{"id":18472,"date":"2026-07-19T07:19:33","date_gmt":"2026-07-18T22:19:33","guid":{"rendered":"https:\/\/genai-ai.co.jp\/ai-kanri\/?p=18472"},"modified":"2026-07-19T07:19:33","modified_gmt":"2026-07-18T22:19:33","slug":"cc-java-boolean","status":"publish","type":"post","link":"https:\/\/genai-ai.co.jp\/ai-kanri\/blog\/cc-java-boolean\/","title":{"rendered":"\u30102026\u5e747\u6708\u6700\u65b0\u3011Java\u306eboolean\u3068Boolean\u3092\u5b8c\u5168\u89e3\u8aac\uff5c\u521d\u671f\u5024\u30fbNullPointerException\u5bfe\u7b56\u30fbautoboxing\u3068Claude Code\u6d3b\u7528"},"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-boolean.jpg\" alt=\"\u30102026\u5e747\u6708\u6700\u65b0\u3011Java\u306eboolean\u3068Boolean\u3092\u5b8c\u5168\u89e3\u8aac\uff5c\u521d\u671f\u5024\u30fbNullPointerException\u5bfe\u7b56\u30fbautoboxing\u3068Claude Code\u6d3b\u7528\" 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 #0ea5e9;\">\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:#0ea5e9;font-weight:700;margin-right:8px;\">01<\/span>boolean\u3068Boolean\u306e\u57fa\u672c\u3068\u9055\u3044<\/a><\/li>\n    <li><a href=\"#sec-02\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">02<\/span>\u521d\u671f\u5024\u306e\u9055\u3044\uff08false vs null\uff09<\/a><\/li>\n    <li><a href=\"#sec-03\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">03<\/span>NullPointerException\u304c\u8d77\u304d\u308b\u7406\u7531\u3068\u5bfe\u7b56<\/a><\/li>\n    <li><a href=\"#sec-04\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">04<\/span>autoboxing\u30fbunboxing\u306e\u4ed5\u7d44\u307f<\/a><\/li>\n    <li><a href=\"#sec-05\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">05<\/span>Boolean\u306e\u30e1\u30bd\u30c3\u30c9\u6d3b\u7528\uff08parseBoolean\u30fbcompareTo\u30fbtoString\uff09<\/a><\/li>\n    <li><a href=\"#sec-06\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">06<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u30d1\u30bf\u30fc\u30f3\u3068\u5b9f\u52d9\u3067\u306e\u4f7f\u3044\u65b9<\/a><\/li>\n    <li><a href=\"#sec-07\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">07<\/span>Generics\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067Boolean\u304c\u5fc5\u8981\u306a\u7406\u7531<\/a><\/li>\n    <li><a href=\"#sec-08\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;font-weight:700;margin-right:8px;\">08<\/span>Claude Code\u3067Java\u306eboolean\u51e6\u7406\u3092\u81ea\u52d5\u751f\u6210\u3059\u308b<\/a><\/li>\n    <li><a href=\"#faq\" style=\"color:#495057;text-decoration:none;\"><span style=\"color:#0ea5e9;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\">Java\u306b\u306f<strong>boolean<\/strong>\uff08\u5c0f\u6587\u5b57\uff09\u3068<strong>Boolean<\/strong>\uff08\u5927\u6587\u5b57\uff09\u3068\u3044\u30462\u7a2e\u985e\u306e\u300c\u771f\u507d\u5024\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u898b\u540c\u3058\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u3053\u306e2\u3064\u306b\u306f\u521d\u671f\u5024\u30fbnull\u4ee3\u5165\u53ef\u80fd\u6027\u30fb\u30e1\u30bd\u30c3\u30c9\u306e\u6709\u7121\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u4f7f\u7528\u53ef\u5426\u306a\u3069\u91cd\u8981\u306a\u9055\u3044\u304c\u3042\u308a\u3001\u4f7f\u3044\u65b9\u3092\u8aa4\u308b\u3068NullPointerException\u306e\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001boolean\u3068Boolean\u306e\u6839\u672c\u7684\u306a\u9055\u3044\u30fb\u521d\u671f\u5024\u30fbNullPointerException\u304c\u8d77\u304d\u308b\u7406\u7531\u3068\u5bfe\u7b56\u30fbautoboxing\u306e\u4ed5\u7d44\u307f\u30fbBoolean\u306e\u30e1\u30bd\u30c3\u30c9\u6d3b\u7528\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067Boolean\u304c\u5fc5\u8981\u306a\u7406\u7531\u30fbClaude Code\u3067\u306e\u30b3\u30fc\u30c9\u81ea\u52d5\u751f\u6210\u307e\u3067\u89e3\u8aac\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\u3067NullPointerException\u304c\u8d77\u304d\u305f\u3068\u304d\u3001\u300cBoolean\u578b\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092if\u6587\u3067\u8a55\u4fa1\u3057\u305f\u3089\u843d\u3061\u305f\u300d\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u975e\u5e38\u306b\u591a\u3044\u3067\u3059\u3002Boolean\u306fnull\u306b\u306a\u308a\u3046\u308b\u53c2\u7167\u578b\u306a\u306e\u3067\u3001unboxing\u6642\u306bnull\u3060\u3068NPE\u304c\u767a\u751f\u3057\u307e\u3059\u3002boolean\u3068Boolean\u306e\u4f7f\u3044\u5206\u3051\u3092\u7406\u89e3\u3059\u308b\u3060\u3051\u3067\u9632\u3052\u308b\u30d0\u30b0\u3067\u3059\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>boolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09<\/strong>\u3068Boolean\uff08\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff09\u306e\u6839\u672c\u7684\u306a\u9055\u3044<\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e<strong>\u521d\u671f\u5024<\/strong>\u306e\u9055\u3044\uff08boolean\u306ffalse\u3001Boolean\u306fnull\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>NullPointerException<\/strong>\u304c\u8d77\u304d\u308b\u7406\u7531\u3068null\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5\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>autoboxing\u30fbunboxing<\/strong>\u3067\u81ea\u52d5\u5909\u63db\u3055\u308c\u308b\u4ed5\u7d44\u307f\u3068\u305d\u306e\u843d\u3068\u3057\u7a74<\/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>Boolean.<strong>parseBoolean<\/strong>\u30fbcompareTo\u30fbtoString\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>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u3057\u3066boolean\/Boolean\u3092<strong>\u4f7f\u3044\u5206\u3051\u308b<\/strong>\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>Generics\u30fb<strong>List&lt;Boolean&gt;<\/strong>\u3067\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u304c\u4f7f\u3048\u306a\u3044\u7406\u7531<\/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>\u3067Java\u306eboolean\u51e6\u7406\u30b3\u30fc\u30c9\u3092\u81ea\u52d5\u751f\u6210\u3059\u308b\u65b9\u6cd5<\/span><\/div>\n\n<\/div>\n\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;\">BASIC<\/span>\n  <span class=\"section-title\" style=\"display:block;\">boolean\u3068Boolean\u306e\u57fa\u672c\u3068\u9055\u3044<\/span>\n  <span