b8\u3002\u3053\u306e\u30a4\u30e1\u30fc\u30b8\u3055\u3048\u63b4\u3081\u308c\u3070\u3001\u5ba3\u8a00\u304b\u3089\u591a\u6b21\u5143\u914d\u5217\u307e\u3067\u4e00\u6c17\u306b\u7406\u89e3\u3067\u304d\u307e\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\">\u4eca\u65e5\u306fJava\u914d\u5217\u3092\u300c\u30bc\u30ed\u304b\u3089\u4f7f\u3048\u308b\u30ec\u30d9\u30eb\u300d\u307e\u3067\u4e00\u7dd2\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u30b3\u30fc\u30c9\u4f8b\u306f\u5168\u3066\u5b9f\u969b\u306b\u52d5\u304f\u3082\u306e\u3092\u7528\u610f\u3057\u307e\u3057\u305f\u3002\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u65b9\u3082\u3001\u7528\u8a9e\u306e\u610f\u5473\u3092\u90fd\u5ea6\u89e3\u8aac\u3057\u306a\u304c\u3089\u9032\u3081\u308b\u306e\u3067\u5b89\u5fc3\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/div>\n<\/div>\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>\u914d\u5217\u306e\u5ba3\u8a00\u30fb\u521d\u671f\u5316<\/strong>\u306e2\u30d1\u30bf\u30fc\u30f3\uff08new\u3068\u30ea\u30c6\u30e9\u30eb\uff09\u3092\u5b8c\u5168\u7406\u89e3<\/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>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u30fb\u8981\u7d20\u6570\uff08length\uff09<\/strong>\u306e\u4f7f\u3044\u65b9<\/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>for\u6587\u30fbfor-each\u6587<\/strong>\u3067\u306e\u7e70\u308a\u8fd4\u3057\u51e6\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>2\u6b21\u5143\u914d\u5217<\/strong>\uff08\u884c\u5217\u30c7\u30fc\u30bf\u306e\u6271\u3044\u65b9\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>Arrays.sort<\/strong>\u3067\u306e\u30bd\u30fc\u30c8\u65b9\u6cd5<\/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>ArrayList\u3068\u306e\u9055\u3044<\/strong>\u3068\u4f7f\u3044\u5206\u3051\u306e\u5224\u65ad\u57fa\u6e96<\/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\u305f\u696d\u52d9\u3067\u306e\u914d\u5217\u81ea\u52d5\u5316<\/strong><\/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-array&#038;blog_slug=cc-java-array\" 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-array&#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 ARRAY<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u3068\u306f\u4f55\u304b\uff08\u30ea\u30b9\u30c8\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u9055\u3044\uff09<\/span>\n  <span class=\"section-desc\">\u300c\u30c7\u30fc\u30bf\u306e\u68da\u300d\u3092\u30a4\u30e1\u30fc\u30b8\u3059\u308b\u3068\u3059\u3079\u3066\u304c\u5206\u304b\u308b<\/span>\n<\/h2>\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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u914d\u5217\uff08Array\uff09<\/strong>\uff1aJava\u3067\u540c\u3058\u30c7\u30fc\u30bf\u578b\u306e\u8907\u6570\u306e\u5024\u3092\u4e00\u3064\u306e\u5909\u6570\u306b\u307e\u3068\u3081\u3066\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u30c7\u30fc\u30bf\u69cb\u9020\u3002\u68da\u306e\u756a\u53f7\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff09\u3067\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3002\u914d\u5217\u306e\u30b5\u30a4\u30ba\u306f\u4f5c\u6210\u6642\u306b\u56fa\u5b9a\u3055\u308c\u3001\u5f8c\u304b\u3089\u5909\u66f4\u3067\u304d\u306a\u3044\u306e\u304c\u6700\u5927\u306e\u7279\u5fb4\u3002<\/p><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u3092\u4e00\u8a00\u3067\u8aac\u660e\u3059\u308b\u3068\u3001<strong>\u300c\u540c\u3058\u7a2e\u985e\u306e\u30c7\u30fc\u30bf\u3092\u756a\u53f7\u4ed8\u304d\u3067\u4e26\u3079\u3066\u7ba1\u7406\u3059\u308b\u7bb1\u300d<\/strong>\u3067\u3059\u3002\u4f8b\u3048\u3070\u30015\u4eba\u306e\u793e\u54e1\u306e\u70b9\u6570\u3092\u7ba1\u7406\u3057\u305f\u3044\u5834\u5408\u3001\u5909\u6570\u30925\u500b\u4f5c\u308b\u3088\u308a\u3082\u30015\u67a0\u306e\u914d\u5217\u30921\u500b\u4f5c\u308b\u65b9\u304c\u30b3\u30fc\u30c9\u304c\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u65b9\u6cd5<\/th><th>\u5909\u6570\u306e\u66f8\u304d\u65b9<\/th><th>\u8981\u7d20\u6570\u304c\u5897\u3048\u305f\u3068\u304d<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u5909\u6570\u3092\u500b\u5225\u306b\u5ba3\u8a00<\/td><td>int score1, score2, score3 ...<\/td><td>\u5909\u6570\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u3042\u308a<\/td><\/tr>\n<tr><td>\u914d\u5217\u3092\u4f7f\u3046<\/td><td>int[] scores = new int[5]<\/td><td>\u30b5\u30a4\u30ba\u5909\u66f4\uff08\u203b\u5f8c\u8ff0\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306f\u30c7\u30fc\u30bf\u3092\u300c\u9023\u7d9a\u3057\u305f\u30e1\u30e2\u30ea\u9818\u57df\u300d\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3067\u77ac\u6642\u306b\u7279\u5b9a\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<strong>\u9ad8\u901f\u306a\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9<\/strong>\u304c\u53ef\u80fd\u306b\u306a\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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/strong>\uff1a\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u5272\u308a\u632f\u3089\u308c\u305f\u756a\u53f7\uff08\u6dfb\u3048\u5b57\uff09\u3002Java\u306e\u914d\u5217\u306f0\u59cb\u307e\u308a\uff080\u30aa\u30ea\u30b8\u30f3\uff09\u3067\u3001\u6700\u521d\u306e\u8981\u7d20\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b90\u30012\u756a\u76ee\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u3068\u306a\u308b\u3002\u68da\u306e\u300c\u756a\u53f7\u672d\u300d\u306b\u76f8\u5f53\u3002<\/p><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">1-1. \u914d\u5217\u30fb\u30ea\u30b9\u30c8\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u9055\u3044<\/h3>\n\n\n\n<table>\n<thead><tr><th>\u30c7\u30fc\u30bf\u69cb\u9020<\/th><th>\u7279\u5fb4<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u914d\u5217\uff08Array\uff09<\/td><td>\u56fa\u5b9a\u9577\u30fb\u9ad8\u901f\u30a2\u30af\u30bb\u30b9\u30fb\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578bOK<\/td><td>\u8981\u7d20\u6570\u304c\u6c7a\u307e\u3063\u3066\u3044\u308b\u30c7\u30fc\u30bf<\/td><\/tr>\n<tr><td>ArrayList<\/td><td>\u53ef\u5909\u9577\u30fb\u8ffd\u52a0\u524a\u9664\u304c\u5bb9\u6613\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u307f<\/td><td>\u8981\u7d20\u6570\u304c\u5909\u308f\u308b\u30c7\u30fc\u30bf<\/td><\/tr>\n<tr><td>LinkedList<\/td><td>\u8ffd\u52a0\u524a\u9664\u304c\u9ad8\u901f\u30fb\u30e9\u30f3\u30c0\u30e0\u30a2\u30af\u30bb\u30b9\u306f\u9045\u3044<\/td><td>\u983b\u7e41\u306a\u633f\u5165\u30fb\u524a\u9664<\/td><\/tr>\n<tr><td>HashSet<\/td><td>\u91cd\u8907\u306a\u3057\u30fb\u9806\u5e8f\u306a\u3057<\/td><td>\u30e6\u30cb\u30fc\u30af\u30c7\u30fc\u30bf\u306e\u7ba1\u7406<\/td><\/tr>\n<tr><td>HashMap<\/td><td>\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2<\/td><td>\u8f9e\u66f8\u30fb\u9023\u60f3\u914d\u5217\u7684\u306a\u7528\u9014<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u3067\u306f\u3001\u914d\u5217\u3068ArrayList\u304c\u6700\u3082\u983b\u7e41\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<strong>\u300c\u8981\u7d20\u6570\u304c\u6700\u521d\u304b\u3089\u6c7a\u307e\u3063\u3066\u3044\u308b\uff1d\u914d\u5217\u300d\u300c\u8981\u7d20\u6570\u304c\u52d5\u7684\u306b\u5909\u308f\u308b\uff1dArrayList\u300d<\/strong>\u3068\u3044\u3046\u306e\u304c\u57fa\u672c\u306e\u4f7f\u3044\u5206\u3051\u3067\u3059\u3002<\/p>\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\">\u300c\u914d\u5217\u304bArrayList\u304b\u3069\u3061\u3089\u3092\u4f7f\u3048\u3070\u3044\u3044\u306e\u304b\u300d\u306f\u521d\u5b66\u8005\u304c\u3088\u304f\u8ff7\u3046\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u30b7\u30f3\u30d7\u30eb\u306a\u5224\u65ad\u57fa\u6e96\u306f\u300c\u4ef6\u6570\u304c\u6700\u521d\u304b\u3089\u6c7a\u307e\u3063\u3066\u3044\u308b\u304b\u5426\u304b\u300d\u3002\u66dc\u65e5\uff087\u4ef6\uff09\u30fb\u6708\uff0812\u4ef6\uff09\u306f\u914d\u5217\u3001\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u8ffd\u52a0\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306fArrayList\u304c\u9069\u3057\u3066\u3044\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">DECLARATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u306e\u5ba3\u8a00\u65b9\u6cd5\uff08\u578b[] \u5909\u6570\u540d\uff09<\/span>\n  <span class=\"section-desc\">\u578b\u3068\u5909\u6570\u540d\u3092\u6b63\u3057\u304f\u66f8\u304f\u3060\u3051\u3067OK<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u3067\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u306b\u306f\u3001<strong>\u30c7\u30fc\u30bf\u578b\u306e\u5f8c\u306b[]\uff08\u89d2\u62ec\u5f27\uff09<\/strong>\u3092\u4ed8\u3051\u307e\u3059\u3002\u5ba3\u8a00\u306f\u3042\u304f\u307e\u3067\u3082\u300c\u3053\u306e\u5909\u6570\u306f\u914d\u5217\u3092\u5165\u308c\u308b\u5909\u6570\u3067\u3059\u300d\u3068\u3044\u3046\u5ba3\u8a00\u3067\u3042\u308a\u3001\u3053\u306e\u6bb5\u968e\u3067\u306f\u30e1\u30e2\u30ea\u306e\u78ba\u4fdd\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u57fa\u672c\u7684\u306a\u914d\u5217\u306e\u5ba3\u8a00\nint[] scores;           \/\/ int\u578b\u306e\u914d\u5217\u5909\u6570\u3092\u5ba3\u8a00\nString[] names;         \/\/ String\u578b\u306e\u914d\u5217\u5909\u6570\u3092\u5ba3\u8a00\ndouble[] prices;        \/\/ double\u578b\u306e\u914d\u5217\u5909\u6570\u3092\u5ba3\u8a00\nboolean[] flags;        \/\/ boolean\u578b\u306e\u914d\u5217\u5909\u6570\u3092\u5ba3\u8a00\n\n\/\/ \u5225\u306e\u66f8\u304d\u65b9\uff08C\u8a00\u8a9e\u30b9\u30bf\u30a4\u30eb\uff09\nint scores[];           \/\/ \u3053\u3061\u3089\u3082\u6709\u52b9\u3060\u304cJava\u3067\u306f\u975e\u63a8\u5968\n<\/pre><\/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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b<\/strong>\uff1aJava\u306e\u57fa\u672c\u7684\u306a\u30c7\u30fc\u30bf\u578b\u3002int\uff08\u6574\u6570\uff09\u3001double\uff08\u5c0f\u6570\uff09\u3001boolean\uff08\u771f\u507d\u5024\uff09\u3001char\uff08\u6587\u5b57\uff09\u3001byte\u3001short\u3001long\u3001float\u306e8\u7a2e\u985e\u3002\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u306a\u304f\u3001\u5024\u305d\u306e\u3082\u306e\u3092\u76f4\u63a5\u683c\u7d0d\u3059\u308b\u3002\u914d\u5217\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3069\u3061\u3089\u3067\u3082\u4f7f\u3048\u308b\u3002<\/p><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306e\u5ba3\u8a00\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u578b\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\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>int[]<\/strong>\uff1a\u6574\u6570\u306e\u914d\u5217\uff08\u793e\u54e1\u756a\u53f7\u3001\u6570\u91cf\u3001\u70b9\u6570\u306a\u3069\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>String[]<\/strong>\uff1a\u6587\u5b57\u5217\u306e\u914d\u5217\uff08\u540d\u524d\u3001\u4f4f\u6240\u3001\u30ab\u30c6\u30b4\u30ea\u306a\u3069\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>double[]<\/strong>\uff1a\u5c0f\u6570\u306e\u914d\u5217\uff08\u4fa1\u683c\u3001\u5272\u5408\u3001\u5ea7\u6a19\u306a\u3069\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>boolean[]<\/strong>\uff1a\u771f\u507d\u5024\u306e\u914d\u5217\uff08\u30d5\u30e9\u30b0\u7ba1\u7406\u3001\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u72b6\u614b\u306a\u3069\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>Object[]<\/strong>\uff1a\u4efb\u610f\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u914d\u5217\uff08\u6c4e\u7528\u7684\u306b\u4f7f\u3046\u5834\u5408\uff09<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">\u547d\u540d\u898f\u5247<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">Java\u914d\u5217\u306e\u5909\u6570\u540d\u306f\u6163\u7fd2\u3068\u3057\u3066<strong>\u8907\u6570\u5f62<\/strong>\u306b\u3059\u308b\u306e\u304c\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306e\u7b2c\u4e00\u6b69\u3067\u3059\u3002score \u3088\u308a scores\u3001name \u3088\u308a names\u3001price \u3088\u308a prices \u306e\u3088\u3046\u306b\u8907\u6570\u5f62\u306b\u3059\u308b\u3053\u3068\u3067\u300c\u3053\u308c\u306f\u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u6301\u3064\u914d\u5217\u300d\u3068\u4e00\u76ee\u3067\u5206\u304b\u308a\u307e\u3059\u3002<\/p><\/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\">\u5ba3\u8a00\u3068\u521d\u671f\u5316\u3092\u6df7\u540c\u3057\u3066\u3057\u307e\u3046\u65b9\u304c\u591a\u3044\u3067\u3059\u3002\u5ba3\u8a00\u306f\u300c\u3053\u306e\u5909\u6570\u3092\u4f7f\u3044\u307e\u3059\u300d\u3068\u3044\u3046\u5ba3\u8a00\u3060\u3051\u3002\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u30b9\u30da\u30fc\u30b9\u3092\u78ba\u4fdd\u3059\u308b\u306e\u304c\u521d\u671f\u5316\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">INITIALIZATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u306e\u521d\u671f\u5316\uff08new\u3068\u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\uff09<\/span>\n  <span class=\"section-desc\">2\u3064\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3044\u5206\u3051\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u914d\u5217\u306e\u521d\u671f\u5316\u306b\u306f<strong>2\u3064\u306e\u30d1\u30bf\u30fc\u30f3<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002\u300cnew\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u65b9\u6cd5\u300d\u3068\u300c\u30ea\u30c6\u30e9\u30eb\uff08\u521d\u671f\u5024\uff09\u3092\u76f4\u63a5\u66f8\u304f\u65b9\u6cd5\u300d\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u6700\u7d42\u7684\u306b\u540c\u3058\u914d\u5217\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u4f7f\u3046\u5834\u9762\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3-1. new\u6f14\u7b97\u5b50\u306b\u3088\u308b\u521d\u671f\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">new\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3068\u3001\u6307\u5b9a\u3057\u305f\u30b5\u30a4\u30ba\u306e\u914d\u5217\u3092\u78ba\u4fdd\u3057\u3001\u5404\u8981\u7d20\u306b\u306f<strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\uff08int\u578b\u306a\u30890\u3001boolean\u578b\u306a\u3089false\u3001String\u578b\u306a\u3089null\uff09<\/strong>\u304c\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u3002\u8981\u7d20\u6570\u304c\u6c7a\u307e\u3063\u3066\u3044\u308b\u304c\u521d\u671f\u5024\u304c\u672a\u5b9a\u306e\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ new\u6f14\u7b97\u5b50\u3067\u914d\u5217\u3092\u521d\u671f\u5316\uff08\u30b5\u30a4\u30ba5\u306eint\u914d\u5217\uff09\nint[] scores = new int[5];\n\/\/ scores[0]=0, scores[1]=0, scores[2]=0, scores[3]=0, scores[4]=0\n\n\/\/ \u5ba3\u8a00\u3068\u521d\u671f\u5316\u3092\u5206\u3051\u3066\u66f8\u304f\u3053\u3068\u3082\u53ef\u80fd\nint[] scores;\nscores = new int[5];   \/\/ \u5f8c\u304b\u3089\u521d\u671f\u5316\n\n\/\/ \u5404\u8981\u7d20\u306b\u5024\u3092\u4ee3\u5165\nscores[0] = 85;\nscores[1] = 92;\nscores[2] = 78;\nscores[3] = 95;\nscores[4] = 88;\n<\/pre><\/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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>new\u6f14\u7b97\u5b50<\/strong>\uff1aJava\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u30e1\u30e2\u30ea\u9818\u57df\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3002\u300cnew int[5]\u300d\u306f\u300cint\u578b\u306e\u5024\u30925\u500b\u683c\u7d0d\u3067\u304d\u308b\u9818\u57df\u3092\u78ba\u4fdd\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u3044\u3046\u6307\u793a\u3002Java\u3067\u306f\u914d\u5217\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6271\u3044\u306b\u306a\u308b\u305f\u3081\u3001new\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002<\/p><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3-2. \u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\uff08\u521d\u671f\u5024\u3092\u76f4\u63a5\u66f8\u304f\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u521d\u671f\u5024\u304c\u6700\u521d\u304b\u3089\u5206\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001<strong>\u4e2d\u62ec\u5f27{}\u306e\u4e2d\u306b\u5024\u3092\u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u4e26\u3079\u308b<\/strong>\u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\u304c\u4fbf\u5229\u3067\u3059\u3002\u30b5\u30a4\u30ba\u306f\u81ea\u52d5\u7684\u306b\u8981\u7d20\u6570\u306b\u5408\u308f\u305b\u3089\u308c\u308b\u305f\u3081\u3001new\u6f14\u7b97\u5b50\u3082\u30b5\u30a4\u30ba\u6307\u5b9a\u3082\u4e0d\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;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\uff08\u521d\u671f\u5024\u3092\u76f4\u63a5\u6307\u5b9a\uff09\nint[] scores = {85, 92, 78, 95, 88};\n\n\/\/ String\u578b\u306e\u4f8b\nString[] weekdays = {\"\u6708\", \"\u706b\", \"\u6c34\", \"\u6728\", \"\u91d1\", \"\u571f\", \"\u65e5\"};\n\n\/\/ double\u578b\u306e\u4f8b\ndouble[] taxes = {0.08, 0.10};\n\n\/\/ \u5ba3\u8a00\u6e08\u307f\u306e\u5909\u6570\u306b\u5f8c\u304b\u3089\u30ea\u30c6\u30e9\u30eb\u4ee3\u5165\u306f\u3067\u304d\u306a\u3044\nint[] scores;\nscores = {85, 92, 78};   \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff01\n\n\/\/ \u5f8c\u304b\u3089\u4ee3\u5165\u3059\u308b\u5834\u5408\u306fnew\u304c\u5fc5\u8981\nscores = new int[]{85, 92, 78};   \/\/ \u3053\u3061\u3089\u306fOK\n<\/pre><\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:20px;\">&#9888;&#65039;<\/span><strong style=\"color:#dc2626;font-size:16px;\">\u3088\u304f\u3042\u308b\u30df\u30b9<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u5ba3\u8a00\u6e08\u307f\u306e\u914d\u5217\u5909\u6570\u306b\u30ea\u30c6\u30e9\u30eb\uff08{...}\uff09\u3060\u3051\u3067\u4ee3\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u5f8c\u304b\u3089\u4ee3\u5165\u3059\u308b\u5834\u5408\u306f\u5fc5\u305a\u300cnew int[]{...}\u300d\u306e\u3088\u3046\u306b new \u578b[] \u3092\u4ed8\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u5ba3\u8a00\u306e\u307f<\/strong><br><span style=\"font-size:12px;\">int[] scores;<br>\u5909\u6570\u306e\u67a0\u3060\u3051\u4f5c\u308b<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>new\u521d\u671f\u5316<\/strong><br><span style=\"font-size:12px;\">new int[5]<br>\u7a7a\u306e\u68da\u3092\u78ba\u4fdd<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u8981\u7d20\u4ee3\u5165<\/strong><br><span style=\"font-size:12px;\">scores[0]=85<br>\u5404\u68da\u306b\u5024\u3092\u5165\u308c\u308b<\/span><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\u306f\u4e0a\u8a18\u30d5\u30ed\u30fc\u3092\u4e00\u6c17\u306b\u884c\u3046\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3067\u3059\u3002\u5024\u304c\u6700\u521d\u304b\u3089\u6c7a\u307e\u3063\u3066\u3044\u308b\u306a\u3089\u7a4d\u6975\u7684\u306b\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">ELEMENT ACCESS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9<\/span>\n  <span class=\"section-desc\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u59cb\u307e\u308a\u2014\u2014\u3053\u3053\u3092\u9593\u9055\u3048\u308b\u3068\u5b9f\u884c\u6642\u30a8\u30e9\u30fc<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306b\u306f\u3001\u5909\u6570\u540d\u306e\u5f8c\u306b<strong>\u89d2\u62ec\u5f27[]\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7<\/strong>\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<strong>\u91cd\u8981\u306a\u306e\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u304b\u3089\u59cb\u307e\u308b<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002\u8981\u7d20\u304c5\u500b\u306e\u914d\u5217\u306a\u3089\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u301c4\u3067\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">int[] scores = {85, 92, 78, 95, 88};\n\n\/\/ \u8981\u7d20\u306e\u53d6\u5f97\nSystem.out.println(scores[0]);   \/\/ 85\uff08\u6700\u521d\u306e\u8981\u7d20\uff09\nSystem.out.println(scores[1]);   \/\/ 92\uff082\u756a\u76ee\u306e\u8981\u7d20\uff09\nSystem.out.println(scores[4]);   \/\/ 88\uff08\u6700\u5f8c\u306e\u8981\u7d20\uff09\n\n\/\/ \u8981\u7d20\u306e\u5909\u66f4\nscores[2] = 80;\nSystem.out.println(scores[2]);   \/\/ 80\uff08\u5909\u66f4\u5f8c\uff09\n\n\/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u3082\u53ef\u80fd\nint idx = 3;\nSystem.out.println(scores[idx]);  \/\/ 95\n<\/pre><\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:20px;\">&#9888;&#65039;<\/span><strong