{"id":876,"date":"2018-11-05T12:00:00","date_gmt":"2018-11-05T03:00:00","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=876"},"modified":"2025-09-17T13:40:46","modified_gmt":"2025-09-17T04:40:46","slug":"java-static-field","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/java-static-field","title":{"rendered":"Java\u306estatic\u3068\u306f\uff1f\u521d\u5fc3\u8005\u5411\u3051\u306bstatic\u306e\u4ed5\u7d44\u307f\u3084\u4f7f\u3044\u65b9\u3092\u89e3\u8aac"},"content":{"rendered":"<p>Java\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306b<span>static<\/span>\u3068\u6307\u5b9a\u3059\u308b\u3068\u3001\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3067\u3042\u308b<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9<span>(static<\/span>\u5909\u6570\u3001\u30af\u30e9\u30b9\u5909\u6570\u3068\u3082<span>)<\/span>\u3068\u306a\u308a\u307e\u3059\u3002\u3054\u5b58\u3058\u306e\u3068\u304a\u308a\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u306f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3067\u306f\u306a\u3044\u5909\u6570\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u3064\u3044\u3066\u3001\u5ba3\u8a00\u306e\u4ed5\u65b9\u3001\u4f7f\u3044\u65b9\u3001\u6d3b\u7528\u4f8b\u306a\u3069\u306b\u3064\u3044\u3066\u521d\u5fc3\u8005\u5411\u3051\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>\u203b\u3053\u306e\u8a18\u4e8b\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001<span>Java 10<\/span>\u306e\u74b0\u5883\u306b\u3066\u52d5\u4f5c\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Javastatic\">\uff11\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u306f\u30af\u30e9\u30b9\u304c\u6301\u3064\u30d5\u30a3\u30fc\u30eb\u30c9<\/a><ul><li><a href=\"#-static\">\uff11-\uff11\uff0e\u826f\u304f\u3042\u308b\u52d8\u9055\u3044\uff1astatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5fc5\u305a\u3057\u3082\u5b9a\u6570\u3067\u306f\u306a\u3044<\/a><\/li><\/ul><\/li><li><a href=\"#static\">\uff12\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/a><\/li><li><a href=\"#Javastatic-2\">\uff13\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f7f\u3044\u65b9<\/a><\/li><li><a href=\"#Javastatic-3\">\uff14\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5316\u306e\u4ed5\u65b9<\/a><ul><li><a href=\"#i\">\uff14-\uff11\uff0e\u5ba3\u8a00\u6642\u306b\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/a><\/li><li><a href=\"#-static-2\">\uff14-\uff12\uff0estatic\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3067\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/a><\/li><\/ul><\/li><li><a href=\"#static-2\">\uff15\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6d3b\u7528\u4f8b<\/a><ul><li><a href=\"#i-2\">\uff15-\uff11\uff0e\u5b9a\u6570\u3068\u3057\u3066\u4f7f\u3046<\/a><\/li><li><a href=\"#i-3\">\uff15-\uff12\uff0e\u30ed\u30c3\u30af(\u6392\u4ed6\u5236\u5fa1)\u7528\u306e\u5909\u6570\u3068\u3057\u3066\u4f7f\u3046<\/a><\/li><li><a href=\"#-1Singleton\">\uff15-\uff13\uff0e1\u3064\u3060\u3051\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u8a3c\u3059\u308b(Singleton\u30d1\u30bf\u30fc\u30f3)<\/a><\/li><li><a href=\"#i-4\">\uff15-\uff14\uff0e\u56fa\u5b9a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4f7f\u3046<\/a><\/li><\/ul><\/li><li><a href=\"#static-3\">\uff16\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u60aa\u7528\u4f8b<\/a><\/li><li><a