class=\"section-desc\">\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3068\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u6839\u672c\u7684\u306a\u5dee\u7570<\/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;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3068\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9<\/strong>\uff1aJava\u306b\u306fint\u30fbboolean\u30fbchar\u306a\u3069\u306e\u300c\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08\u57fa\u672c\u30c7\u30fc\u30bf\u578b\uff09\u300d\u3068\u3001\u305d\u308c\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u6271\u3046\u305f\u3081\u306e\u300c\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff08Integer\u30fbBoolean\u30fbCharacter\uff09\u300d\u304c\u3042\u308b\u3002\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u5024\u3092\u30b9\u30bf\u30c3\u30af\u30e1\u30e2\u30ea\u306b\u76f4\u63a5\u683c\u7d0d\u3057\u3001\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u305f\u3081\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u306b\u683c\u7d0d\u3055\u308c\u3066\u305d\u306e\u53c2\u7167\u3092\u4fdd\u6301\u3059\u308b\u3002\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u306fnull\u3092\u4fdd\u6301\u3067\u304d\u308b\u304c\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u3067\u304d\u306a\u3044\u3002\u307e\u305f\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u306b\u306fparseXxx()\u30fbcompareTo()\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ boolean: \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\nboolean flag1 = true;   \/\/ true\u307e\u305f\u306ffalse\u306e\u5024\nboolean flag2 = false;  \/\/ null\u306f\u4ee3\u5165\u3067\u304d\u306a\u3044\n\/\/ boolean flag3 = null;   \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff01\n\n\/\/ Boolean: \u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\nBoolean Flag1 = true;   \/\/ autoboxing\u3067Boolean.TRUE\nBoolean Flag2 = false;  \/\/ autoboxing\u3067Boolean.FALSE\nBoolean Flag3 = null;   \/\/ null\u3092\u4fdd\u6301\u3067\u304d\u308b\n\n\/\/ \u578b\u306e\u78ba\u8a8d\nSystem.out.println(boolean.class);   \/\/ boolean\uff08\u5b58\u5728\u3057\u306a\u3044\u51fa\u529b\uff09\nSystem.out.println(Boolean.class);   \/\/ class java.lang.Boolean\n\n\/\/ Boolean\u5b9a\u6570\nSystem.out.println(Boolean.TRUE);    \/\/ true\nSystem.out.println(Boolean.FALSE);   \/\/ false\n\n\/\/ \u7b49\u5024\u6bd4\u8f03\u306e\u6ce8\u610f\nBoolean b1 = new Boolean(true);  \/\/ \u63a8\u5968\u3055\u308c\u306a\u3044\u66f8\u304d\u65b9\nBoolean b2 = new Boolean(true);\nSystem.out.println(b1 == b2);     \/\/ false\uff08\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\nSystem.out.println(b1.equals(b2)); \/\/ true\uff08\u5024\u306e\u6bd4\u8f03\uff09\n\n\/\/ Boolean.valueOf()\u3092\u4f7f\u3046\u3079\u304d\nBoolean b3 = Boolean.valueOf(true);  \/\/ Boolean.TRUE\u3092\u8fd4\u3059\uff08\u540c\u4e00\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\nBoolean b4 = Boolean.valueOf(true);\nSystem.out.println(b3 == b4); \/\/ true\uff08\u540c\u4e00\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09<\/pre>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u6bd4\u8f03\u8ef8<\/th><th>boolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09<\/th><th>Boolean\uff08\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff09<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>\u578b\u306e\u7a2e\u5225<\/td><td>\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b<\/td><td>\u53c2\u7167\u578b\uff08\u30af\u30e9\u30b9\uff09<\/td><\/tr>\n<tr><td>\u53d6\u308a\u3046\u308b\u5024<\/td><td>true\u307e\u305f\u306ffalse\u306e\u307f<\/td><td>true\u30fbfalse\u30fbnull<\/td><\/tr>\n<tr><td>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5024<\/td><td>false<\/td><td>null<\/td><\/tr>\n<tr><td>\u30e1\u30e2\u30ea<\/td><td>\u30b9\u30bf\u30c3\u30af\uff08\u5024\u3092\u76f4\u63a5\u4fdd\u6301\uff09<\/td><td>\u30d2\u30fc\u30d7\uff08\u53c2\u7167\u3092\u4fdd\u6301\uff09<\/td><\/tr>\n<tr><td>\u30e1\u30bd\u30c3\u30c9<\/td><td>\u306a\u3057<\/td><td>parseBoolean\u30fbcompareTo\u7b49<\/td><\/tr>\n<tr><td>Generics\u3067\u306e\u4f7f\u7528<\/td><td>\u4e0d\u53ef<\/td><td>\u53ef\uff08List&lt;Boolean&gt;\uff09<\/td><\/tr>\n<tr><td>null\u30c1\u30a7\u30c3\u30af<\/td><td>\u4e0d\u8981<\/td><td>\u5fc5\u8981\uff08NPE\u306b\u6ce8\u610f\uff09<\/td><\/tr>\n<\/tbody>\n<\/table>\n\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;\">INIT<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u521d\u671f\u5024\u306e\u9055\u3044\uff08false vs null\uff09<\/span>\n  <span class=\"section-desc\">\u30af\u30e9\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3067\u306e\u6319\u52d5\u306e\u5dee<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ \u30af\u30e9\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5024\npublic class BooleanExample {\n    boolean primitiveFlag;  \/\/ \u521d\u671f\u5024: false\n    Boolean wrapperFlag;    \/\/ \u521d\u671f\u5024: null\n\n    public void printInitialValues() {\n        System.out.println(\"primitiveFlag: \" + primitiveFlag);  \/\/ false\n        System.out.println(\"wrapperFlag: \" + wrapperFlag);      \/\/ null\n\n        \/\/ boolean\u306fif\u6587\u3067\u305d\u306e\u307e\u307e\u4f7f\u3048\u308b\n        if (primitiveFlag) {\n            System.out.println(\"true\");\n        } else {\n            System.out.println(\"false\"); \/\/ \u3053\u3061\u3089\u304c\u51fa\u529b\u3055\u308c\u308b\n        }\n\n        \/\/ Boolean\u306fnull\u30c1\u30a7\u30c3\u30af\u306a\u3057\u3067NPE\u306b\u306a\u308b\n        \/\/ if (wrapperFlag) { ... } \/\/ \u2190 NullPointerException\uff01\n        if (wrapperFlag != null && wrapperFlag) {\n            System.out.println(\"true\");\n        } else {\n            System.out.println(\"null or false\"); \/\/ \u3053\u3061\u3089\u304c\u51fa\u529b\n        }\n    }\n}\n\n\/\/ \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306f\u521d\u671f\u5024\u306a\u3057\uff08\u4f7f\u7528\u524d\u306b\u4ee3\u5165\u5fc5\u9808\uff09\npublic void localExample() {\n    boolean localBool;\n    \/\/ System.out.println(localBool); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff08\u672a\u521d\u671f\u5316\uff09\n\n    boolean localBool2 = false;  \/\/ \u660e\u793a\u7684\u306b\u521d\u671f\u5316\n    System.out.println(localBool2); \/\/ false\n}<\/pre>\n<\/div>\n\n\n\n<div style=\"background:#f0fdf4;border:1px solid #22c55e;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:18px;\">&#128161;<\/span>\n    <strong