style=\"color:#dc2626;font-size:16px;\">ArrayIndexOutOfBoundsException\uff08\u914d\u5217\u306e\u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\uff09<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u8981\u7d20\u65705\u306e\u914d\u5217\u306b\u5bfe\u3057\u3066scores[5]\u3092\u53c2\u7167\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u5b9f\u884c\u6642\u306b\u300cArrayIndexOutOfBoundsException\u300d\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306fJava\u3067\u6700\u3082\u983b\u7e41\u306b\u906d\u9047\u3059\u308b\u30a8\u30e9\u30fc\u306e1\u3064\u3067\u3059\u3002\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u304b\u3089\u59cb\u307e\u308a\u3001\u6700\u5927\u5024\u306f\u8981\u7d20\u6570-1\u300d\u3092\u5fc5\u305a\u899a\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>ArrayIndexOutOfBoundsException<\/strong>\uff1a\u914d\u5217\u306e\u6709\u52b9\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u304d\u306b\u767a\u751f\u3059\u308bJava\u306e\u5b9f\u884c\u6642\u4f8b\u5916\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3067\u306f\u306a\u304f\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u306a\u306e\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u52d5\u3044\u3066\u3044\u308b\u6700\u4e2d\u306b\u7a81\u7136\u30af\u30e9\u30c3\u30b7\u30e5\u3059\u308b\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u5883\u754c\u30c1\u30a7\u30c3\u30af\u3092\u6020\u308b\u3068\u767a\u751f\u3057\u3084\u3059\u3044\u3002<\/p><\/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\">\u300c0\u59cb\u307e\u308a\u300d\u306f\u6700\u521d\u306f\u76f4\u611f\u3068\u53cd\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u30021\u756a\u76ee\u306e\u8981\u7d20\u304c[0]\u3068\u3044\u3046\u306e\u306f\u3001C\u8a00\u8a9e\u306e\u4f1d\u7d71\u3092\u5f15\u304d\u7d99\u3044\u3067\u3044\u307e\u3059\u3002\u300c\u914d\u5217\u306f0\u304b\u3089\u6570\u3048\u308b\u300d\u3092\u8133\u306b\u5237\u308a\u8fbc\u3080\u65b9\u6cd5\u3068\u3057\u3066\u3001\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f\u5148\u982d\u304b\u3089\u306e\u8ddd\u96e2\uff08\u30aa\u30d5\u30bb\u30c3\u30c8\uff09\u300d\u3068\u899a\u3048\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u3044\u3067\u3059\u3002\u5148\u982d\u8981\u7d20\u81ea\u4f53\u306f\u8ddd\u96e20\u306a\u306e\u3067[0]\u306b\u306a\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">LENGTH<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u306e\u8981\u7d20\u6570\uff08length\uff09<\/span>\n  <span class=\"section-desc\">scores.length \u3067\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001<strong>\u914d\u5217\u5909\u6570\u540d.length<\/strong> \u3092\u4f7f\u3044\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u306a\u304f\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09\u306a\u306e\u3067\u3001\u62ec\u5f27()\u306f\u4e0d\u8981\u3067\u3059\u3002\u3053\u308c\u3092\u77e5\u3089\u306a\u3044\u3068for\u6587\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u4e0a\u9650\u3092\u66f8\u304f\u306e\u306b\u56f0\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">int[] scores = {85, 92, 78, 95, 88};\n\n\/\/ \u8981\u7d20\u6570\u306e\u53d6\u5f97\nSystem.out.println(scores.length);   \/\/ 5\n\n\/\/ \u6700\u5f8c\u306e\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\uff08scores.length - 1 \u304c\u30dd\u30a4\u30f3\u30c8\uff09\nSystem.out.println(scores[scores.length - 1]);   \/\/ 88\n\n\/\/ String\u914d\u5217\u306e\u5834\u5408\u3082\u540c\u3058\nString[] names = {\"\u7530\u4e2d\", \"\u9234\u6728\", \"\u5c71\u7530\"};\nSystem.out.println(names.length);    \/\/ 3\n<\/pre><\/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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>length\uff08\u30ec\u30f3\u30b0\u30b9\uff09<\/strong>\uff1a\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u8868\u3059Java\u306e\u7d44\u307f\u8fbc\u307f\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u30d7\u30ed\u30d1\u30c6\u30a3\uff09\u3002\u914d\u5217\u540d.length\u3067\u53c2\u7167\u3067\u304d\u308b\u3002\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001String\u306elength()\u306f\u30e1\u30bd\u30c3\u30c9\uff08\u62ec\u5f27\u3042\u308a\uff09\u3060\u304c\u3001\u914d\u5217\u306elength\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\uff08\u62ec\u5f27\u306a\u3057\uff09\u3068\u3044\u3046\u9055\u3044\u304c\u3042\u308b\u3002\u6df7\u540c\u3057\u3084\u3059\u3044\u306e\u3067\u6ce8\u610f\u3002<\/p><\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">length \u306e\u4f7f\u3044\u3069\u3053\u308d<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\"><strong>scores.length<\/strong>\u306ffor\u6587\u306e\u30eb\u30fc\u30d7\u4e0a\u9650\u306b\u4f7f\u3046\u306e\u304c\u6700\u3082\u5178\u578b\u7684\u306a\u7528\u9014\u3067\u3059\u3002\u914d\u5217\u306e\u30b5\u30a4\u30ba\u3092\u30cf\u30fc\u30c9\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\uff08\u76f4\u66f8\u304d\uff09\u305b\u305a\u306blength\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u914d\u5217\u306e\u30b5\u30a4\u30ba\u304c\u5909\u308f\u3063\u3066\u3082for\u6587\u3092\u66f8\u304d\u76f4\u3059\u5fc5\u8981\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p><\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u60aa\u3044\u4f8b\uff1a\u30cf\u30fc\u30c9\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\nfor (int i = 0; i < 5; i++) {   \/\/ \u8981\u7d20\u6570\u304c\u5909\u308f\u3063\u305f\u3089\u4fee\u6b63\u304c\u5fc5\u8981\n    System.out.println(scores[i]);\n}\n\n\/\/ \u826f\u3044\u4f8b\uff1alength\u3092\u4f7f\u3046\nfor (int i = 0; i < scores.length; i++) {   \/\/ \u30b5\u30a4\u30ba\u304c\u5909\u308f\u3063\u3066\u3082\u4fee\u6b63\u4e0d\u8981\n    System.out.println(scores[i]);\n}\n<\/pre><\/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\">length\u3092\u4f7f\u3046\u7fd2\u6163\u306f\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\u91cd\u8981\u3067\u3059\u30025\u3068\u6c7a\u3081\u6253\u3061\u3067\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u306f\u3001\u5f8c\u304b\u3089\u8981\u7d20\u6570\u304c\u5909\u308f\u3063\u305f\u3068\u304d\u306b\u30d0\u30b0\u306e\u6e29\u5e8a\u306b\u306a\u308a\u307e\u3059\u3002\u300cmagic number\uff08\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc\uff09\u3092\u907f\u3051\u308b\u300d\u3068\u3044\u3046\u539f\u5247\u306e\u5177\u4f53\u7684\u5b9f\u8df5\u304clength\u306e\u6d3b\u7528\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">ITERATION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">for\u6587\u3068for-each\u6587\u3067\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406<\/span>\n  <span class=\"section-desc\">\u5168\u8981\u7d20\u3092\u51e6\u7406\u3059\u308b\u30eb\u30fc\u30d7\u306e\u66f8\u304d\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u5217\u306e\u5168\u8981\u7d20\u306b\u5bfe\u3057\u3066\u51e6\u7406\u3092\u884c\u3046\u306b\u306f\u3001<strong>for\u6587<\/strong>\u307e\u305f\u306f<strong>for-each\u6587\uff08\u62e1\u5f35for\u6587\uff09<\/strong>\u3092\u4f7f\u3044\u307e\u3059\u3002\u3069\u3061\u3089\u3082\u914d\u5217\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u306b\u4f7f\u3048\u307e\u3059\u304c\u3001\u4f7f\u3046\u5834\u9762\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6-1. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4ed8\u304dfor\u6587<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\uff08i\uff09\u3092\u4f7f\u3046for\u6587\u306f\u3001<strong>\u8981\u7d20\u306e\u4f4d\u7f6e\uff08\u4f55\u756a\u76ee\u304b\uff09\u3092\u4f7f\u3044\u305f\u3044\u3068\u304d<\/strong>\u3084\u3001\u4e00\u90e8\u306e\u8981\u7d20\u3060\u3051\u51e6\u7406\u3057\u305f\u3044\u3068\u304d\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">int[] scores = {85, 92, 78, 95, 88};\n\n\/\/ \u5168\u8981\u7d20\u3092\u9806\u756a\u306b\u51fa\u529b\nfor (int i = 0; i < scores.length; i++) {\n    System.out.println((i + 1) + \"\u756a\u76ee\u306e\u30b9\u30b3\u30a2: \" + scores[i]);\n}\n\/\/ \u51fa\u529b:\n\/\/ 1\u756a\u76ee\u306e\u30b9\u30b3\u30a2: 85\n\/\/ 2\u756a\u76ee\u306e\u30b9\u30b3\u30a2: 92\n\/\/ 3\u756a\u76ee\u306e\u30b9\u30b3\u30a2: 78\n\/\/ 4\u756a\u76ee\u306e\u30b9\u30b3\u30a2: 95\n\/\/ 5\u756a\u76ee\u306e\u30b9\u30b3\u30a2: 88\n\n\/\/ \u5408\u8a08\u3068\u5e73\u5747\u3092\u6c42\u3081\u308b\nint sum = 0;\nfor (int i = 0; i < scores.length; i++) {\n    sum += scores[i];\n}\ndouble average = (double) sum \/ scores.length;\nSystem.out.println(\"\u5408\u8a08: \" + sum);         \/\/ \u5408\u8a08: 438\nSystem.out.println(\"\u5e73\u5747: \" + average);     \/\/ \u5e73\u5747: 87.6\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">6-2. for-each\u6587\uff08\u62e1\u5f35for\u6587\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">for-each\u6587\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u4e0d\u8981\u306a\u5834\u5408\u306b\u3001\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b\u66f8\u3051\u307e\u3059\u3002<strong>\u300c\u5404\u8981\u7d20\u3092\u9806\u756a\u306b\u53d6\u308a\u51fa\u3057\u3066\u51e6\u7406\u3059\u308b\u300d<\/strong>\u3068\u3044\u3046\u610f\u5473\u304c\u660e\u78ba\u3067\u3001\u30b3\u30fc\u30c9\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">int[] scores = {85, 92, 78, 95, 88};\n\n\/\/ for-each\u6587\uff08\u62e1\u5f35for\u6587\uff09\nfor (int score : scores) {\n    System.out.println(score);\n}\n\/\/ \u8aad\u307f\u65b9: \u300cscores\u306e\u5404\u8981\u7d20\u3092score\u3068\u3057\u3066\u51e6\u7406\u3059\u308b\u300d\n\n\/\/ String\u914d\u5217\u3067\u3082\u540c\u69d8\nString[] names = {\"\u7530\u4e2d\", \"\u9234\u6728\", \"\u5c71\u7530\"};\nfor (String name : names) {\n    System.out.println(name + \"\u3055\u3093\");\n}\n<\/pre><\/div>\n\n\n\n<table>\n<thead><tr><th>\u30eb\u30fc\u30d7\u7a2e\u5225<\/th><th>\u66f8\u304d\u65b9<\/th><th>\u5411\u3044\u3066\u3044\u308b\u5834\u9762<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9for\u6587<\/td><td>for (int i = 0; i < arr.length; i++)<\/td><td>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5fc5\u8981\u30fb\u9006\u9806\u30eb\u30fc\u30d7\u30fb\u4e00\u90e8\u8981\u7d20\u51e6\u7406<\/td><\/tr>\n<tr><td>for-each\u6587<\/td><td>for (\u578b \u5909\u6570 : \u914d\u5217)<\/td><td>\u5168\u8981\u7d20\u3092\u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u3060\u3051\u30fb\u30b3\u30fc\u30c9\u3092\u77ed\u304f\u3057\u305f\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;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">\u9006\u9806\u30eb\u30fc\u30d7\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9for\u6587\u3067<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u914d\u5217\u3092\u9006\u9806\uff08\u672b\u5c3e\u304b\u3089\u5148\u982d\uff09\u306b\u51e6\u7406\u3057\u305f\u3044\u5834\u5408\u306f\u3001for-each\u6587\u3067\u306f\u5b9f\u73fe\u3067\u304d\u307e\u305b\u3093\u3002\u300cfor (int i = scores.length - 1; i >= 0; i--)\u300d\u306e\u3088\u3046\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9for\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p><\/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\">\u30d7\u30ed\u306e\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u3068\u3001for-each\u6587\u304c\u591a\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u7406\u7531\u306f\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7ba1\u7406\u30df\u30b9\uff08ArrayIndexOutOfBoundsException\uff09\u300d\u304c\u8d77\u304d\u306a\u3044\u304b\u3089\u3067\u3059\u3002\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u4e0d\u8981\u306a\u3089\u7a4d\u6975\u7684\u306bfor-each\u3092\u4f7f\u3044\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">MULTIDIMENSIONAL<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u591a\u6b21\u5143\u914d\u5217\uff082\u6b21\u5143\u914d\u5217\uff09<\/span>\n  <span class=\"section-desc\">\u8868\u30fb\u30de\u30c8\u30ea\u30af\u30b9\u30c7\u30fc\u30bf\u306e\u6271\u3044\u65b9<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u3067\u306f<strong>2\u6b21\u5143\u30fb3\u6b21\u5143\u306e\u591a\u6b21\u5143\u914d\u5217<\/strong>\u3092\u6271\u3048\u307e\u3059\u3002\u6700\u3082\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u306f2\u6b21\u5143\u914d\u5217\u3067\u3001\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u58f2\u4e0a\u6708\u6b21\u8868\u3001\u5ea7\u5e2d\u8868\u3001\u30b2\u30fc\u30e0\u306e\u30b0\u30ea\u30c3\u30c9\u306a\u3069\uff09\u3092\u7ba1\u7406\u3059\u308b\u306e\u306b\u4fbf\u5229\u3067\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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>2\u6b21\u5143\u914d\u5217<\/strong>\uff1a\u884c\u3068\u5217\u306e2\u8ef8\u3067\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020\u3002\u300c\u914d\u5217\u306e\u914d\u5217\u300d\u3068\u3082\u8a00\u3048\u308b\u3002matrix[\u884c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9][\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9]\u3068\u3044\u3046\u5f62\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3001Excel\u306e\u8868\u306e\u3088\u3046\u306a\u30c7\u30fc\u30bf\u7ba1\u7406\u306b\u4f7f\u308f\u308c\u308b\u3002<\/p><\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ 2\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\nint[][] matrix = {\n    {1, 2, 3},   \/\/ 0\u884c\u76ee\n    {4, 5, 6},   \/\/ 1\u884c\u76ee\n    {7, 8, 9}    \/\/ 2\u884c\u76ee\n};\n\n\/\/ \u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9: [\u884c][\u5217]\nSystem.out.println(matrix[0][0]);   \/\/ 1\uff080\u884c0\u5217\uff09\nSystem.out.println(matrix[1][1]);   \/\/ 5\uff081\u884c1\u5217\uff09\nSystem.out.println(matrix[2][2]);   \/\/ 9\uff082\u884c2\u5217\uff09\n\n\/\/ \u884c\u6570\u3068\u5217\u6570\nSystem.out.println(matrix.length);       \/\/ 3\uff08\u884c\u6570\uff09\nSystem.out.println(matrix[0].length);    \/\/ 3\uff080\u884c\u76ee\u306e\u5217\u6570\uff09\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-1. 2\u6b21\u5143\u914d\u5217\u306enew\u6f14\u7b97\u5b50\u306b\u3088\u308b\u521d\u671f\u5316<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ new\u30672\u6b21\u5143\u914d\u5217\u3092\u78ba\u4fdd\uff083\u884c4\u5217\uff09\nint[][] salesData = new int[3][4];\n\n\/\/ \u6708\u6b21\u58f2\u4e0a\u30c7\u30fc\u30bf\u306e\u4f8b\uff083\u30f6\u6708 \u00d7 4\u9031\uff09\nsalesData[0][0] = 120;   \/\/ 1\u30f6\u6708\u76ee 1\u9031\u76ee\nsalesData[0][1] = 135;   \/\/ 1\u30f6\u6708\u76ee 2\u9031\u76ee\nsalesData[0][2] = 98;    \/\/ 1\u30f6\u6708\u76ee 3\u9031\u76ee\nsalesData[0][3] = 145;   \/\/ 1\u30f6\u6708\u76ee 4\u9031\u76ee\n\/\/ ...\u4ee5\u4e0b\u7565\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">7-2. 2\u6b21\u5143\u914d\u5217\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406\uff08\u4e8c\u91cdfor\u6587\uff09<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">int[][] matrix = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\n\/\/ \u4e8c\u91cdfor\u6587\u3067\u5168\u8981\u7d20\u3092\u51fa\u529b\nfor (int i = 0; i < matrix.length; i++) {         \/\/ \u884c\u306e\u30eb\u30fc\u30d7\n    for (int j = 0; j < matrix[i].length; j++) {  \/\/ \u5217\u306e\u30eb\u30fc\u30d7\n        System.out.print(matrix[i][j] + \" \");\n    }\n    System.out.println();  \/\/ \u6539\u884c\n}\n\/\/ \u51fa\u529b:\n\/\/ 1 2 3\n\/\/ 4 5 6\n\/\/ 7 8 9\n<\/pre><\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>2\u6b21\u5143\u914d\u5217<\/strong><br><span style=\"font-size:12px;\">int[\u884c][\u5217]<br>\u8868\u5f62\u5f0f\u30c7\u30fc\u30bf<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5916\u5074\u30eb\u30fc\u30d7<\/strong><br><span style=\"font-size:12px;\">i: \u884c\u3092\u8d70\u67fb<br>matrix.length<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5185\u5074\u30eb\u30fc\u30d7<\/strong><br><span style=\"font-size:12px;\">j: \u5217\u3092\u8d70\u67fb<br>matrix[i].length<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u8981\u7d20\u51e6\u7406<\/strong><br><span style=\"font-size:12px;\">matrix[i][j]<br>\u500b\u5225\u5024\u306b\u30a2\u30af\u30bb\u30b9<\/span><\/div>\n<\/div>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:20px;\">&#9888;&#65039;<\/span><strong style=\"color:#dc2626;font-size:16px;\">\u30b8\u30e3\u30b0\u914d\u5217\uff08\u4e0d\u898f\u52472\u6b21\u5143\u914d\u5217\uff09<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">Java\u306e2\u6b21\u5143\u914d\u5217\u306f\u5404\u884c\u306e\u5217\u6570\u304c\u7570\u306a\u308b\u300c\u30b8\u30e3\u30b0\u914d\u5217\uff08jagged array\uff09\u300d\u304c\u4f5c\u308c\u307e\u3059\u3002matrix[0]\u3068matrix[1]\u306e\u5217\u6570\u304c\u9055\u3046\u5834\u5408\u3067\u3082\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u51e6\u7406\u304c\u8907\u96d1\u306b\u306a\u308b\u305f\u3081\u3001\u901a\u5e38\u306f\u5168\u884c\u306e\u5217\u6570\u3092\u63c3\u3048\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p><\/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\">2\u6b21\u5143\u914d\u5217\u306f\u6700\u521d\u306f\u96e3\u3057\u304f\u898b\u3048\u307e\u3059\u304c\u3001\u300cExcel\u306e\u8868\u3068\u540c\u3058\u300d\u3068\u601d\u3048\u3070\u30b7\u30f3\u30d7\u30eb\u3067\u3059\u3002\u884c\u756a\u53f7\u3068\u5217\u756a\u53f7\u3067\u5404\u30bb\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u2014\u2014\u3053\u308c\u3060\u3051\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">SORTING<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u914d\u5217\u306e\u30bd\u30fc\u30c8\uff08Arrays.sort\uff09<\/span>\n  <span class=\"section-desc\">1\u884c\u3067\u4e26\u3073\u66ff\u3048\u3092\u5b9f\u73fe\u3059\u308b\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306b\u306f\u914d\u5217\u3092\u30bd\u30fc\u30c8\uff08\u4e26\u3073\u66ff\u3048\uff09\u3059\u308b\u305f\u3081\u306e<strong>Arrays.sort()<\/strong>\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u81ea\u5206\u3067\u30bd\u30fc\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>Arrays.sort()<\/strong>\uff1ajava.util.Arrays\u30af\u30e9\u30b9\u306b\u542b\u307e\u308c\u308b\u30bd\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9\u3002int\u30fbdouble\u7b49\u306e\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u914d\u5217\u306b\u306f\u9ad8\u901f\u306a\u30c7\u30e5\u30a2\u30eb\u30d4\u30dc\u30c3\u30c8\u30af\u30a4\u30c3\u30af\u30bd\u30fc\u30c8\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u914d\u5217\u306b\u306fTimsort\u3092\u4f7f\u7528\u3059\u308b\u3002\u4f7f\u7528\u524d\u306b\u300cimport java.util.Arrays;\u300d\u304c\u5fc5\u8981\u3002<\/p><\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><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.Arrays;\n\npublic class ArraySortExample {\n    public static void main(String[] args) {\n\n        \/\/ int\u914d\u5217\u306e\u6607\u9806\u30bd\u30fc\u30c8\n        int[] scores = {85, 92, 78, 95, 88};\n        Arrays.sort(scores);\n        System.out.println(Arrays.toString(scores));\n        \/\/ \u51fa\u529b: [78, 85, 88, 92, 95]\n\n        \/\/ String\u914d\u5217\u306e\u30bd\u30fc\u30c8\uff08\u8f9e\u66f8\u9806\uff09\n        String[] names = {\"\u7530\u4e2d\", \"\u9234\u6728\", \"\u5c71\u7530\", \"\u4f50\u85e4\"};\n        Arrays.sort(names);\n        System.out.println(Arrays.toString(names));\n        \/\/ \u8f9e\u66f8\u9806\u3067\u30bd\u30fc\u30c8\u3055\u308c\u308b\n\n        \/\/ \u90e8\u5206\u7684\u306b\u30bd\u30fc\u30c8\uff08\u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u304b\u30893\u307e\u3067\uff09\n        int[] data = {5, 3, 1, 4, 2};\n        Arrays.sort(data, 1, 4);  \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u301c3\u3092\u30bd\u30fc\u30c8\n        System.out.println(Arrays.toString(data));\n        \/\/ \u51fa\u529b: [5, 1, 3, 4, 2]\n\n    }\n}\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">8-1. \u964d\u9806\u30bd\u30fc\u30c8\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Arrays.sort()\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u6607\u9806\u30bd\u30fc\u30c8\u3067\u3059\u3002\u964d\u9806\uff08\u5927\u304d\u3044\u9806\uff09\u306b\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08int[]\uff09\u3067\u306f\u4e00\u624b\u9593\u5fc5\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;\"><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.Arrays;\nimport java.util.Collections;\n\n\/\/ Integer\u914d\u5217\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\uff09\u306a\u3089\u9006\u9806\u306b\u76f4\u63a5\u5bfe\u5fdc\nInteger[] scores = {85, 92, 78, 95, 88};\nArrays.sort(scores, Collections.reverseOrder());\nSystem.out.println(Arrays.toString(scores));\n\/\/ \u51fa\u529b: [95, 92, 88, 85, 78]\n\n\/\/ int[]\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u306e\u5834\u5408\u306f\u624b\u52d5\u3067\u9006\u8ee2\u3055\u305b\u308b\nint[] primitiveScores = {85, 92, 78, 95, 88};\nArrays.sort(primitiveScores);\n\/\/ \u6607\u9806\u30bd\u30fc\u30c8\u5f8c\u306b\u9006\u8ee2\nfor (int i = 0; i < primitiveScores.length \/ 2; i++) {\n    int temp = primitiveScores[i];\n    primitiveScores[i] = primitiveScores[primitiveScores.length - 1 - i];\n    primitiveScores[primitiveScores.length - 1 - i] = temp;\n}\nSystem.out.println(Arrays.toString(primitiveScores));\n\/\/ \u51fa\u529b: [95, 92, 88, 85, 78]\n<\/pre><\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">Arrays.toString()\u306e\u4fbf\u5229\u3055<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u914d\u5217\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3068\u304d\u3001System.out.println(scores)\u3068\u3059\u308b\u3068\u300c[I@1b6d3586\u300d\u306e\u3088\u3046\u306a\u53c2\u7167\u30a2\u30c9\u30ec\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002Arrays.toString(scores)\u3092\u4f7f\u3046\u3068\u300c[85, 92, 78, 95, 88]\u300d\u3068\u4e2d\u8eab\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u30c7\u30d0\u30c3\u30b0\u6642\u306b\u5fc5\u9808\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p><\/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\">\u624b\u30bd\u30fc\u30c8\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\uff08\u30d0\u30d6\u30eb\u30bd\u30fc\u30c8\u3001\u30af\u30a4\u30c3\u30af\u30bd\u30fc\u30c8\u306a\u3069\uff09\u306f\u5b66\u7fd2\u3068\u3057\u3066\u9762\u767d\u3044\u3067\u3059\u304c\u3001\u672c\u756a\u30b3\u30fc\u30c9\u3067\u306f\u5fc5\u305aArrays.sort()\u3092\u4f7f\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u9ad8\u5ea6\u306b\u6700\u9069\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u81ea\u4f5c\u3088\u308a\u5fc5\u305a\u901f\u304f\u5b89\u5168\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-array&#038;blog_slug=cc-java-array\" 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-array&#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;\">ARRAYLIST<\/span>\n  <span class=\"section-title\" style=\"display:block;\">ArrayList\u3068\u306e\u9055\u3044\u30fb\u4f7f\u3044\u5206\u3051<\/span>\n  <span class=\"section-desc\">\u56fa\u5b9a\u9577\u306e\u914d\u5217\u304b\u3001\u53ef\u5909\u9577\u306eArrayList\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u3067\u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u3001\u914d\u5217\u3068\u4e26\u3093\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u304c<strong>ArrayList<\/strong>\u3067\u3059\u30022\u3064\u306e\u6700\u5927\u306e\u9055\u3044\u306f\u300c<strong>\u30b5\u30a4\u30ba\u304c\u56fa\u5b9a\u304b\u5909\u66f4\u53ef\u80fd\u304b<\/strong>\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u6bd4\u8f03\u8ef8<\/th><th>\u914d\u5217\uff08Array\uff09<\/th><th>ArrayList<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u30b5\u30a4\u30ba<\/td><td>\u4f5c\u6210\u6642\u306b\u56fa\u5b9a\u30fb\u5909\u66f4\u4e0d\u53ef<\/td><td>\u5f8c\u304b\u3089\u8ffd\u52a0\u30fb\u524a\u9664\u304c\u53ef\u80fd<\/td><\/tr>\n<tr><td>\u578b\u306e\u5236\u7d04<\/td><td>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578bOK\uff08int, double\u7b49\uff09<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u307f\uff08Integer, Double\u7b49\uff09<\/td><\/tr>\n<tr><td>\u30a2\u30af\u30bb\u30b9\u901f\u5ea6<\/td><td>\u975e\u5e38\u306b\u9ad8\u901f\uff08O(1)\uff09<\/td><td>\u9ad8\u901f\uff08O(1)\uff09\u203b\u307b\u307c\u540c\u7b49<\/td><\/tr>\n<tr><td>\u8ffd\u52a0\u30fb\u524a\u9664<\/td><td>\u76f4\u63a5\u306f\u3067\u304d\u306a\u3044\uff08\u30b3\u30d4\u30fc\u64cd\u4f5c\u304c\u5fc5\u8981\uff09<\/td><td>add()\u30fbremove()\u30e1\u30bd\u30c3\u30c9\u3067\u7c21\u5358<\/td><\/tr>\n<tr><td>\u30e1\u30e2\u30ea\u52b9\u7387<\/td><td>\u56fa\u5b9a\u9577\u3067\u7121\u99c4\u304c\u306a\u3044<\/td><td>\u4f59\u5206\u306a\u9818\u57df\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u5c11\u3057\u591a\u3044<\/td><\/tr>\n<tr><td>null\u683c\u7d0d<\/td><td>\u53ef\u80fd<\/td><td>\u53ef\u80fd<\/td><\/tr>\n<tr><td>\u4e3b\u306a\u7528\u9014<\/td><td>\u56fa\u5b9a\u6570\u306e\u30c7\u30fc\u30bf\uff08\u90317\u65e5\u3001\u670812\u30f6\u6708\u7b49\uff09<\/td><td>\u4ef6\u6570\u304c\u5909\u52d5\u3059\u308b\u30c7\u30fc\u30bf\uff08\u30e6\u30fc\u30b6\u30fc\u30ea\u30b9\u30c8\u7b49\uff09<\/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;\"><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.ArrayList;\n\n\/\/ \u914d\u5217\uff08\u56fa\u5b9a\u9577\uff09\nint[] fixedArray = new int[5];\nfixedArray[0] = 10;\n\/\/ fixedArray[5] = 60;  \/\/ \u30a8\u30e9\u30fc\uff01 \u7bc4\u56f2\u5916\n\n\/\/ ArrayList\uff08\u53ef\u5909\u9577\uff09\nArrayList<Integer> dynamicList = new ArrayList<>();\ndynamicList.add(10);\ndynamicList.add(20);\ndynamicList.add(30);\nSystem.out.println(dynamicList.size());   \/\/ 3\uff08size\u30e1\u30bd\u30c3\u30c9\u3067\u8981\u7d20\u6570\uff09\ndynamicList.remove(1);                    \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b91\u306e\u8981\u7d20\u3092\u524a\u9664\nSystem.out.println(dynamicList);          \/\/ [10, 30]\ndynamicList.add(50);\nSystem.out.println(dynamicList.size());   \/\/ 3\uff08\u307e\u305f3\u306b\u306a\u3063\u305f\uff09\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">9-1. \u914d\u5217\u3068ArrayList\u306e\u5909\u63db<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><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.Arrays;\nimport java.util.ArrayList;\nimport java.util.List;\n\n\/\/ \u914d\u5217 \u2192 ArrayList\nString[] array = {\"A\", \"B\", \"C\"};\nArrayList<String> list = new ArrayList<>(Arrays.asList(array));\nlist.add(\"D\");\nSystem.out.println(list);   \/\/ [A, B, C, D]\n\n\/\/ ArrayList \u2192 \u914d\u5217\nString[] backToArray = list.toArray(new String[0]);\nSystem.out.println(Arrays.toString(backToArray));   \/\/ [A, B, C, D]\n<\/pre><\/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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\uff08\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\uff09<\/strong>\uff1aArrayList&lt;Integer&gt; \u3084 ArrayList&lt;String&gt; \u306e&lt;&gt;\u5185\u306b\u66f8\u304f\u578b\u6307\u5b9a\u306e\u3053\u3068\u3002\u300c\u3053\u306e ArrayList \u306f Integer \u578b\u3060\u3051\u5165\u308c\u308b\u300d\u3068\u660e\u793a\u3059\u308b\u3053\u3068\u3067\u3001\u578b\u306e\u6df7\u5165\u30df\u30b9\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u691c\u51fa\u3067\u304d\u308b\u3002Java 5\u4ee5\u964d\u306e\u6a19\u6e96\u6a5f\u80fd\u3002<\/p><\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u8ff7\u3063\u305f\u3089<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u8ff7\u3063\u305f\u3089<strong>ArrayList<\/strong>\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002\u73fe\u4ee3\u306eJava\u958b\u767a\u3067\u306f\u3001\u4ef6\u6570\u304c\u6700\u521d\u304b\u3089\u56fa\u5b9a\u3068\u78ba\u5b9a\u3057\u3066\u3044\u308b\u5834\u5408\uff08\u6708\u306e\u914d\u5217\uff1d12\u56fa\u5b9a\u3001\u9031\u306e\u914d\u5217\uff1d7\u56fa\u5b9a\u306a\u3069\uff09\u4ee5\u5916\u306f\u3001ArrayList\u306e\u65b9\u304c\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6700\u512a\u5148\u306e\u5834\u5408\u306e\u307f\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u914d\u5217\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p><\/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\">\u5b9f\u52d9\u306eJava\u30b3\u30fc\u30c9\u3092\u898b\u308b\u3068\u3001ArrayList\u3068StreamAPI\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u5727\u5012\u7684\u306b\u591a\u304f\u767b\u5834\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u914d\u5217\u3082\u78ba\u304b\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u300c\u4e21\u65b9\u3092\u77e5\u3063\u3066\u3044\u3066\u4f7f\u3044\u5206\u3051\u3089\u308c\u308b\u300d\u72b6\u614b\u3092\u76ee\u6307\u3057\u3066\u304f\u3060\u3055\u3044\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-array&#038;blog_slug=cc-java-array\" 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-array&#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 USE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u696d\u52d9\u3067\u306e\u914d\u5217\u6d3b\u7528\u4f8b<\/span>\n  <span class=\"section-desc\">\u5b9f\u969b\u306e\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u914d\u5217\u304c\u3069\u3046\u4f7f\u308f\u308c\u308b\u304b<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u914d\u5217\u306f\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u69d8\u3005\u306a\u5834\u9762\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5358\u7d14\u306a\u30c7\u30fc\u30bf\u683c\u7d0d\u3060\u3051\u3067\u306a\u304f\u3001<strong>\u8a08\u7b97\u51e6\u7406\u30fb\u30c7\u30fc\u30bf\u691c\u7d22\u30fb\u96c6\u8a08<\/strong>\u306a\u3069\u591a\u69d8\u306a\u7528\u9014\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u5b9f\u52d9\u306b\u8fd1\u3044\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10-1. \u6708\u6b21\u58f2\u4e0a\u96c6\u8a08<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u6708\u6b21\u58f2\u4e0a\u30c7\u30fc\u30bf\u306e\u96c6\u8a08\nint[] monthlySales = {\n    150000, 180000, 210000, 190000, 220000, 240000,\n    200000, 230000, 260000, 180000, 200000, 350000\n};\n\nint totalSales = 0;\nint maxSales = monthlySales[0];\nint minSales = monthlySales[0];\nint maxMonth = 0;\n\nfor (int i = 0; i < monthlySales.length; i++) {\n    totalSales += monthlySales[i];\n    if (monthlySales[i] > maxSales) {\n        maxSales = monthlySales[i];\n        maxMonth = i + 1;  \/\/ \u6708\uff081\u6708=1\uff09\n    }\n    if (monthlySales[i] < minSales) {\n        minSales = monthlySales[i];\n    }\n}\n\ndouble averageSales = (double) totalSales \/ monthlySales.length;\nSystem.out.println(\"\u5e74\u9593\u58f2\u4e0a\u5408\u8a08: \" + totalSales + \"\u5186\");\nSystem.out.println(\"\u6708\u5e73\u5747\u58f2\u4e0a: \" + (int)averageSales + \"\u5186\");\nSystem.out.println(\"\u6700\u9ad8\u58f2\u4e0a\u6708: \" + maxMonth + \"\u6708\uff08\" + maxSales + \"\u5186\uff09\");\nSystem.out.println(\"\u6700\u4f4e\u58f2\u4e0a\u6708: \" + minSales + \"\u5186\");\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">10-2. \u70b9\u6570\u306e\u30e9\u30f3\u30af\u5224\u5b9a<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u30c6\u30b9\u30c8\u30b9\u30b3\u30a2\u306e\u30e9\u30f3\u30af\u5224\u5b9a\uff08\u914d\u5217\u3067\u95be\u5024\u3092\u7ba1\u7406\uff09\nint[] scores = {85, 52, 93, 67, 78, 41, 99, 74};\nString[] grades = {\"F\", \"D\", \"C\", \"B\", \"A\", \"S\"};\nint[] thresholds = {0, 40, 60, 70, 80, 90};\n\nfor (int score : scores) {\n    String grade = grades[0];\n    for (int i = thresholds.length - 1; i >= 0; i--) {\n        if (score >= thresholds[i]) {\n            grade = grades[i];\n            break;\n        }\n    }\n    System.out.println(\"\u30b9\u30b3\u30a2\" + score + \": \" + grade + \"\u30e9\u30f3\u30af\");\n}\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">10-3. \u5728\u5eab\u7ba1\u7406\u3067\u306e\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\">\/\/ \u5546\u54c1\u5728\u5eab\u30c1\u30a7\u30c3\u30af\nString[] itemNames = {\"\u5546\u54c1A\", \"\u5546\u54c1B\", \"\u5546\u54c1C\", \"\u5546\u54c1D\"};\nint[] stockQuantity = {50, 0, 15, 8};\nint[] reorderLevel  = {20, 10, 10, 5};  \/\/ \u767a\u6ce8\u70b9\n\nSystem.out.println(\"=== \u5728\u5eab\u30a2\u30e9\u30fc\u30c8 ===\");\nfor (int i = 0; i < itemNames.length; i++) {\n    if (stockQuantity[i] == 0) {\n        System.out.println(\"[\u6b20\u54c1] \" + itemNames[i]);\n    } else if (stockQuantity[i] <= reorderLevel[i]) {\n        System.out.println(\"[\u8981\u767a\u6ce8] \" + itemNames[i]\n            + \"\uff08\u6b8b\u308a\" + stockQuantity[i] + \"\u500b\uff09\");\n    }\n}\n<\/pre><\/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\">\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u8907\u6570\u306e\u914d\u5217\u3092\u300c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u63c3\u3048\u308b\u300d\u8a2d\u8a08\u304c\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002itemNames[i]\u3068stockQuantity[i]\u304c\u540c\u3058\u5546\u54c1\u3092\u6307\u3059\u3088\u3046\u306b\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u63c3\u3048\u308b\u3053\u3068\u3067\u95a2\u9023\u30c7\u30fc\u30bf\u3092\u30b0\u30eb\u30fc\u30d7\u3068\u3057\u3066\u6271\u3048\u307e\u3059\u3002\u305f\u3060\u3057\u898f\u6a21\u304c\u5927\u304d\u304f\u306a\u308b\u3068\u7ba1\u7406\u304c\u96e3\u3057\u304f\u306a\u308b\u305f\u3081\u3001\u305d\u306e\u5834\u5408\u306f\u30af\u30e9\u30b9\u3084Map\u3092\u4f7f\u3046\u8a2d\u8a08\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\"><div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\"><span style=\"font-size:18px;\">&#128161;<\/span><strong style=\"color:#16a34a;font-size:15px;\">\u914d\u5217\u3092\u30af\u30e9\u30b9\u3067\u5305\u3080\u8a2d\u8a08\u3078<\/strong><\/div><p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u5b9f\u969b\u306e\u696d\u52d9\u958b\u767a\u3067\u306f\u3001\u5546\u54c1\u540d\u3068\u5728\u5eab\u6570\u3092\u5225\u3005\u306e\u914d\u5217\u3067\u7ba1\u7406\u3059\u308b\u3088\u308a\u3001\u300cProduct\u30af\u30e9\u30b9\uff08name, stock, reorderLevel\uff09\u300d\u306e\u3088\u3046\u306b\u30af\u30e9\u30b9\u306b\u5305\u3093\u3067ArrayList\u3067\u7ba1\u7406\u3059\u308b\u8a2d\u8a08\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u914d\u5217\u306e\u57fa\u790e\u3092\u5b66\u3093\u3060\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u3057\u3066\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08\u3092\u5b66\u3076\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p><\/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-array&#038;blog_slug=cc-java-array\" 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-array&#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<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067\u914d\u5217\u51e6\u7406\u3092\u81ea\u52d5\u5316<\/span>\n  <span class=\"section-desc\">AI\u304c\u914d\u5217\u30b3\u30fc\u30c9\u306e\u751f\u6210\u30fb\u30c7\u30d0\u30c3\u30b0\u30fb\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u62c5\u3046<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u914d\u5217\u306e\u57fa\u790e\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u6b21\u306f<strong>Claude Code<\/strong>\u3092\u6d3b\u7528\u3057\u3066\u914d\u5217\u51e6\u7406\u306e\u81ea\u52d5\u5316\u30fb\u52b9\u7387\u5316\u3092\u5b9f\u73fe\u3057\u307e\u3057\u3087\u3046\u3002Claude Code\u306f\u3001\u30b3\u30fc\u30c9\u306e\u751f\u6210\u30fb\u30c7\u30d0\u30c3\u30b0\u30fb\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u5bfe\u8a71\u7684\u306b\u884c\u3048\u308bAI\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a2\u30b7\u30b9\u30bf\u30f3\u30c8\u3067\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;\"><p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p><p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>Claude Code<\/strong>\uff1aAnthropic\u793e\u304c\u63d0\u4f9b\u3059\u308b\u30bf\u30fc\u30df\u30ca\u30eb\u30d9\u30fc\u30b9\u306eAI\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30a2\u30b7\u30b9\u30bf\u30f3\u30c8\u3002\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u30fb\u30b3\u30de\u30f3\u30c9\u5b9f\u884c\u30fb\u30b3\u30fc\u30c9\u751f\u6210\u3092\u81ea\u5f8b\u7684\u306b\u884c\u3046\u3002Java\u306e\u30b3\u30fc\u30c9\u3092IDE\u306a\u3057\u3067\u3082\u751f\u6210\u30fb\u5b9f\u884c\u30fb\u4fee\u6b63\u3067\u304d\u308b\u305f\u3081\u3001\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u3082\u5b9f\u52d9\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308b\u3002<\/p><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-1. Claude Code\u3078\u306e\u5177\u4f53\u7684\u306a\u4f9d\u983c\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Code\u306b\u914d\u5217\u51e6\u7406\u3092\u4f9d\u983c\u3059\u308b\u969b\u306f\u3001<strong>\u5177\u4f53\u7684\u306a\u30c7\u30fc\u30bf\u5f62\u5f0f\u30fb\u51e6\u7406\u5185\u5bb9\u30fb\u51fa\u529b\u5f62\u5f0f<\/strong>\u3092\u660e\u793a\u3059\u308b\u3053\u3068\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4f9d\u983c\u304c\u52b9\u679c\u7684\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>\u300cint\u914d\u5217\u3067\u6708\u6b21\u58f2\u4e0a\u30c7\u30fc\u30bf\u3092\u6301\u3061\u3001\u5408\u8a08\u30fb\u5e73\u5747\u30fb\u6700\u5927\u5024\u30fb\u6700\u5c0f\u5024\u3092\u8a08\u7b97\u3059\u308bJava\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d<\/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>\u300cString\u914d\u5217\u306e\u5546\u54c1\u540d\u3068int\u914d\u5217\u306e\u5728\u5eab\u6570\u3092\u4f7f\u3063\u3066\u3001\u5728\u5eab\u5207\u308c\u5546\u54c1\u4e00\u89a7\u3092\u51fa\u529b\u3059\u308b\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d<\/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>\u300c\u3053\u306e2\u6b21\u5143\u914d\u5217\u306e\u30c7\u30fc\u30bf\u3092CSV\u5f62\u5f0f\u3067\u51fa\u529b\u3059\u308b\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d<\/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>\u300cArrayIndexOutOfBoundsException\u304c\u51fa\u3066\u3044\u308b\u3053\u306e\u30b3\u30fc\u30c9\u306e\u30d0\u30b0\u3092\u898b\u3064\u3051\u3066\u4fee\u6b63\u3057\u3066\u300d<\/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>\u300c\u3053\u306e\u914d\u5217\u51e6\u7406\u30b3\u30fc\u30c9\u3092ArrayList\u3068StreamAPI\u3092\u4f7f\u3063\u3066\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u300d<\/span><\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">11-2. Claude Code\u304c\u5f97\u610f\u306a\u914d\u5217\u4f5c\u696d<\/h3>\n\n\n\n<table>\n<thead><tr><th>\u4f5c\u696d\u5185\u5bb9<\/th><th>Claude Code\u306b\u983c\u3080\u52b9\u679c<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u914d\u5217\u306e\u521d\u671f\u5316\u30fb\u5ba3\u8a00\u30b3\u30fc\u30c9\u751f\u6210<\/td><td>\u30c7\u30fc\u30bf\u4ed5\u69d8\u3092\u4f1d\u3048\u308b\u3060\u3051\u3067\u5b8c\u5168\u306a\u30b3\u30fc\u30c9\u3092\u751f\u6210<\/td><\/tr>\n<tr><td>\u30bd\u30fc\u30c8\u30fb\u96c6\u8a08\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5<\/td><td>\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u65e5\u672c\u8a9e\u3067\u8aac\u660e\u3059\u308b\u3068\u5b9f\u88c5\u3057\u3066\u304f\u308c\u308b<\/td><\/tr>\n<tr><td>ArrayIndexOutOfBoundsException\u5bfe\u5fdc<\/td><td>\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u8cbc\u308b\u3068\u539f\u56e0\u7279\u5b9a\u3068\u4fee\u6b63\u30b3\u30fc\u30c9\u3092\u63d0\u793a<\/td><\/tr>\n<tr><td>\u914d\u5217\u2192ArrayList\u3078\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/td><td>\u65e2\u5b58\u30b3\u30fc\u30c9\u3092\u6e21\u3059\u3060\u3051\u3067\u5909\u63db\u6848\u3092\u63d0\u793a<\/td><\/tr>\n<tr><td>2\u6b21\u5143\u914d\u5217\u306e\u8868\u5f62\u5f0f\u51fa\u529b<\/td><td>\u51fa\u529b\u5f62\u5f0f\uff08\u8868\u3001CSV\u7b49\uff09\u3092\u6307\u5b9a\u3059\u308b\u3068\u5b9f\u88c5<\/td><\/tr>\n<tr><td>\u5358\u4f53\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u751f\u6210<\/td><td>\u30e1\u30bd\u30c3\u30c9\u3092\u6e21\u3059\u3068JUnit\u306e\u30c6\u30b9\u30c8\u30b1\u30fc\u30b9\u3092\u81ea\u52d5\u751f\u6210<\/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;\"><pre style=\"margin:0;color:#d4d4d4;font-family:'Courier New',Courier,monospace;font-size:14px;line-height:1.7;white-space:pre;\"># Claude Code\u3078\u306e\u4f9d\u983c\u4f8b\uff08\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u306e\u5165\u529b\uff09\n$ claude\n\n> \u4ee5\u4e0b\u306e\u4ed5\u69d8\u306eJava\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u304f\u3060\u3055\u3044\uff1a\n> - String\u914d\u5217\u3067\u5546\u54c1\u540d\uff085\u4ef6\uff09\u3092\u7ba1\u7406\n> - int\u914d\u5217\u3067\u5bfe\u5fdc\u3059\u308b\u58f2\u4fa1\u3092\u7ba1\u7406\n> - \u58f2\u4fa1\u306e\u964d\u9806\u3067\u5546\u54c1\u540d\u3068\u58f2\u4fa1\u3092\u51fa\u529b\u3059\u308b\n> - \u30e1\u30a4\u30f3\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3080\u5b8c\u5168\u306a\u30af\u30e9\u30b9\u3068\u3057\u3066\n\n# Claude Code\u304c\u30b3\u30fc\u30c9\u3092\u751f\u6210\u30fb\u78ba\u8a8d\u30fb\u5b9f\u884c\u307e\u3067\u884c\u3046\n<\/pre><\/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\">Claude