href=\"#i-5\">\uff17\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Javastatic\">\uff11\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u306f\u30af\u30e9\u30b9\u304c\u6301\u3064\u30d5\u30a3\u30fc\u30eb\u30c9<\/span><\/h2>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u7279\u5fb4\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3068\u4f7f\u3048\u306a\u3044\u3001\u4f55\u304b\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u7d10\u4ed8\u3044\u3066\u3044\u308b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u7570\u306a\u308b\u5909\u6570<\/strong><\/li>\n<li><strong>static\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u304f\u3066\u3082\u4f7f\u3048\u308b\u3001\u30af\u30e9\u30b9\u306b\u7d10\u4ed8\u3044\u3066\u3044\u308b\u3001\u30af\u30e9\u30b9\u3067\u4e00\u3064\u306e\u5909\u6570<\/strong><\/li>\n<\/ul>\n<p>\u3064\u307e\u308a\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u304c<span>static<\/span>\u304b\u3069\u3046\u304b\u306e\u9055\u3044\u3068\u306f\u3001\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u7d10\u4ed8\u3044\u3066\u3044\u308b\u5148\u304c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u30af\u30e9\u30b9\u306e\u3069\u3061\u3089\u3067\u3042\u308b\u304b\u3067\u3059\u3002\u305d\u3057\u3066\u3001<span>Java<\/span>\u3067\u306f\u30af\u30e9\u30b9\u306f\u30e1\u30e2\u30ea\u4e0a\u306b\u4e00\u3064\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u3067\u4e00\u3064\u3057\u304b\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-static\">\uff11-\uff11\uff0e\u826f\u304f\u3042\u308b\u52d8\u9055\u3044\uff1a<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5fc5\u305a\u3057\u3082\u5b9a\u6570\u3067\u306f\u306a\u3044<\/span><\/h3>\n<p>static\u306f\u300c\u9759\u7684\u306a\u3001\u56fa\u5b9a\u306e\u300d\u3092\u610f\u5473\u3059\u308b\u82f1\u5358\u8a9e\u306a\u306e\u3067\u3001\u300c<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u4e00\u56de\u8a2d\u5b9a\u3057\u305f\u5024\u3092\u5909\u3048\u3089\u308c\u306a\u3044<span>(=<\/span>\u5b9a\u6570\u306e\u5f79\u5272<span>)<\/span>\u300d\u3068\u601d\u308f\u308c\u308b\u65b9\u304c\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3067\u3059\u304c\u3001<span>Java<\/span>\u3067\u306f\u5909\u6570\u306e\u5185\u5bb9\u3092\u4e0d\u5909\u3068\u3059\u308b\u4fee\u98fe\u5b50\u306f<span>final<\/span>\u3068\u3044\u3046\u5225\u306e\u3082\u306e\u306a\u306e\u3067\u3001\u9593\u9055\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u9759\u7684\u30fb\u56fa\u5b9a\u3067\u3042\u308b\u3068\u306f\u3001<span>Java<\/span>\u306e\u30e1\u30e2\u30ea\u4e0a\u306b\u5c02\u7528\u306e\u9818\u57df\u3092\u9759\u7684\u30fb\u56fa\u5b9a\u3067\u78ba\u4fdd\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u3067\u3059\u304b\u3089\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u4e00\u822c\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u8a00\u3046\u3068\u3053\u308d\u306e\u5e83\u57df\u5909\u6570\u3067\u3042\u308a\u3001\u5b9a\u6570<span>(<\/span>\u6c7a\u3081\u305f\u5024\u306f\u672a\u6765\u6c38\u52ab\u5909\u3048\u306a\u3044\u3001\u5909\u308f\u3089\u306a\u3044<span>)<\/span>\u3067\u306f\u5fc5\u305a\u3057\u3082\u306a\u3044\u306e\u3067\u3059\u3002\u3053\u306e\u7406\u89e3\u306f\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>static\u304b\u3064<span>final<\/span>\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3042\u308c\u3070\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u3067\u3044\u308f\u3086\u308b\u5b9a\u6570\u306e\u3088\u3046\u306b\u7528\u3044\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u666e\u901a\u306b\u4f7f\u3044\u307e\u3059\u304c\u3001<span>final<\/span>\u3067\u306a\u3044<span>static<\/span>\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u3080\u3084\u307f\u3084\u305f\u3089\u306b\u4f7f\u3046\u3068\u3001\u904e\u53bb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u5927\u554f\u984c\u3068\u306a\u3063\u305f\u5e83\u57df\u5909\u6570\u306e\u554f\u984c\u304c<span>Java<\/span>\u3067\u3082\u518d\u767a\u3059\u308b\u306e\u3067\u3001\u5927\u5909\u5371\u967a\u3067\u3059<span>(<\/span>\u8a73\u7d30\u306f\u5f8c\u8ff0\u3057\u307e\u3059<span>)<\/span>\u3002<\/p>\n<h2><span