style=\"color:#16a34a;font-size:15px;\">\u30af\u30e9\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306eboolean\u3068Boolean\u306e\u9078\u629e\u57fa\u6e96<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">\u30af\u30e9\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5834\u5408\u3001\u300c\u672a\u8a2d\u5b9a\u72b6\u614b\uff08null\uff09\u3092\u8868\u73fe\u3057\u305f\u3044\u304b\u300d\u3067\u4f7f\u3044\u5206\u3051\u307e\u3059\u3002\u30d5\u30e9\u30b0\u304c\u5fc5\u305atrue\/false\u306e\u3069\u3061\u3089\u304b\u3092\u6301\u3064\u5834\u5408\u306fboolean\u3092\u3001\u300c\u307e\u3060\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\uff08\u672a\u6c7a\u5b9a\uff09\u300d\u3068\u3044\u3046\u7b2c3\u306e\u72b6\u614b\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u306fBoolean\u3092\u4f7f\u3044\u307e\u3059\u3002Boolean\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u5e38\u306bnull\u30c1\u30a7\u30c3\u30af\u3092\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\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;\">NPE<\/span>\n  <span class=\"section-title\" style=\"display:block;\">NullPointerException\u304c\u8d77\u304d\u308b\u7406\u7531\u3068\u5bfe\u7b56<\/span>\n  <span class=\"section-desc\">Boolean\u306eunboxing\u3067null\u304cNPE\u306b\u306a\u308b\u30e1\u30ab\u30cb\u30ba\u30e0<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#fef2f2;border:2px solid #dc2626;border-radius:8px;padding:20px 24px;margin:24px 0;\">\n  <div style=\"display:flex;align-items:center;gap:8px;margin-bottom:12px;\">\n    <span style=\"font-size:20px;\">&#9888;&#65039;<\/span>\n    <strong style=\"color:#dc2626;font-size:16px;\">Boolean\u306enull\u3092unboxing\u3059\u308b\u3068NullPointerException\u304c\u767a\u751f\u3059\u308b<\/strong>\n  <\/div>\n  <p style=\"margin:0;font-size:15px;line-height:1.8;color:#333;\">Boolean\u304cnull\u306e\u72b6\u614b\u3067if\u6587\uff08boolean\u8a55\u4fa1\uff09\u3084boolean\u5909\u6570\u3078\u306e\u4ee3\u5165\u3092\u884c\u3046\u3068\u3001Java\u306f\u81ea\u52d5\u7684\u306bunboxing\uff08Boolean\u2192boolean\u5909\u63db\uff09\u3092\u8a66\u307f\u307e\u3059\u3002\u3057\u304b\u3057null\u306fboolean\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u305f\u3081\u3001NullPointerException\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u300c\u306a\u305c\u304bNPE\u304c\u51fa\u308b\u300d\u3068\u3044\u3046\u5834\u5408\u3001Boolean\u30d5\u30a3\u30fc\u30eb\u30c9\u304cnull\u306e\u307e\u307eunboxing\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ NullPointerException\u304c\u8d77\u304d\u308b\u30d1\u30bf\u30fc\u30f3\n\n\/\/ \u30d1\u30bf\u30fc\u30f31: if\u6587\u3067\u306eunboxing\nBoolean flag = null;\nif (flag) { \/* NullPointerException! *\/ }\nif (flag == true) { \/* NullPointerException! (==\u3067\u3082unboxing\u304c\u8d77\u304d\u308b) *\/ }\n\n\/\/ \u30d1\u30bf\u30fc\u30f32: boolean\u3078\u306e\u4ee3\u5165\uff08unboxing\uff09\nBoolean boolObj = null;\nboolean b = boolObj; \/\/ NullPointerException!\n\n\/\/ \u30d1\u30bf\u30fc\u30f33: \u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\npublic boolean isActive() {\n    Boolean active = findStatus(); \/\/ null\u3092\u8fd4\u3059\u5834\u5408\u304c\u3042\u308b\n    return active; \/\/ null\u306a\u3089NPE\uff01\n}\n\n\/\/ === NPE\u5bfe\u7b56 ===\n\n\/\/ \u5bfe\u7b561: null\u30c1\u30a7\u30c3\u30af\u3092\u5148\u306b\nBoolean flag2 = null;\nif (flag2 != null && flag2) {\n    System.out.println(\"true\u306e\u5834\u5408\u306e\u51e6\u7406\");\n}\n\n\/\/ \u5bfe\u7b562: Boolean.TRUE.equals()\u3092\u4f7f\u3046\n\/\/ flag2\u304cnull\u3067\u3082\u4f8b\u5916\u304c\u51fa\u306a\u3044\nif (Boolean.TRUE.equals(flag2)) {\n    System.out.println(\"true\u306e\u5834\u5408\u306e\u51e6\u7406\");\n}\n\n\/\/ \u5bfe\u7b563: Objects.equals()\u3092\u4f7f\u3046\uff08Java7\u4ee5\u964d\uff09\nimport java.util.Objects;\nBoolean b1 = null;\nBoolean b2 = Boolean.TRUE;\nSystem.out.println(Objects.equals(b1, Boolean.TRUE)); \/\/ false\uff08NPE\u306a\u3057\uff09\nSystem.out.println(Objects.equals(b2, Boolean.TRUE)); \/\/ true\n\n\/\/ \u5bfe\u7b564: Optional\uff08Java8\u4ee5\u964d\uff09\nOptional<Boolean> opt = Optional.ofNullable(flag2);\nboolean result = opt.orElse(false); \/\/ null\u306e\u5834\u5408\u306ffalse\u3068\u3057\u3066\u6271\u3046<\/pre>\n<\/div>\n\n\n\n<div class=\"g-flow-row\" style=\"margin:24px 0;\">\n  <div class=\"g-flow-item\"><strong>Boolean\u304cnull<\/strong><br><span style=\"font-size:12px;\">null\u3092\u53c2\u7167\u3059\u308bBoolean<br>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>if(Boolean)\u307e\u305f\u306fbool\u4ee3\u5165<\/strong><br><span style=\"font-size:12px;\">Java\u304cunboxing\u3092\u8a66\u307f\u308b<br>null.booleanValue()<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>NullPointerException\u767a\u751f<\/strong><br><span style=\"font-size:12px;\">null\u306e\u30e1\u30bd\u30c3\u30c9\u306f<br>\u547c\u3073\u51fa\u305b\u306a\u3044<\/span><\/div>\n  <div class=\"g-flow-arrow\">&#8594;<\/div>\n  <div class=\"g-flow-item\"><strong>\u5bfe\u7b56: null\u30c1\u30a7\u30c3\u30af\u5148\u884c<\/strong><br><span style=\"font-size:12px;\">Boolean.TRUE.equals()<br>\u307e\u305f\u306fnull!=\u78ba\u8a8d<\/span><\/div>\n<\/div>\n\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;\">AUTOBOXING<\/span>\n  <span class=\"section-title\" style=\"display:block;\">autoboxing\u30fbunboxing\u306e\u4ed5\u7d44\u307f<\/span>\n  <span class=\"section-desc\">Java\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u3067\u578b\u5909\u63db\u3059\u308b\u4ed5\u7d44\u307f\u3068\u843d\u3068\u3057\u7a74<\/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;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>autoboxing\u3068unboxing<\/strong>\uff1aautoboxing\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u304b\u3089\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u3078\u306e\u81ea\u52d5\u5909\u63db\uff08boolean\u2192Boolean\uff09\u3002unboxing\u306f\u305d\u306e\u9006\uff08Boolean\u2192boolean\uff09\u3002Java5\u304b\u3089\u5c0e\u5165\u3055\u308c\u305f\u6a5f\u80fd\u3067\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u7684\u306b\u5909\u63db\u30b3\u30fc\u30c9\u3092\u633f\u5165\u3059\u308b\u3002autoboxing\u306b\u3088\u308aList&lt;Boolean&gt;\u306bboolean\u5024\u3092\u76f4\u63a5add\u3057\u305f\u308a\u3001Boolean\u30d1\u30e9\u30e1\u30fc\u30bf\u306btrue\u3092\u305d\u306e\u307e\u307e\u308f\u305f\u3057\u305f\u308a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002\u305f\u3060\u3057unboxing\u6642\u306bnull\u304c\u3042\u308b\u3068NullPointerException\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u3001Boolean\u304cnull\u306b\u306a\u308a\u3046\u308b\u5834\u5408\u306f\u660e\u793a\u7684\u306anull\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ autoboxing\u3068unboxing\u306e\u4f8b\n\n\/\/ autoboxing: boolean \u2192 Boolean\uff08\u81ea\u52d5\uff09\nboolean primitive = true;\nBoolean wrapper = primitive; \/\/ autoboxing\uff08Boolean.valueOf(true)\u304c\u633f\u5165\u3055\u308c\u308b\uff09\n\n\/\/ unboxing: Boolean \u2192 boolean\uff08\u81ea\u52d5\uff09\nBoolean wrapper2 = Boolean.TRUE;\nboolean primitive2 = wrapper2; \/\/ unboxing\uff08wrapper2.booleanValue()\u304c\u633f\u5165\u3055\u308c\u308b\uff09\n\n\/\/ List\u3078\u306eautoboxing\nList<Boolean> list = new ArrayList<>();\nlist.add(true);  \/\/ autoboxing: Boolean.valueOf(true)\u3067\u8ffd\u52a0\nlist.add(false); \/\/ autoboxing: Boolean.valueOf(false)\u3067\u8ffd\u52a0\n\nboolean retrieved = list.get(0); \/\/ unboxing: booleanValue\u304c\u547c\u3070\u308c\u308b\n\n\/\/ \u30e1\u30bd\u30c3\u30c9\u5f15\u6570\u306eautoboxing\npublic void process(Boolean flag) { \/* ... *\/ }\n\nprocess(true);  \/\/ autoboxing: Boolean.valueOf(true)\u304c\u6e21\u3055\u308c\u308b\nprocess(false); \/\/ autoboxing: Boolean.valueOf(false)\u304c\u6e21\u3055\u308c\u308b\nprocess(null);  \/\/ null\u3092\u305d\u306e\u307e\u307e\u6e21\u305b\u308b\n\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6ce8\u610f: \u30eb\u30fc\u30d7\u5185\u3067\u306eautoboxing\u306f\u907f\u3051\u308b\n\/\/ \u60aa\u3044\u4f8b\uff08\u6bce\u56deautoboxing\u304c\u767a\u751f\uff09\nBoolean total = false;\nfor (int i = 0; i < 1000; i++) {\n    total = total || checkCondition(i); \/\/ \u6bce\u56deunboxing+autoboxing\n}\n\n\/\/ \u826f\u3044\u4f8b\nboolean totalPrim = false;\nfor (int i = 0; i < 1000; i++) {\n    totalPrim = totalPrim || checkCondition(i); \/\/ \u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u306e\u307e\u307e\u51e6\u7406\n}\nBoolean result = totalPrim; \/\/ \u6700\u5f8c\u306b1\u56de\u3060\u3051autoboxing<\/pre>\n<\/div>\n\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;\">METHODS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Boolean\u306e\u30e1\u30bd\u30c3\u30c9\u6d3b\u7528\uff08parseBoolean\u30fbcompareTo\u30fbtoString\uff09<\/span>\n  <span class=\"section-desc\">String\u2192boolean\u5909\u63db\u30fb\u6bd4\u8f03\u30fb\u6587\u5b57\u5217\u5316\u306e\u5b9f\u88c5<\/span>\n<\/h2>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ Boolean.parseBoolean(): String\u304b\u3089boolean\u3078\u306e\u5909\u63db\nboolean b1 = Boolean.parseBoolean(\"true\");     \/\/ true\nboolean b2 = Boolean.parseBoolean(\"TRUE\");     \/\/ true\uff08\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u7121\u8996\uff09\nboolean b3 = Boolean.parseBoolean(\"True\");     \/\/ true\nboolean b4 = Boolean.parseBoolean(\"false\");    \/\/ false\nboolean b5 = Boolean.parseBoolean(\"1\");        \/\/ false\uff08\"true\"\u4ee5\u5916\u306ffalse\uff09\nboolean b6 = Boolean.parseBoolean(\"yes\");      \/\/ false\nboolean b7 = Boolean.parseBoolean(null);       \/\/ false\uff08\u4f8b\u5916\u306f\u51fa\u306a\u3044\uff01\uff09\n\nSystem.out.println(\"\"true\" -> \" + b1);   \/\/ true\nSystem.out.println(\"\"1\" -> \" + b4);      \/\/ false\nSystem.out.println(\"null -> \" + b7);        \/\/ false\n\n\/\/ Boolean.valueOf(): String or boolean\u304b\u3089Boolean\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\nBoolean bw1 = Boolean.valueOf(\"true\");   \/\/ Boolean.TRUE\nBoolean bw2 = Boolean.valueOf(false);    \/\/ Boolean.FALSE\n\n\/\/ compareTo(): Boolean\u540c\u58eb\u306e\u6bd4\u8f03\uff08Comparable\u306e\u5b9f\u88c5\uff09\nBoolean x = Boolean.TRUE;\nBoolean y = Boolean.FALSE;\nint cmp = x.compareTo(y); \/\/ \u6b63\u306e\u5024\uff08true\u306ffalse\u3088\u308a\u5927\uff09\nSystem.out.println(cmp);  \/\/ 1\n\n\/\/ Boolean\u306e\u30bd\u30fc\u30c8\nList<Boolean> bools = Arrays.asList(true, false, true, false, true);\nCollections.sort(bools); \/\/ [false, false, true, true, true]\nSystem.out.println(bools);\n\n\/\/ toString(): boolean\u3092String\u306b\u5909\u63db\nString s1 = Boolean.toString(true);    \/\/ \"true\"\nString s2 = Boolean.toString(false);   \/\/ \"false\"\nString s3 = String.valueOf(true);      \/\/ \"true\"\uff08\u540c\u7b49\uff09\nboolean b8 = Boolean.parseBoolean(s1); \/\/ \u6587\u5b57\u5217\u3092\u623b\u3059<\/pre>\n<\/div>\n\n\n\n<div class=\"balloon-wrap is-right\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/yamazaki-avatar.png\" alt=\"AI\u9b3c\u7ba1\u7406\u5c71\u5d0e\">\n    <span class=\"balloon-name\">AI\u9b3c\u7ba1\u7406\u5c71\u5d0e<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Boolean.parseBoolean(null)\u304cfalse\u3092\u8fd4\u3059\uff08\u4f8b\u5916\u304c\u51fa\u306a\u3044\uff09\u306e\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u300cnull\u3068false\u3092\u533a\u5225\u3057\u305f\u3044\u5834\u5408\u300d\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u300c\u8a2d\u5b9a\u304c\u660e\u793a\u7684\u306bfalse\u306a\u306e\u304b\u3001\u307e\u3060\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u304b\u300d\u3092\u533a\u5225\u3057\u305f\u3044\u5834\u5408\u306f\u3001Boolean.valueOf\u3067Boolean\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5316\u3057\u3066null\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/div>\n<\/div>\n\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;\">RETURN<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u30d1\u30bf\u30fc\u30f3\u3068\u5b9f\u52d9\u3067\u306e\u4f7f\u3044\u65b9<\/span>\n  <span class=\"section-desc\">boolean vs Boolean \u3092\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306b\u9078\u3076\u57fa\u6e96<\/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;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u4e09\u5024\u8ad6\u7406\uff08Ternary Logic\uff09<\/strong>\uff1atrue\u30fbfalse\u30fbunknown\u306e3\u72b6\u614b\u3092\u6271\u3046\u8ad6\u7406\u4f53\u7cfb\u3002Java\u306eboolean\u306f\u4e8c\u5024\uff08true\/false\uff09\u3057\u304b\u6301\u3066\u306a\u3044\u304c\u3001Boolean\u306fnull\u3092\u8ffd\u52a0\u3057\u305f\u4e09\u5024\u8ad6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u308b\u3002\u300c\u51e6\u7406\u304c\u6210\u529f\u3057\u305f\u304b\uff08true\uff09\u3001\u5931\u6557\u3057\u305f\u304b\uff08false\uff09\u3001\u307e\u3060\u51e6\u7406\u3055\u308c\u3066\u3044\u306a\u3044\u304b\uff08null\/unknown\uff09\u300d\u306e\u3088\u3046\u306a\u5834\u5408\u306bBoolean\u623b\u308a\u5024\u304c\u6709\u52b9\u3002\u305f\u3060\u3057\u4e00\u822c\u7684\u306b\u306f\u4e09\u5024\u8ad6\u7406\u306f\u6df7\u4e71\u306e\u5143\u306b\u306a\u308b\u305f\u3081\u3001Enum\u3084Optional&lt;Boolean&gt;\u3067\u660e\u793a\u7684\u306b\u72b6\u614b\u3092\u8868\u73fe\u3059\u308b\u65b9\u304c\u591a\u3044\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ \u623b\u308a\u5024\u30d1\u30bf\u30fc\u30f31: \u5e38\u306btrue\/false\u3092\u8fd4\u3059\u2192boolean\uff08\u63a8\u5968\uff09\npublic boolean isValid(String input) {\n    if (input == null || input.isEmpty()) {\n        