Code\u3092\u4f7f\u3046\u3068\u3001Java\u306e\u6587\u6cd5\u3092\u7d30\u304b\u304f\u899a\u3048\u3066\u3044\u306a\u304f\u3066\u3082\u300c\u3084\u308a\u305f\u3044\u3053\u3068\u300d\u3092\u65e5\u672c\u8a9e\u3067\u4f1d\u3048\u308c\u3070\u52d5\u304f\u30b3\u30fc\u30c9\u304c\u5f97\u3089\u308c\u307e\u3059\u3002\u914d\u5217\u51e6\u7406\u3067\u8a70\u307e\u3063\u305f\u3068\u304d\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u305d\u306e\u307e\u307e\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u539f\u56e0\u3068\u4fee\u6b63\u6cd5\u3092\u6559\u3048\u3066\u304f\u308c\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u306e\u30b3\u30fc\u30c1\u3068\u3057\u3066\u6700\u5f37\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>\u8981\u4ef6\u6574\u7406<\/strong><br><span style=\"font-size:12px;\">\u3069\u3093\u306a\u30c7\u30fc\u30bf\u3092<br>\u3069\u3046\u51e6\u7406\u3057\u305f\u3044\u304b<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>Claude Code\u306b\u4f9d\u983c<\/strong><br><span style=\"font-size:12px;\">\u65e5\u672c\u8a9e\u3067\u4ed5\u69d8\u3092<br>\u8aac\u660e\u3059\u308b<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u30b3\u30fc\u30c9\u751f\u6210<\/strong><br><span style=\"font-size:12px;\">\u5b8c\u5168\u306aJava\u30b3\u30fc\u30c9\u3092<br>\u81ea\u52d5\u751f\u6210<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5b9f\u884c\u30fb\u78ba\u8a8d<\/strong><br><span style=\"font-size:12px;\">\u30a8\u30e9\u30fc\u6642\u306f<br>\u81ea\u52d5\u4fee\u6b63<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u696d\u52d9\u306b\u7d44\u307f\u8fbc\u307f<\/strong><br><span style=\"font-size:12px;\">\u672c\u756a\u30b7\u30b9\u30c6\u30e0\u3078<br>\u7d71\u5408<\/span><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">AI\u9b3c\u7ba1\u7406\u3067\u306f\u3001Claude Code\u3092\u6d3b\u7528\u3057\u3066\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306e\u914d\u5217\u51e6\u7406\u30fb\u30c7\u30fc\u30bf\u96c6\u8a08\u30fb\u81ea\u52d5\u30ec\u30dd\u30fc\u30c8\u751f\u6210\u3092\u5b9f\u8df5\u3057\u3066\u3044\u307e\u3059\u3002\u300cJava\u306f\u66f8\u3051\u306a\u3044\u3051\u3069\u30c7\u30fc\u30bf\u51e6\u7406\u3092\u81ea\u52d5\u5316\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u65b9\u5411\u3051\u306b\u3001Claude Code\u3092\u4f7f\u3063\u305f\u696d\u52d9\u81ea\u52d5\u5316\u306e\u5c0e\u5165\u652f\u63f4\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\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\u306f\u300cJava\u304c\u3067\u304d\u308b\u4eba\u304c\u3055\u3089\u306b\u901f\u304f\u306a\u308b\u30c4\u30fc\u30eb\u300d\u3060\u3051\u3067\u306a\u304f\u3001\u300cJava\u3092\u77e5\u3089\u306a\u3044\u4eba\u3067\u3082\u696d\u52d9\u30b3\u30fc\u30c9\u3092\u4f5c\u308c\u308b\u30c4\u30fc\u30eb\u300d\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u51e6\u7406\u306e\u81ea\u52d5\u5316\u3092\u6a5f\u306b\u3001\u305c\u3072Claude Code\u306e\u6d3b\u7528\u3092\u691c\u8a0e\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\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-array&#038;blog_slug=cc-java-array\" 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-array&#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-12\"><\/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;\">12<\/span>\n  <span class=\"section-label\" style=\"display:block;\">SUMMARY<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u307e\u3068\u3081\uff1aJava\u914d\u5217\u306e\u57fa\u790e\u304b\u3089\u696d\u52d9\u6d3b\u7528\u307e\u3067<\/span>\n  <span class=\"section-desc\">\u62bc\u3055\u3048\u3066\u304a\u304f\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u3092\u6700\u7d42\u6574\u7406<\/span>\n<\/h2>\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>\u914d\u5217<\/strong>\u306f\u56fa\u5b9a\u9577\u30fb\u540c\u4e00\u578b\u306e\u30c7\u30fc\u30bf\u3092\u756a\u53f7\u4ed8\u304d\u3067\u7ba1\u7406\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020<\/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>\u5ba3\u8a00<\/strong>\u306f\u300c\u578b[] \u5909\u6570\u540d\u300d\u3001<strong>\u521d\u671f\u5316<\/strong>\u306fnew\u6f14\u7b97\u5b50\u307e\u305f\u306f\u30ea\u30c6\u30e9\u30eb{}\u306e2\u30d1\u30bf\u30fc\u30f3<\/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>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306f0\u59cb\u307e\u308a<\/strong>\u2014\u2014\u6700\u5f8c\u306e\u8981\u7d20\u306f length-1<\/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>length<\/strong>\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u8981\u7d20\u6570\u3092\u53d6\u5f97\uff08\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u306a\u3044\u306e\u3067\u62ec\u5f27\u306a\u3057\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>for\u6587<\/strong>\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001<strong>for-each\u6587<\/strong>\u306f\u5168\u8981\u7d20\u3092\u9806\u756a\u306b\u51e6\u7406\u3059\u308b\u5834\u5408<\/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>2\u6b21\u5143\u914d\u5217<\/strong>\u306f[\u884c][\u5217]\u3067\u30a2\u30af\u30bb\u30b9\u3001\u4e8c\u91cdfor\u6587\u3067\u5168\u8981\u7d20\u3092\u51e6\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>Arrays.sort()<\/strong>\u30671\u884c\u3067\u30bd\u30fc\u30c8\uff08import java.util.Arrays \u304c\u5fc5\u8981\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>\u53ef\u5909\u9577\u30c7\u30fc\u30bf\u306b\u306fArrayList<\/strong>\u3001\u56fa\u5b9a\u9577\u30c7\u30fc\u30bf\u306b\u306f\u914d\u5217\u304c\u9069\u3057\u3066\u3044\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>Claude Code<\/strong>\u3067\u914d\u5217\u30b3\u30fc\u30c9\u306e\u751f\u6210\u30fb\u30c7\u30d0\u30c3\u30b0\u30fb\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u81ea\u52d5\u5316\u3067\u304d\u308b<\/span><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u306e\u914d\u5217\u306f\u57fa\u790e\u4e2d\u306e\u57fa\u790e\u3067\u3059\u304c\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u3067\u306f\u7e70\u308a\u8fd4\u3057\u767b\u5834\u3059\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u57fa\u672c\u3092\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u305f\u4e0a\u3067\u3001ArrayList\u3084StreamAPI\u3078\u3068\u5fdc\u7528\u306e\u5e45\u3092\u5e83\u3052\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Java\u914d\u5217\u306e\u696d\u52d9\u6d3b\u7528\u3001Claude Code\u3068\u4e00\u7dd2\u306b\u59cb\u3081\u307e\u305b\u3093\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u300cJava\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u305f\u3044\u300d\u300c\u696d\u52d9\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3092\u81ea\u52d5\u5316\u3057\u305f\u3044\u300d\u3068\u3044\u3046\u65b9\u5411\u3051\u306b\u3001AI\u9b3c\u7ba1\u7406\u3067\u306fClaude Code\u3092\u4f7f\u3063\u305f\u696d\u52d9\u81ea\u52d5\u5316\u306e\u5c0e\u5165\u652f\u63f4\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u914d\u5217\u51e6\u7406\u304b\u3089\u59cb\u307e\u308b\u30c7\u30fc\u30bf\u81ea\u52d5\u5316\u306e\u7b2c\u4e00\u6b69\u3092\u3001\u4e00\u7dd2\u306b\u8e0f\u307f\u51fa\u3057\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\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u7d4c\u9a13\u304c\u306a\u304f\u3066\u3082\u5927\u4e08\u592b\u3067\u3059\u3002Claude Code\u3068\u4e00\u7dd2\u306b\u696d\u52d9\u306e\u81ea\u52d5\u5316\u3092\u9032\u3081\u308b\u30b5\u30dd\u30fc\u30c8\u3092\u3057\u307e\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u76f8\u8ac7\u3067\u3001\u3069\u306e\u696d\u52d9\u3092\u81ea\u52d5\u5316\u3067\u304d\u308b\u304b\u4e00\u7dd2\u306b\u8003\u3048\u307e\u3057\u3087\u3046\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-array&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\u914d\u5217\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u5ba3\u8a00\u306f\u300c\u3053\u306e\u5909\u6570\u306f\u914d\u5217\u3092\u683c\u7d0d\u3059\u308b\u5909\u6570\u3067\u3059\u300d\u3068\u3044\u3046\u578b\u3068\u5909\u6570\u540d\u306e\u5b9a\u7fa9\uff08\u4f8b: int[] scores;\uff09\u3002\u521d\u671f\u5316\u306f\u30e1\u30e2\u30ea\u9818\u57df\u3092\u78ba\u4fdd\u3057\u3066\u5b9f\u969b\u306b\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\uff08\u4f8b: scores = new int[5];\uff09\u3002\u5ba3\u8a00\u3060\u3051\u3057\u305f\u72b6\u614b\u3067\u306f\u914d\u5217\u306f\u4f7f\u3048\u305a\u3001\u521d\u671f\u5316\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306e\u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u304b\u3089\u59cb\u307e\u308b\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u300c\u5148\u982d\u8981\u7d20\u304b\u3089\u306e\u8ddd\u96e2\uff08\u30aa\u30d5\u30bb\u30c3\u30c8\uff09\u300d\u3068\u8003\u3048\u308b\u3068\u81ea\u7136\u3067\u3059\u3002\u5148\u982d\u8981\u7d20\u81ea\u4f53\u306f\u30aa\u30d5\u30bb\u30c3\u30c8\u304c0\u306a\u306e\u3067[0]\u3002\u3053\u306e\u8a2d\u8a08\u306fC\u8a00\u8a9e\u306e\u4f1d\u7d71\u3092\u5f15\u304d\u7d99\u3044\u3060\u3082\u306e\u3067\u3001\u30e1\u30e2\u30ea\u8a08\u7b97\u306e\u52b9\u7387\u304c\u826f\u3044\u8a2d\u8a08\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. ArrayIndexOutOfBoundsException\u3092\u9632\u3050\u65b9\u6cd5\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30eb\u30fc\u30d7\u6761\u4ef6\u3092\u300ci < array.length\u300d\u306b\u3059\u308b\uff08i <= array.length \u306f\u5883\u754c\u5916\uff09\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u8ca0\u306e\u6570\u304c\u6765\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3001for-each\u6587\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u3046\u3053\u3068\u3067\u9632\u3052\u307e\u3059\u3002\u307e\u305f\u3001array.length\u3067\u4e8b\u524d\u306b\u8981\u7d20\u6570\u3092\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u914d\u5217\u306e\u30b5\u30a4\u30ba\u3092\u5f8c\u304b\u3089\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Java\u306e\u914d\u5217\u306f\u4e00\u5ea6\u4f5c\u6210\u3059\u308b\u3068\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3067\u304d\u307e\u305b\u3093\u3002\u30b5\u30a4\u30ba\u3092\u5909\u3048\u305f\u3044\u5834\u5408\u306f\u3001\u65b0\u3057\u3044\u30b5\u30a4\u30ba\u306e\u914d\u5217\u3092\u4f5c\u3063\u3066\u30b3\u30d4\u30fc\u3059\u308b\u304b\u3001\u6700\u521d\u304b\u3089ArrayList\u3092\u4f7f\u3046\u306e\u304c\u9069\u5207\u3067\u3059\u3002Arrays.copyOf()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u914d\u5217\u306e\u30b3\u30d4\u30fc\u3068\u30ea\u30b5\u30a4\u30ba\u304c1\u884c\u3067\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. \u914d\u5217\u3068ArrayList\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u8981\u7d20\u6570\u304c\u6700\u521d\u304b\u3089\u56fa\u5b9a\u306a\u3089\u914d\u5217\u3001\u5f8c\u304b\u3089\u5897\u6e1b\u3059\u308b\u306a\u3089 ArrayList \u304c\u9069\u5207\u3067\u3059\u3002\u8ff7\u3063\u305f\u3089 ArrayList \u3092\u9078\u3093\u3067\u304a\u304f\u3068\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6700\u512a\u5148\u306e\u5834\u5408\u306e\u307f\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u914d\u5217\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. 