id=\"static\">\uff12\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/span><\/h2>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3059\u308b\u306b\u306f\u3001\u5909\u6570\u5ba3\u8a00\u306b\u304a\u3044\u3066\u578b\u306e\u300c\u524d\u300d\u306b\u4fee\u98fe\u5b50<span> static <\/span>\u3092\u4ed8\u3051\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample1 {\r\n\tint instanceField = 1; \u2190 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\tstatic int staticField = 2; \/\/ \u2190 static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\t\/* int static staticField2 = 3; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! static\u3092\u4ed8\u3051\u308b\u5834\u6240\u304c\u9055\u3046\u305f\u3081 *\/\r\n}<\/pre>\n<p>\u5909\u6570\u540d\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30fb<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u9593\u3067\u3082\u91cd\u8907\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u306e\u3067\u3001\u4ee5\u4e0b\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample2 {\r\n\tint someField = 1;\r\n\tstatic int someField = 2; \/\/ \u2190 \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! 1\u3064\u306e\u30af\u30e9\u30b9\u5185\u3067\u5909\u6570\u540d\u304c\u91cd\u8907\u3057\u3066\u3044\u308b\u305f\u3081\r\n}<\/pre>\n<p>\u307e\u305f\u3001\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092<span>static<\/span>\u306b\u306f\u3067\u304d\u307e\u305b\u3093\u306e\u3067\u3001\u4ee5\u4e0b\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample3 {\r\n\tvoid method() {\r\n\t\tstatic int x = 1; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! \u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306fstatic\u3068\u306f\u3067\u304d\u306a\u3044\r\n\t}\r\n}<\/pre>\n<h2><span id=\"Javastatic-2\">\uff13\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f7f\u3044\u65b9<\/span><\/h2>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u4f55\u306e\u6301\u3061\u7269\u304b\u304c\u9055\u3046\u306e\u3067\u3001\u4f7f\u3044\u65b9\u3082\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u9055\u3044\u307e\u3059\u3002\u306a\u304a\u3001\u540c\u3058\u30af\u30e9\u30b9\u306e\u4e2d\u3042\u308b\u3044\u306f<span>static import<\/span>\u3092\u884c\u3048\u3070\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u3046\u969b\u306e<span>&#8220;<\/span>\u30af\u30e9\u30b9\u540d<span>.&#8221;<\/span>\u306f\u8a18\u8ff0\u3092\u7701\u7565\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6307\u3059\u5909\u6570\u540d<span>.<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u540d<\/li>\n<li>static\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a\u30af\u30e9\u30b9\u540d<span>.static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u540d<\/li>\n<\/ul>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5c5e\u3059\u308b\u5148\u304c\u9055\u3046\u3060\u3051\u306a\u306e\u3067\u3001\u4f7f\u3044\u65b9\u305d\u306e\u3082\u306e\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample4 {\r\n\tint instanceField = 1; \/\/ \u2190 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\tstatic int staticField = 2; \/\/ \u2190 static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\r\n\tvoid method() {\r\n\t\tSystem.out.println(staticField); \/\/ \u2192 2\u3001\u540c\u3058\u30af\u30e9\u30b9\u306e\u4e2d\u304b\u3089\u306a\u306e\u3067static\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u76f4\u63a5\u53c2\u7167\u3067\u304d\u308b\r\n\t}\r\n}\r\n\r\nclass