return false; \/\/ null\u3084\u7a7a\u6587\u5b57\u306ffalse\n    }\n    return input.length() >= 3;\n}\n\n\/\/ \u623b\u308a\u5024\u30d1\u30bf\u30fc\u30f32: \u300c\u672a\u78ba\u5b9a\u300d\u72b6\u614b\u3092\u8fd4\u3057\u305f\u3044\u2192Boolean\npublic Boolean findFlag(int id) {\n    \/\/ DB\u304b\u3089\u8a2d\u5b9a\u5024\u3092\u53d6\u5f97\uff08\u672a\u8a2d\u5b9a\u306e\u5834\u5408\u306fnull\uff09\n    Row row = db.findById(id);\n    if (row == null) {\n        return null; \/\/ \u672a\u8a2d\u5b9a\u72b6\u614b\n    }\n    return row.getBoolean(\"flag\"); \/\/ true or false\n}\n\n\/\/ \u547c\u3073\u51fa\u3057\u5074\u306enull\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\nBoolean result = findFlag(42);\nif (Boolean.TRUE.equals(result)) {\n    System.out.println(\"true\");\n} else if (Boolean.FALSE.equals(result)) {\n    System.out.println(\"false\");\n} else {\n    System.out.println(\"\u672a\u8a2d\u5b9a\"); \/\/ result == null\n}\n\n\/\/ \u30d1\u30bf\u30fc\u30f33: Optional<Boolean>\uff08Java8\u63a8\u5968\uff09\npublic Optional<Boolean> getStatus(int id) {\n    Row row = db.findById(id);\n    if (row == null) return Optional.empty();\n    return Optional.of(row.getBoolean(\"status\"));\n}\n\/\/ \u547c\u3073\u51fa\u3057\nOptional<Boolean> status = getStatus(42);\nboolean isActive = status.orElse(false); \/\/ \u672a\u8a2d\u5b9a\u306ffalse\u3068\u3057\u3066\u6271\u3046<\/pre>\n<\/div>\n\n\n\n<table>\n<thead><tr><th>\u4f7f\u3044\u5206\u3051\u30d1\u30bf\u30fc\u30f3<\/th><th>\u63a8\u5968\u3059\u308b\u578b<\/th><th>\u7406\u7531<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>true\u304bfalse\u5fc5\u305a\u8fd4\u3059<\/td><td>boolean<\/td><td>null\u306e\u53ef\u80fd\u6027\u304c\u306a\u3044\u30fb\u7c21\u6f54<\/td><\/tr>\n<tr><td>\u672a\u8a2d\u5b9a\/\u672a\u78ba\u5b9a\u3092\u8868\u73fe\u3057\u305f\u3044<\/td><td>Boolean\uff08\u307e\u305f\u306fOptional\uff09<\/td><td>null\u3067\u7b2c3\u72b6\u614b\u3092\u8868\u73fe<\/td><\/tr>\n<tr><td>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u683c\u7d0d\u3059\u308b<\/td><td>Boolean<\/td><td>Generics\u306b\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u4e0d\u53ef<\/td><\/tr>\n<tr><td>\u5f15\u6570\u3067null\u3092\u53d7\u3051\u5165\u308c\u308b<\/td><td>Boolean<\/td><td>null=\u30c7\u30d5\u30a9\u30eb\u30c8\u52d5\u4f5c\u306e\u5834\u5408<\/td><\/tr>\n<tr><td>\u9ad8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5fc5\u8981<\/td><td>boolean<\/td><td>autoboxing\u30b3\u30b9\u30c8\u304c\u306a\u3044<\/td><\/tr>\n<\/tbody>\n<\/table>\n\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;\">GENERICS<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Generics\u30fb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3067Boolean\u304c\u5fc5\u8981\u306a\u7406\u7531<\/span>\n  <span class=\"section-desc\">List&lt;boolean&gt;\u306f\u66f8\u3051\u306a\u3044\u3002\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u306f\u30e9\u30c3\u30d1\u30fc\u578b\u3092\u4f7f\u3046<\/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;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>Java\u306e\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\uff08Generics\uff09\u3068\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306e\u5236\u7d04<\/strong>\uff1aJava\u306eGenerics\uff08List&lt;T&gt;\u30fbMap&lt;K,V&gt;\u306a\u3069\u306e\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3057\u304b\u53d7\u3051\u4ed8\u3051\u305a\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08boolean\u30fbint\u30fbdouble\u7b49\uff09\u306f\u4f7f\u3048\u306a\u3044\u3002\u3053\u308c\u306fJava\u306eGenerics\u304c\u300c\u578b\u6d88\u53bb\uff08Type Erasure\uff09\u300d\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3067\u5b9f\u88c5\u3055\u308c\u3066\u304a\u308a\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u5f8c\u306f\u3059\u3079\u3066Object\u306b\u306a\u308b\u305f\u3081\u3001\u30b9\u30bf\u30c3\u30af\u306b\u683c\u7d0d\u3055\u308c\u308b\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u304c\u6271\u3048\u306a\u3044\u3068\u3044\u3046\u5236\u7d04\u306b\u3088\u308b\u3002\u3057\u305f\u304c\u3063\u3066List&lt;boolean&gt;\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u3001List&lt;Boolean&gt;\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n\n\n\n<div style=\"background:#1e1e1e;border-radius:8px;padding:20px 24px;margin:20px 0;overflow-x:auto;\">\n  <pre style=\"margin:0;color:#d4d4d4;font-size:13px;line-height:1.8;font-family:'Consolas','Courier New',monospace;white-space:pre;\">\/\/ Generics\u306b\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u4f7f\u3048\u306a\u3044\n\/\/ List<boolean> list = new ArrayList<>();  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff01\n\n\/\/ \u30e9\u30c3\u30d1\u30fc\u578b\u3092\u4f7f\u3046\nList<Boolean> boolList = new ArrayList<>();\nboolList.add(true);   \/\/ autoboxing\nboolList.add(false);  \/\/ autoboxing\nboolList.add(null);   \/\/ null\u3082\u8ffd\u52a0\u3067\u304d\u308b\uff08\u8981\u6ce8\u610f\uff09\n\n\/\/ Map\u306evalue\u306b\u3082\nMap<String, Boolean> flagMap = new HashMap<>();\nflagMap.put(\"active\", true);   \/\/ autoboxing\nflagMap.put(\"deleted\", false); \/\/ autoboxing\nflagMap.put(\"pending\", null);  \/\/ null\u304c\u5165\u308b\u3053\u3068\u304c\u3042\u308b\n\n\/\/ Map\u304b\u3089\u306e\u53d6\u5f97\u3068null\u30c1\u30a7\u30c3\u30af\nBoolean activeFlag = flagMap.get(\"active\");\nif (Boolean.TRUE.equals(activeFlag)) {\n    System.out.println(\"\u30a2\u30af\u30c6\u30a3\u30d6\");\n}\n\n\/\/ containsValue\u306e\u6ce8\u610f: null\u304c\u5165\u3063\u3066\u3044\u308b\u5834\u5408\nSystem.out.println(flagMap.containsValue(null)); \/\/ true\n\n\/\/ Stream<Boolean>\nList<Boolean> results = Arrays.asList(true, false, true, null);\nlong trueCount = results.stream()\n    .filter(Boolean.TRUE::equals) \/\/ nullsafe\n    .count();\nSystem.out.println(\"true\u306e\u6570: \" + trueCount); \/\/ 2<\/pre>\n<\/div>\n\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;\">AI_ASSIST<\/span>\n  <span class=\"section-title\" style=\"display:block;\">Claude Code\u3067Java\u306eboolean\u51e6\u7406\u3092\u81ea\u52d5\u751f\u6210\u3059\u308b<\/span>\n  <span class=\"section-desc\">null\u5b89\u5168\u306aBoolean\u51e6\u7406\u30fb\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30fb\u5909\u63db\u30b3\u30fc\u30c9\u304c\u5373\u751f\u6210<\/span>\n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Claude