2\u6b21\u5143\u914d\u5217\u30681\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u5206\u3051\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. 1\u6b21\u5143\u914d\u5217\u306f\u300c\u3072\u3068\u3064\u306e\u5217\u306e\u30c7\u30fc\u30bf\uff08\u30b9\u30b3\u30a2\u4e00\u89a7\u30fb\u540d\u524d\u30ea\u30b9\u30c8\u7b49\uff09\u300d\u30012\u6b21\u5143\u914d\u5217\u306f\u300c\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u6708\u00d7\u9031\u306e\u58f2\u4e0a\u3001\u884c\u00d7\u5217\u306e\u30de\u30c8\u30ea\u30af\u30b9\uff09\u300d\u306b\u4f7f\u3044\u307e\u3059\u3002\u8868\u5f62\u5f0f\u3067\u306a\u3044\u30c7\u30fc\u30bf\u3092\u7121\u7406\u306b2\u6b21\u5143\u306b\u3059\u308b\u3068\u30b3\u30fc\u30c9\u304c\u8907\u96d1\u306b\u306a\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u5f62\u306b\u5408\u308f\u305b\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Claude Code\u3067\u914d\u5217\u51e6\u7406\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3082\u3089\u3046\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. \u30bf\u30fc\u30df\u30ca\u30eb\u3067claude\u3068\u5165\u529b\u3057\u3066Claude Code\u3092\u8d77\u52d5\u3057\u3001\u300cint\u914d\u5217\u3067\u25cb\u25cb\u3092\u7ba1\u7406\u3057\u3001\u25cb\u25cb\u3092\u8a08\u7b97\u3059\u308bJava\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d\u306e\u3088\u3046\u306b\u5177\u4f53\u7684\u306b\u4f9d\u983c\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u5834\u5408\u306f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u305d\u306e\u307e\u307e\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u539f\u56e0\u3068\u4fee\u6b63\u6cd5\u3092\u6559\u3048\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\u914d\u5217\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u5ba3\u8a00\u306f\u300c\u3053\u306e\u5909\u6570\u306f\u914d\u5217\u3092\u683c\u7d0d\u3059\u308b\u5909\u6570\u3067\u3059\u300d\u3068\u3044\u3046\u578b\u3068\u5909\u6570\u540d\u306e\u5b9a\u7fa9\uff08\u4f8b: int[] scores;\uff09\u3002\u521d\u671f\u5316\u306f\u30e1\u30e2\u30ea\u9818\u57df\u3092\u78ba\u4fdd\u3057\u3066\u5b9f\u969b\u306b\u4f7f\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3053\u3068\uff08\u4f8b: scores = new int[5];\uff09\u3002\u5ba3\u8a00\u3060\u3051\u3057\u305f\u72b6\u614b\u3067\u306f\u914d\u5217\u306f\u4f7f\u3048\u305a\u3001\u521d\u671f\u5316\u304c\u5fc5\u8981\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306e\u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u304b\u3089\u59cb\u307e\u308b\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u300c\u5148\u982d\u8981\u7d20\u304b\u3089\u306e\u8ddd\u96e2\uff08\u30aa\u30d5\u30bb\u30c3\u30c8\uff09\u300d\u3068\u8003\u3048\u308b\u3068\u81ea\u7136\u3067\u3059\u3002\u5148\u982d\u8981\u7d20\u81ea\u4f53\u306f\u30aa\u30d5\u30bb\u30c3\u30c8\u304c0\u306a\u306e\u3067[0]\u3002\u3053\u306e\u8a2d\u8a08\u306fC\u8a00\u8a9e\u306e\u4f1d\u7d71\u3092\u5f15\u304d\u7d99\u3044\u3060\u3082\u306e\u3067\u3001\u30e1\u30e2\u30ea\u8a08\u7b97\u306e\u52b9\u7387\u304c\u826f\u3044\u8a2d\u8a08\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"ArrayIndexOutOfBoundsException\u3092\u9632\u3050\u65b9\u6cd5\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u30eb\u30fc\u30d7\u6761\u4ef6\u3092\u300ci < array.length\u300d\u306b\u3059\u308b\uff08i <= array.length \u306f\u5883\u754c\u5916\uff09\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u8ca0\u306e\u6570\u304c\u6765\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3001for-each\u6587\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u3046\u3053\u3068\u3067\u9632\u3052\u307e\u3059\u3002\u307e\u305f\u3001array.length\u3067\u4e8b\u524d\u306b\u8981\u7d20\u6570\u3092\u78ba\u8a8d\u3059\u308b\u7fd2\u6163\u3082\u91cd\u8981\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u914d\u5217\u306e\u30b5\u30a4\u30ba\u3092\u5f8c\u304b\u3089\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Java\u306e\u914d\u5217\u306f\u4e00\u5ea6\u4f5c\u6210\u3059\u308b\u3068\u30b5\u30a4\u30ba\u3092\u5909\u66f4\u3067\u304d\u307e\u305b\u3093\u3002\u30b5\u30a4\u30ba\u3092\u5909\u3048\u305f\u3044\u5834\u5408\u306f\u3001\u65b0\u3057\u3044\u30b5\u30a4\u30ba\u306e\u914d\u5217\u3092\u4f5c\u3063\u3066\u30b3\u30d4\u30fc\u3059\u308b\u304b\u3001\u6700\u521d\u304b\u3089ArrayList\u3092\u4f7f\u3046\u306e\u304c\u9069\u5207\u3067\u3059\u3002Arrays.copyOf()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u914d\u5217\u306e\u30b3\u30d4\u30fc\u3068\u30ea\u30b5\u30a4\u30ba\u304c1\u884c\u3067\u66f8\u3051\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"\u914d\u5217\u3068ArrayList\u306f\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u8981\u7d20\u6570\u304c\u6700\u521d\u304b\u3089\u56fa\u5b9a\u306a\u3089\u914d\u5217\u3001\u5f8c\u304b\u3089\u5897\u6e1b\u3059\u308b\u306a\u3089 ArrayList \u304c\u9069\u5207\u3067\u3059\u3002\u8ff7\u3063\u305f\u3089 ArrayList \u3092\u9078\u3093\u3067\u304a\u304f\u3068\u4fdd\u5b88\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u6700\u512a\u5148\u306e\u5834\u5408\u306e\u307f\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u914d\u5217\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"2\u6b21\u5143\u914d\u5217\u30681\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u5206\u3051\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"1\u6b21\u5143\u914d\u5217\u306f\u300c\u3072\u3068\u3064\u306e\u5217\u306e\u30c7\u30fc\u30bf\uff08\u30b9\u30b3\u30a2\u4e00\u89a7\u30fb\u540d\u524d\u30ea\u30b9\u30c8\u7b49\uff09\u300d\u30012\u6b21\u5143\u914d\u5217\u306f\u300c\u8868\u5f62\u5f0f\u306e\u30c7\u30fc\u30bf\uff08\u6708\u00d7\u9031\u306e\u58f2\u4e0a\u3001\u884c\u00d7\u5217\u306e\u30de\u30c8\u30ea\u30af\u30b9\uff09\u300d\u306b\u4f7f\u3044\u307e\u3059\u3002\u8868\u5f62\u5f0f\u3067\u306a\u3044\u30c7\u30fc\u30bf\u3092\u7121\u7406\u306b2\u6b21\u5143\u306b\u3059\u308b\u3068\u30b3\u30fc\u30c9\u304c\u8907\u96d1\u306b\u306a\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u306e\u5f62\u306b\u5408\u308f\u305b\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Claude Code\u3067\u914d\u5217\u51e6\u7406\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3082\u3089\u3046\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"\u30bf\u30fc\u30df\u30ca\u30eb\u3067claude\u3068\u5165\u529b\u3057\u3066Claude Code\u3092\u8d77\u52d5\u3057\u3001\u300cint\u914d\u5217\u3067\u25cb\u25cb\u3092\u7ba1\u7406\u3057\u3001\u25cb\u25cb\u3092\u8a08\u7b97\u3059\u308bJava\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u300d\u306e\u3088\u3046\u306b\u5177\u4f53\u7684\u306b\u4f9d\u983c\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u5834\u5408\u306f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u305d\u306e\u307e\u307e\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u539f\u56e0\u3068\u4fee\u6b63\u6cd5\u3092\u6559\u3048\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 01\u914d\u5217\u3068\u306f\u4f55\u304b\uff08\u30ea\u30b9\u30c8\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u9055\u3044\uff09 02\u914d\u5217\u306e\u5ba3\u8a00\u65b9\u6cd5\uff08\u578b[] \u5909\u6570\u540d\uff09 03\u914d\u5217\u306e\u521d\u671f\u5316\uff08new\u3068\u30ea\u30c6\u30e9\u30eb\u521d\u671f\u5316\uff09 04\u8981\u7d20\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 05\u914d\u5217\u306e\u8981\u7d20\u6570\uff08length\uff09 0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18326,"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\u914d\u5217\u3092\u5b8c\u5168\u89e3\u8aac\u3002\u5ba3\u8a00\u30fb\u521d\u671f\u5316\u30fb\u8981\u7d20\u6570\u53d6\u5f97\u30fb\u8981\u7d20\u8ffd\u52a0\u30fb\u591a\u6b21\u5143\u914d\u5217\u30fbArrayList\u3068\u306e\u6bd4\u8f03\u30fb\u696d\u52d9\u3067\u306e\u6d3b\u7528\u30fbClaude Code\u81ea\u52d5\u5316\u307e\u3067\u975e\u30a8\u30f3\u30b8\u30cb\u30a2\u5411\u3051\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002","rank_math_focus_keyword":"Java \u914d\u5217","rank_math_title":"","pending_rewrite_html":"","pending_rewrite_id":"","pending_rewrite_kw":"","pending_rewrite_at":"","pending_rewrite_source":"","pending_rewrite_brief":"","pending_rewrite_evidence":"","approved_rewrite_html":"","approved_rewrite_id":"","approved_rewrite_kw":"","approved_rewrite_at":"","approved_rewrite_by":"","approved_rewrite_brief":"","approved_rewrite_evidence":"","rewrite_tracker_baseline":"","rewrite_tracker_7day":"","rewrite_tracker_14day":"","rewrite_tracker_30day":"","rewrite_tracker_notified":""},"categories":[3],"tags":[],"class_list":["post-18327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai-automation"],"_links":{"self":[{"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/posts\/18327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/comments?post=18327"}],"version-history":[{"count":1,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/posts\/18327\/revisions"}],"predecessor-version":[{"id":18328,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/posts\/18327\/revisions\/18328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/media\/18326"}],"wp:attachment":[{"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/media?parent=18327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/categories?post=18327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-json\/wp\/v2\/tags?post=18327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}