StaticFieldSample5 {\r\n\tpublic static void main(String[] args) {\r\n\t\tStaticFieldSample4 sample1 = new StaticFieldSample4(); \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3001sample1\u3068\u3044\u3046\u5909\u6570\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u53c2\u7167\u3092\u78ba\u4fdd\r\n\t\tSystem.out.println(sample1.instanceField); \/\/ \u2192 1\r\n\r\n\t\tStaticFieldSample4 sample2 = new StaticFieldSample4(); \/\/ \u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3001sample2\u3068\u3044\u3046\u5909\u6570\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u53c2\u7167\u3092\u78ba\u4fdd\r\n\t\tsample2.instanceField = 100; \/\/ sample2\u304c\u6307\u3059\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u5909\u66f4\r\n\t\tSystem.out.println(sample1.instanceField); \/\/ \u2192 1\u3001sample1\u304c\u6307\u3059\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5909\u308f\u3089\u305a1\u306e\u307e\u307e\r\n\t\tSystem.out.println(sample2.instanceField); \/\/ \u2192 100\r\n\r\n\t\tSystem.out.println(StaticFieldSample4.instanceField); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3068\u4f7f\u3048\u306a\u3044\r\n\t\tSystem.out.println(StaticFieldSample4.staticField); \/\/ \u2192 2\u3001static\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30af\u30e9\u30b9\u7d4c\u7531\u3067\u76f4\u63a5\u53c2\u7167\u3067\u304d\u308b\r\n\t}\r\n}<\/pre>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30af\u30e9\u30b9\u3067\u4e00\u3064\u3060\u3051\u3001\u3068\u3044\u3046\u306e\u306f\u4ee5\u4e0b\u3067\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u3069\u3053\u304b\u3067<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u3068\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u3067\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u7b87\u6240\u5168\u3066\u3067\u5909\u66f4\u7d50\u679c\u304c\u53cd\u6620\u3055\u308c\u308b\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample6 {\r\n\tstatic Object staticField = new Object();\r\n\r\n\tvoid printStaticField() {\r\n\t\tSystem.out.println(staticField); \/\/ static\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u3059\u3082\u306e\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u3089\u78ba\u8a8d\r\n\t}\r\n}\r\n\r\nclass StaticFieldSample7 {\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ StaticFieldSample6\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30922\u3064\u4f5c\u6210\r\n\t\tStaticFieldSample6 sample1 = new StaticFieldSample6();\r\n\t\tStaticFieldSample6 sample2 = new StaticFieldSample6();\r\n\r\n\t\t\/\/ static\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u3059\u3082\u306e\u3092\u78ba\u8a8d\r\n\t\tsample1.printStaticField(); \/\/ \u2192 java.lang.Object@6b1d6fff\r\n\t\tsample2.printStaticField(); \/\/ \u2192 java.lang.Object@6b1d6fff\r\n\t\tSystem.out.println(StaticFieldSample6.staticField); \/\/ \u2192 java.lang.Object@6b1d6fff\r\n\r\n\t\t\/\/ static\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u3059\u3082\u306e\u3092\u5909\u66f4\r\n\t\tStaticFieldSample6.staticField = new Object();\r\n\r\n\t\t\/\/ static\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6307\u3059\u3082\u306e\u3092\u518d\u78ba\u8a8d\r\n\t\tsample1.printStaticField(); \/\/ \u2192 java.lang.Object@299a06ac\r\n\t\tsample2.printStaticField(); \/\/ \u2192 java.lang.Object@299a06ac\r\n\t\tSystem.out.println(StaticFieldSample6.staticField); \/\/ \u2192 