Code<\/strong>\u3092\u4f7f\u3048\u3070\u3001\u300cBoolean\u30d5\u30a3\u30fc\u30eb\u30c9\u306enull\u30c1\u30a7\u30c3\u30af\u3092Optional\u5bfe\u5fdc\u3067\u5b9f\u88c5\u3057\u3066\u307b\u3057\u3044\u300d\u300cMap\u304b\u3089boolean\u30d5\u30e9\u30b0\u3092\u5b89\u5168\u306b\u53d6\u5f97\u3057\u305f\u3044\u300d\u3068\u3044\u3063\u305f\u65e5\u672c\u8a9e\u306e\u6307\u793a\u3067Java\u30b3\u30fc\u30c9\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<table>\n<thead><tr><th>\u3084\u308a\u305f\u3044\u3053\u3068<\/th><th>Claude Code\u3078\u306e\u6307\u793a\u4f8b<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>null\u5b89\u5168\u306aBoolean\u5224\u5b9a<\/td><td>\u300cBoolean\u30d5\u30a3\u30fc\u30eb\u30c9\u304cnull\u306e\u3068\u304d\u306ffalse\u3068\u3057\u3066\u6271\u3046null\u5b89\u5168\u306aif\u306e\u66f8\u304d\u65b9\u3092Java\u3067\u793a\u3057\u3066\u3002Boolean.TRUE.equals\u3092\u4f7f\u3063\u3066\u3002\u300d<\/td><\/tr>\n<tr><td>String\u2192boolean\u5909\u63db<\/td><td>\u300c\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u6587\u5b57\u5217\uff08\"true\"\/\"false\"\/\"1\"\/\"0\"\/\"yes\"\/\"no\"\u7b49\uff09\u3092boolean\u306b\u5909\u63db\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092Java\u3067\u66f8\u3044\u3066\u3002\u300d<\/td><\/tr>\n<tr><td>Map\u306eboolean\u5b89\u5168\u53d6\u5f97<\/td><td>\u300cMap&lt;String,Boolean&gt;\u304b\u3089\u5b89\u5168\u306bboolean\u3092\u53d6\u5f97\u3059\u308b\u30e1\u30bd\u30c3\u30c9\uff08\u30ad\u30fc\u304c\u306a\u3044\u30fbnull\u306e\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u3059\uff09\u3092Java\u3067\u5b9f\u88c5\u3057\u3066\u3002\u300d<\/td><\/tr>\n<tr><td>\u4e09\u5024\u30ed\u30b8\u30c3\u30af\u8a2d\u8a08<\/td><td>\u300ctrue\u30fbfalse\u30fb\u672a\u8a2d\u5b9a\u306e3\u72b6\u614b\u3092\u6271\u3046Java\u306e\u30d5\u30e9\u30b0\u7ba1\u7406\u30af\u30e9\u30b9\u3092Optional&lt;Boolean&gt;\u3067\u8a2d\u8a08\u3057\u3066\u3002\u300d<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n\n\n<div class=\"balloon-wrap\">\n  <div class=\"balloon-icon\">\n    <img decoding=\"async\" src=\"https:\/\/genai-ai.co.jp\/ai-kanri\/wp-content\/uploads\/2026\/04\/ceo-sugasawa.jpg\" alt=\"\u4ee3\u8868\u83c5\u6fa4\">\n    <span class=\"balloon-name\">\u4ee3\u8868\u83c5\u6fa4<\/span>\n  <\/div>\n  <div class=\"balloon-body\">Claude Code\u306fboolean\u306e\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\uff08null\u306eunboxing\u30fb==\u3067\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6bd4\u8f03\uff09\u3082\u6307\u6458\u3057\u306a\u304c\u3089\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u300cNPE\u304c\u8d77\u304d\u3066\u3044\u308b\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u3066\u3001\u539f\u56e0\u3068\u4fee\u6b63\u3092\u6559\u3048\u3066\u300d\u3068\u3044\u3046\u4f7f\u3044\u65b9\u3082\u975e\u5e38\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<\/div>\n<\/div>\n\n\n\n<div style=\"background:#f8f9fa;border-left:4px solid #6b7280;border-radius:0 8px 8px 0;padding:16px 20px;margin:20px 0;\">\n  <p style=\"margin:0 0 4px;font-size:13px;font-weight:700;color:#6b7280;letter-spacing:1px;\">&#128218; \u7528\u8a9e\u89e3\u8aac<\/p>\n  <p style=\"margin:0;font-size:15px;line-height:1.7;\"><strong>\u578b\u6d88\u53bb\uff08Type Erasure\uff09<\/strong>\uff1aJava\u306eGenerics\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u578b\u60c5\u5831\u3092\u53d6\u308a\u9664\u3044\u3066\u5168\u3066<code>Object<\/code>\u3068\u3057\u3066\u6271\u3046\u4ed5\u7d44\u307f\u3002\u3053\u306e\u305f\u3081List&lt;Boolean&gt;\u3068List&lt;Integer&gt;\u306f\u5b9f\u884c\u6642\u306b\u306f\u540c\u4e00\u306e\u578b\u306b\u306a\u308b\u3002\u578b\u6d88\u53bb\u306b\u3088\u308a\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08int\u30fbboolean\u7b49\uff09\u306fObject\u306b\u5909\u63db\u3067\u304d\u306a\u3044\u305f\u3081Generics\u306b\u4f7f\u3048\u305a\u3001\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff08Integer\u30fbBoolean\u7b49\uff09\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u3002Java5\u3067autoboxing\u304c\u5c0e\u5165\u3055\u308c\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u5024\u3068\u30e9\u30c3\u30d1\u30fc\u306e\u76f8\u4e92\u5909\u63db\u304c\u81ea\u52d5\u5316\u3055\u308c\u305f\u3053\u3068\u3067\u3001Generics\u3068\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3092\u6a4b\u6e21\u3057\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/p>\n<\/div>\n\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;\">CONCLUSION<\/span>\n  <span class=\"section-title\" style=\"display:block;\">\u307e\u3068\u3081\uff1aJava\u306eboolean\/Boolean\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8<\/span>\n  <span class=\"section-desc\">\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u3068\u30e9\u30c3\u30d1\u30fc\u306e\u4f7f\u3044\u5206\u3051\u30fbNPE\u5bfe\u7b56\u306e\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>boolean<\/strong>\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08true\/false\u306e\u307f\uff09\u3001<strong>Boolean<\/strong>\u306f\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff08null\u53ef\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>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5024\u306f<strong>boolean\u306ffalse<\/strong>\u3001<strong>Boolean\u306fnull<\/strong><\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>Boolean\u304cnull\u306e\u307e\u307eunboxing\u3059\u308b\u3068NullPointerException\u3002<strong>Boolean.TRUE.equals()<\/strong>\u304c\u5b89\u5168<\/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>autoboxing<\/strong>\u3067boolean\u21d4Boolean\u306f\u81ea\u52d5\u5909\u63db\u3055\u308c\u308b\u3002\u305f\u3060\u3057unboxing\u6642null\u306fNPE<\/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.parseBoolean(\"true\")<\/strong>\u3067String\u3092boolean\u5909\u63db\u3002null\u2192false\uff08\u4f8b\u5916\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>\u30e1\u30bd\u30c3\u30c9\u623b\u308a\u5024\u306f<strong>null\u4e0d\u8981\u306a\u3089boolean\u3001\u672a\u8a2d\u5b9a\u72b6\u614b\u3092\u8fd4\u3059\u306a\u3089Boolean<\/strong><\/span><\/div>\n<div style=\"display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:15px;line-height:1.6;\"><span style=\"color:#dc2626;font-size:16px;flex-shrink:0;margin-top:2px;\">&#10004;&#65039;<\/span><span>Generics\u3067\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306f\u4f7f\u3048\u306a\u3044\u305f\u3081<strong>List&lt;Boolean&gt;<\/strong>\u3092\u4f7f\u3046<\/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>\u306bNPE\u304c\u8d77\u304d\u308b\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u539f\u56e0\u3068\u4fee\u6b63\u30b3\u30fc\u30c9\u304c\u8fd4\u3063\u3066\u304f\u308b<\/span><\/div>\n\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Java\u306e\u578b\u30b7\u30b9\u30c6\u30e0\u3092\u3088\u308a\u6df1\u304f\u7406\u89e3\u3057\u3066\u958b\u767a\u52b9\u7387\u3092\u4e0a\u3052\u305f\u3044\u65b9\u3078<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">boolean\/Boolean\u306b\u9650\u3089\u305a\u3001Java\u306e\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u3068\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u306fGenerics\u30fbStream\u30fbOptional\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u304d\u306b\u7406\u89e3\u304c\u554f\u308f\u308c\u307e\u3059\u3002Claude Code\u3067\u30b3\u30fc\u30c9\u3092\u751f\u6210\u3057\u306a\u304c\u3089\u5b66\u3076\u3053\u3068\u3067\u3001\u578b\u30b7\u30b9\u30c6\u30e0\u306e\u7406\u89e3\u304c\u52a0\u901f\u3057\u307e\u3059\u3002<br>AI\u9b3c\u7ba1\u7406\u3067\u306f\u3001Java\u958b\u767a\u30fb\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u652f\u63f4\u306b\u3064\u3044\u3066\u306e\u7121\u6599\u76f8\u8ac7\u3092\u53d7\u3051\u4ed8\u3051\u3066\u3044\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\">NullPointerException\u306b\u60a9\u3093\u3067\u3044\u308b\u5834\u5408\u3001Boolean\u306e\u4f7f\u3044\u65b9\u306e\u554f\u984c\u3067\u3042\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u300c\u3053\u306e\u30b3\u30fc\u30c9\u3067NPE\u304c\u51fa\u308b\u539f\u56e0\u3092\u6559\u3048\u3066\u300d\u3068Claude Code\u306b\u805e\u304f\u3060\u3051\u3067\u3001\u539f\u56e0\u3068\u4fee\u6b63\u30b3\u30fc\u30c9\u304c\u51fa\u3066\u304d\u307e\u3059\u3002\u307e\u305a\u304a\u6c17\u8efd\u306b\u3054\u76f8\u8ac7\u304f\u3060\u3055\u3044\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-boolean&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\u306eboolean\u3068boolean\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. boolean\uff08\u5c0f\u6587\u5b57\uff09\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3067true\/false\u306e\u5024\u306e\u307f\u4fdd\u6301\u3057\u307e\u3059\u3002\u521d\u671f\u5024\u306ffalse\u3001null\u306f\u4ee3\u5165\u3067\u304d\u307e\u305b\u3093\u3002Boolean\uff08\u5927\u6587\u5b57\uff09\u306fjava.lang.Boolean\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3067\u3001true\u30fbfalse\u30fbnull\u3092\u4fdd\u6301\u3067\u304d\u307e\u3059\u3002\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5024\u306fnull\u3067\u3059\u3002\u57fa\u672c\u7684\u306b\u306fboolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u3092\u4f7f\u3044\u3001null\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u3084Generics\u3067\u4f7f\u3046\u5834\u5408\u306b\u306e\u307fBoolean\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306eBoolean\u3067NullPointerException\u304c\u767a\u751f\u3059\u308b\u539f\u56e0\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Boolean\u304cnull\u306e\u3068\u304d\u306bJava\u304c\u81ea\u52d5\u7684\u306bunboxing\uff08Boolean\u2192boolean\u5909\u63db\uff09\u3092\u884c\u3046\u3068NullPointerException\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u5178\u578b\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u306fif(booleanObj){...}\u3084boolean b = booleanObj;\u3067booleanObj\u304cnull\u306e\u5834\u5408\u3067\u3059\u3002\u5bfe\u7b56\u306fBoolean.TRUE.equals(booleanObj)\u3092\u4f7f\u3046\uff08null\u3067\u3082\u4f8b\u5916\u304c\u51fa\u306a\u3044\uff09\u304b\u3001if(booleanObj != null && booleanObj){...}\u3068null\u30c1\u30a7\u30c3\u30af\u3092\u5148\u884c\u3055\u305b\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u3067String\u3092boolean\u306b\u5909\u63db\u3059\u308b\u306b\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Boolean.parseBoolean(\u6587\u5b57\u5217)\u3092\u4f7f\u3044\u307e\u3059\u3002\"true\"\uff08\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u4e0d\u554f\uff09\u306e\u307ftrue\u3092\u8fd4\u3057\u3001\u305d\u308c\u4ee5\u5916\uff08\"false\"\u30fb\"1\"\u30fb\"yes\"\u30fbnull\u7b49\uff09\u306ffalse\u3092\u8fd4\u3057\u307e\u3059\u3002null\u3092\u6e21\u3057\u3066\u3082\u4f8b\u5916\u306f\u51fa\u307e\u305b\u3093\u3002\u9006\u306bboolean\u3092String\u306b\u5909\u63db\u3059\u308b\u5834\u5408\u306fBoolean.toString(bool)\u307e\u305f\u306fString.valueOf(bool)\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u3067List<boolean>\u3092\u4f7f\u3048\u306a\u3044\u306e\u306f\u306a\u305c\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Java\u306eGenerics\uff08\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u307f\u53d7\u3051\u4ed8\u3051\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08boolean\u30fbint\u30fbdouble\u7b49\uff09\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002\u3053\u308c\u306fJava\u306eGenerics\u304c\u5185\u90e8\u7684\u306b\u578b\u6d88\u53bb\u3092\u4f7f\u3063\u3066\u304a\u308a\u3001\u3059\u3079\u3066Object\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3067\u3059\u3002List<boolean>\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b\u305f\u3081\u3001List<Boolean>\u3092\u4f7f\u3044\u307e\u3059\u3002add\u3059\u308b\u3068\u304d\u306fautoboxing\u3067\u81ea\u52d5\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306eBoolean\u306f\u3069\u3093\u306a\u6642\u306b\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. Boolean\u306fGenerics\u3092\u4f7f\u3046\u5834\u5408\uff08List<Boolean>\u30fbMap<String,Boolean>\u7b49\uff09\u3068\u3001\u300c\u672a\u8a2d\u5b9a\u72b6\u614b\uff08null\uff09\u300d\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002Map\u304b\u3089\u53d6\u5f97\u3057\u305f\u8a2d\u5b9a\u5024\u304c\u300c\u307e\u3060\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\uff08null\uff09\u300d\u300c\u660e\u793a\u7684\u306bfalse\u300d\u300c\u660e\u793a\u7684\u306btrue\u300d\u306e3\u72b6\u614b\u3092\u533a\u5225\u3057\u305f\u3044\u5834\u5408\u306a\u3069\u3067\u3059\u3002\u305d\u308c\u4ee5\u5916\u306fboolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u3092\u4f7f\u3046\u306e\u304c\u57fa\u672c\u3067\u3059\u3002null\u3092\u4f7f\u3046\u5834\u5408\u306fBoolean.TRUE.equals()\u3067null\u5b89\u5168\u306a\u6bd4\u8f03\u3092\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Q. Java\u306ebooleantoBoolean\u306eautoboxing\u3067\u6ce8\u610f\u3059\u308b\u3053\u3068\u306f\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A. autoboxing\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u7684\u306bBoolean.valueOf()\u3092\u633f\u5165\u3057\u3066\u304f\u308c\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001unboxing\u6642\u306bBoolean\u304cnull\u3060\u3068NullPointerException\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u307e\u305fBoolean b1 = new Boolean(true); Boolean b2 = new