java.lang.Object@299a06ac\r\n\t}\r\n}<\/pre>\n<p>\u306a\u304a\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7d4c\u7531\u3067\u53c2\u7167\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3060\u3068\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u3067\u5206\u304b\u308a\u3065\u3089\u304f\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u901a\u5e38\u306f\u30af\u30e9\u30b9\u540d\u304b\u3089\u53c2\u7167\u3057\u307e\u3059\u3002\u958b\u767a\u74b0\u5883\u306b\u3088\u3063\u3066\u306f\u8b66\u544a\u304c\u51fa\u308b\u3053\u3068\u3059\u3089\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample8 {\r\n\tstatic int staticField = 1;\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(StaticFieldSample8.staticField); \/\/ \u2192 1\r\n\r\n\t\tStaticFieldSample8 sample = new StaticFieldSample8();\r\n\t\tSystem.out.println(sample.staticField); \/\/ \u2192 1\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7d4c\u7531\u3067\u3082\u30a2\u30af\u30bb\u30b9\u306f\u3067\u304d\u308b\u304c\u3001\u666e\u901a\u306f\u3053\u3046\u66f8\u304b\u306a\u3044\r\n\t}\r\n}<\/pre>\n<h2><span id=\"Javastatic-3\">\uff14\uff0e\u3010Java\u3011static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5316\u306e\u4ed5\u65b9<\/span><\/h2>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5316\u306e\u4ed5\u65b9\u306f\u4ee5\u4e0b\u306e<span>2<\/span>\u3064\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u5ba3\u8a00\u6642\u306b\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<li><span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3067\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<\/ul>\n<p>\u306a\u304a\u3001\u672a\u521d\u671f\u5316\u3068\u3057\u305f\u5834\u5408\u306e\u521d\u671f\u5024\u306e\u30eb\u30fc\u30eb\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u540c\u3058\u3067\u3001\u6570\u5024\u578b\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u306e\u5834\u5408\u306f<span>0<\/span>\u3001<span>boolean<\/span>\u306e\u5834\u5408\u306f<span>false<\/span>\u3001\u53c2\u7167\u578b\u306e\u5834\u5408\u306f<span>null<\/span>\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample9 {\r\n\tstatic int staticIntField;\r\n\tstatic boolean staticBooleanField;\r\n\tstatic Object staticObjectField;\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(staticIntField); \/\/ \u2192 0\r\n\t\tSystem.out.println(staticBooleanField); \/\/ \u2192 false\r\n\t\tSystem.out.println(staticObjectField); \/\/ \u2192 null\r\n\t}\r\n}<\/pre>\n<h3><span id=\"i\">\uff14-\uff11\uff0e\u5ba3\u8a00\u6642\u306b\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/span><\/h3>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3084\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3068\u540c\u69d8\u306b\u3001\u5ba3\u8a00\u6642\u306b\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u30af\u30e9\u30b9\u306b\u4e00\u3064\u3067\u3059\u304b\u3089\u3001\u521d\u671f\u5024\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u306e\u306f\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u3068\u540c\u30bf\u30a4\u30df\u30f3\u30b0\u3001\u304b\u3064\u30d7\u30ed\u30b0\u30e9\u30e0\u5b9f\u884c\u4e2d\u306b<span>1<\/span>\u56de\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample10 {\r\n\tstatic int staticIntField = 100;\r\n\tstatic boolean staticBooleanField = true;\r\n\tstatic Object staticObjectField = new Object();\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(staticIntField); \/\/ \u2192 100\r\n\t\tSystem.out.println(staticBooleanField); \/\/ \u2192 true\r\n\t\tSystem.out.println(staticObjectField); \/\/ \u2192 