Boolean(true);\u306e\u5834\u5408b1==b2\u306ffalse\uff08\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u306b\u306a\u308a\u307e\u3059\u3002Boolean\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fBoolean.valueOf()\u3067\u53d6\u5f97\u3059\u308b\u3068\u540c\u4e00\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08Boolean.TRUE\/Boolean.FALSE\uff09\u304c\u518d\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": 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\"boolean\uff08\u5c0f\u6587\u5b57\uff09\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3067true\/false\u306e\u5024\u306e\u307f\u4fdd\u6301\u3057\u307e\u3059\u3002\u521d\u671f\u5024\u306ffalse\u3001null\u306f\u4ee3\u5165\u3067\u304d\u307e\u305b\u3093\u3002Boolean\uff08\u5927\u6587\u5b57\uff09\u306fjava.lang.Boolean\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3067\u3001true\u30fbfalse\u30fbnull\u3092\u4fdd\u6301\u3067\u304d\u307e\u3059\u3002\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5024\u306fnull\u3067\u3059\u3002\u57fa\u672c\u7684\u306b\u306fboolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u3092\u4f7f\u3044\u3001null\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u3084Generics\u3067\u4f7f\u3046\u5834\u5408\u306b\u306e\u307fBoolean\u3092\u4f7f\u3044\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306eBoolean\u3067NullPointerException\u304c\u767a\u751f\u3059\u308b\u539f\u56e0\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Boolean\u304cnull\u306e\u3068\u304d\u306bJava\u304c\u81ea\u52d5\u7684\u306bunboxing\uff08Boolean\u2192boolean\u5909\u63db\uff09\u3092\u884c\u3046\u3068NullPointerException\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u5178\u578b\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u306fif(booleanObj){...}\u3084boolean b = booleanObj;\u3067booleanObj\u304cnull\u306e\u5834\u5408\u3067\u3059\u3002\u5bfe\u7b56\u306fBoolean.TRUE.equals(booleanObj)\u3092\u4f7f\u3046\uff08null\u3067\u3082\u4f8b\u5916\u304c\u51fa\u306a\u3044\uff09\u304b\u3001if(booleanObj != null && booleanObj){...}\u3068null\u30c1\u30a7\u30c3\u30af\u3092\u5148\u884c\u3055\u305b\u308b\u3053\u3068\u3067\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u3067String\u3092boolean\u306b\u5909\u63db\u3059\u308b\u306b\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Boolean.parseBoolean(\u6587\u5b57\u5217)\u3092\u4f7f\u3044\u307e\u3059\u3002\\\"true\\\"\uff08\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u4e0d\u554f\uff09\u306e\u307ftrue\u3092\u8fd4\u3057\u3001\u305d\u308c\u4ee5\u5916\uff08\\\"false\\\"\u30fb\\\"1\\\"\u30fb\\\"yes\\\"\u30fbnull\u7b49\uff09\u306ffalse\u3092\u8fd4\u3057\u307e\u3059\u3002null\u3092\u6e21\u3057\u3066\u3082\u4f8b\u5916\u306f\u51fa\u307e\u305b\u3093\u3002\u9006\u306bboolean\u3092String\u306b\u5909\u63db\u3059\u308b\u5834\u5408\u306fBoolean.toString(bool)\u307e\u305f\u306fString.valueOf(bool)\u3092\u4f7f\u3044\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u3067List<boolean>\u3092\u4f7f\u3048\u306a\u3044\u306e\u306f\u306a\u305c\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Java\u306eGenerics\uff08\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\uff09\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u307f\u53d7\u3051\u4ed8\u3051\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff08boolean\u30fbint\u30fbdouble\u7b49\uff09\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002\u3053\u308c\u306fJava\u306eGenerics\u304c\u5185\u90e8\u7684\u306b\u578b\u6d88\u53bb\u3092\u4f7f\u3063\u3066\u304a\u308a\u3001\u3059\u3079\u3066Object\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3067\u3059\u3002List<boolean>\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b\u305f\u3081\u3001List<Boolean>\u3092\u4f7f\u3044\u307e\u3059\u3002add\u3059\u308b\u3068\u304d\u306fautoboxing\u3067\u81ea\u52d5\u5909\u63db\u3055\u308c\u307e\u3059\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306eBoolean\u306f\u3069\u3093\u306a\u6642\u306b\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Boolean\u306fGenerics\u3092\u4f7f\u3046\u5834\u5408\uff08List<Boolean>\u30fbMap<String,Boolean>\u7b49\uff09\u3068\u3001\u300c\u672a\u8a2d\u5b9a\u72b6\u614b\uff08null\uff09\u300d\u3092\u8868\u73fe\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002Map\u304b\u3089\u53d6\u5f97\u3057\u305f\u8a2d\u5b9a\u5024\u304c\u300c\u307e\u3060\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\uff08null\uff09\u300d\u300c\u660e\u793a\u7684\u306bfalse\u300d\u300c\u660e\u793a\u7684\u306btrue\u300d\u306e3\u72b6\u614b\u3092\u533a\u5225\u3057\u305f\u3044\u5834\u5408\u306a\u3069\u3067\u3059\u3002\u305d\u308c\u4ee5\u5916\u306fboolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u3092\u4f7f\u3046\u306e\u304c\u57fa\u672c\u3067\u3059\u3002null\u3092\u4f7f\u3046\u5834\u5408\u306fBoolean.TRUE.equals()\u3067null\u5b89\u5168\u306a\u6bd4\u8f03\u3092\u3057\u3066\u304f\u3060\u3055\u3044\u3002\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Java\u306ebooleantoBoolean\u306eautoboxing\u3067\u6ce8\u610f\u3059\u308b\u3053\u3068\u306f\uff1f\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"autoboxing\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u7684\u306bBoolean.valueOf()\u3092\u633f\u5165\u3057\u3066\u304f\u308c\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001unboxing\u6642\u306bBoolean\u304cnull\u3060\u3068NullPointerException\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u307e\u305fBoolean b1 = new Boolean(true); Boolean b2 = new Boolean(true);\u306e\u5834\u5408b1==b2\u306ffalse\uff08\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff09\u306b\u306a\u308a\u307e\u3059\u3002Boolean\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fBoolean.valueOf()\u3067\u53d6\u5f97\u3059\u308b\u3068\u540c\u4e00\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08Boolean.TRUE\/Boolean.FALSE\uff09\u304c\u518d\u5229\u7528\u3055\u308c\u307e\u3059\u3002\"\n      }\n    }\n  ]\n}\n<\/script>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Java\u306eboolean\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\uff09\u3068Boolean\uff08\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\uff09\u3092\u5b8c\u5168\u89e3\u8aac\u3002\u521d\u671f\u5024\u306e\u9055\u3044\uff08false vs null\uff09\u3001NullPointerException\u304c\u8d77\u304d\u308b\u7406\u7531\u3068\u5bfe\u7b56\u3001autoboxing\u306e\u4ed5\u7d44\u307f\u3001Boolean.parseBoolean\u30fbcompareTo\u30fbtoString\u6d3b\u7528\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u30d1\u30bf\u30fc\u30f3\u3001Claude 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