Object\u3078\u306e\u53c2\u7167\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-static-2\">\uff14-\uff12\uff0estatic\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3067\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/span><\/h3>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u521d\u671f\u5316\u306a\u3069\u3092\u884c\u3048\u307e\u3059\u304c\u3001\u30af\u30e9\u30b9\u305d\u306e\u3082\u306e\u306b\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4ee3\u308f\u308a\u306b\u3001<span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3068\u3044\u3046\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u306b\u4f7f\u3048\u308b\u69cb\u6587\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u305d\u3053\u3067\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u306f\u30d6\u30ed\u30c3\u30af\u306a\u306e\u3067\u3001\u9577\u3044\u51e6\u7406\u3082\u66f8\u3051\u307e\u3059\u3002\u4e00\u65b9\u3001\u5ba3\u8a00\u3068\u540c\u6642\u306e\u521d\u671f\u5316\u3067\u306f\u3001\u4e00\u3064\u306e\u6587\u3067\u66f8\u3051\u308b\u5185\u5bb9\u3067\u3057\u304b\u521d\u671f\u5316\u3067\u304d\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3068\u306f\u3001\u30af\u30e9\u30b9\u306e\u4e2d\u306b\u4ee5\u4e0b\u306e\u66f8\u5f0f\u3067\u4f5c\u6210\u3057\u305f\u30d6\u30ed\u30c3\u30af\u306e\u3053\u3068\u3067\u3059\u3002<span>&#8220;static&#8221;<\/span>\u306e\u5f8c\u308d\u306b\u30d6\u30ed\u30c3\u30af\u3092\u7f6e\u304d\u3001\u30d6\u30ed\u30c3\u30af\u4e2d\u306b\u5fc5\u8981\u306a\u51e6\u7406\u3092\u66f8\u304d\u307e\u3059\u3002<span>final<\/span>\u306a<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3001\u5ba3\u8a00\u6642\u306b\u5024\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001<span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u5185\u3067\u521d\u671f\u5316\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">static {\r\n\t\/\/ \u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u6642\u306b\u5b9f\u884c\u3057\u305f\u3044\u51e6\u7406\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample11 {\r\n\tstatic List&lt;String&gt; staticListField; \/\/ List\u306estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5ba3\u8a00\r\n\tstatic final String staticStringField; \/\/ final\u306astatic\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5ba3\u8a00\u3057\u305f\u304c\u3001\u5024\u306f\u672a\u8a2d\u5b9a\r\n\r\n\tstatic {\r\n\t\t\/\/ List\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3066add\u3059\u308b\u306b\u306f\u8907\u6570\u884c\u304c\u5fc5\u8981\u306a\u306e\u3067\u3001static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u5185\u3067\u521d\u671f\u5316\u3059\u308b\r\n\t\tstaticListField = new ArrayList&lt;&gt;();\r\n\t\tstaticListField.add(\"value1\");\r\n\t\tstaticListField.add(\"value2\");\r\n\t\tstaticListField.add(\"value3\");\r\n\r\n\t\tstaticStringField = \"String\"; \/\/ static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u5185\u3067\u521d\u671f\u5316\u3092\u884c\u308f\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!!\r\n\t}\r\n}<\/pre>\n<p>static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u3067\u306f\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3092<span>throw<\/span>\u3067\u304d\u307e\u305b\u3093\u3002\u3057\u304b\u3082\u3001<span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u5185\u3067\u767a\u751f\u3057\u305f\u4f8b\u5916\u304c<span>catch<\/span>\u305b\u305a\u306b<span>throw<\/span>\u3055\u308c\u308b\u306a\u3089\u3001\u305d\u306e\u30af\u30e9\u30b9\u306f\u6c38\u4e45\u306b\u521d\u671f\u5316\u304c\u5b8c\u4e86\u3067\u304d\u305a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u304b\u3089\u4f7f\u3048\u307e\u305b\u3093\u3002\u9069\u5207\u306b<span>catch<\/span>\u3059\u308b\u306a\u3069\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample12 {\r\n\tstatic {\r\n\t\tthrow new Exception(); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u5185\u3067\u306f\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u3092throw\u3067\u304d\u306a\u3044\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample13 {\r\n\tstatic {\r\n\t\t\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306f\u306a\u3089\u306a\u3044\u304c\u3001\r\n\t\t\/\/ \u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u4e2d\u306bRuntimeException\u304c\u5fc5\u305athrow\u3055\u308c\u308b\u306e\u3067\u3001\r\n\t\t\/\/ \u6c38\u4e45\u306b\u30af\u30e9\u30b9\u3092\u4f7f\u3048\u306a\u3044!!\r\n\t\tif (true) {\r\n\t\t\tthrow new RuntimeException();\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<p>\u3061\u306a\u307f\u306b\u3001\u6d3b\u7528\u3067\u304d\u308b\u5c40\u9762\u306f\u5c11\u306a\u3044\u306e\u3067\u3059\u304c\u3001<span>static<\/span>\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u306f\u4e00\u3064\u306e\u30af\u30e9\u30b9\u4e2d\u306b\u8907\u6570\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002\u8907\u6570\u8a18\u8ff0\u3057\u305f\u5834\u5408\u306f\u3001\u8a18\u8ff0\u3057\u305f\u9806\u756a\u3067<span>(<\/span>\u4e0a\u304b\u3089<span>)<\/span>\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample14 {\r\n\t\/\/ static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u306f\u2460 \u2192 \u2461 \u2192 \u2462\u306e\u9806\u756a\u3067\u5b9f\u884c\u3055\u308c\u308b\r\n\tstatic {\r\n\t\t\/\/ static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u2460\r\n\t\tSystem.out.println(1);\r\n\t}\r\n\tstatic {\r\n\t\t\/\/ static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u2461\r\n\t\tSystem.out.println(2);\r\n\t}\r\n\tstatic {\r\n\t\t\/\/ static\u30a4\u30cb\u30b7\u30e3\u30e9\u30a4\u30b6\u2462\r\n\t\tSystem.out.println(3);\r\n\t}\r\n}<\/pre>\n<h2><span id=\"static-2\">\uff15\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6d3b\u7528\u4f8b<\/span><\/h2>\n<h3><span id=\"i-2\">\uff15-\uff11\uff0e\u5b9a\u6570\u3068\u3057\u3066\u4f7f\u3046<\/span><\/h3>\n<p>\u6700\u3082\u4e00\u822c\u7684\u306a<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f7f\u3044\u65b9\u3067\u3059\u3002<span>Java<\/span>\u3067\u306f\u5b9a\u6570\u306f<span>final<\/span>\u4fee\u98fe\u5b50\u3067\u5b9f\u73fe\u3057\u307e\u3059\u304c\u3001\u5358\u306b<span>final<\/span>\u306a\u3060\u3051\u3060\u3068\u7279\u5b9a\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3057\u304b\u4f7f\u3048\u306a\u3044\u5b9a\u6570\u306b\u306a\u308a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u306a\u3044\u3068\u4f7f\u3048\u306a\u3044\u306a\u3069\u4f7f\u3044\u52dd\u624b\u304c\u60aa\u3044\u306e\u3067\u3001\u4e00\u822c\u7684\u306b\u306f<span>static<\/span>\u3068\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample15 {\r\n\tpublic static final double PI = 3.14; \/\/ \u5186\u5468\u7387\r\n}\r\n\r\nclass StaticFieldSample16 {\r\n\tdouble caluarteCircleArea(double radius) {\r\n\t\treturn radius * radius * StaticFieldSample15.PI; \/\/ \u9762\u7a4d = \u534a\u5f84 x \u534a\u5f84 x \u5186\u5468\u7387(\u5b9a\u6570)\r\n\t}\r\n}<\/pre>\n<p>static\u304b\u3064<span>final<\/span>\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5b9a\u6570\u3068\u3057\u3066\u4f7f\u3046\u3053\u3068\u306f\u5b9f\u52d9\u3067\u3082\u4e00\u822c\u7684\u306b\u884c\u3044\u307e\u3059\u3002\u3067\u3059\u304c\u3001\u304a\u4e92\u3044\u306b\u95a2\u4fc2\u306e\u306a\u3044\u5b9a\u6570\u304c\u305a\u3089\u308a\u3068\u4e26\u3093\u3060\u3001\u3044\u308f\u3086\u308b\u5b9a\u6570\u30af\u30e9\u30b9\u3084\u5b9a\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306f\u300c<span>Java<\/span>\u3089\u3057\u3044\u300d\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30af\u30e9\u30b9\u306e\u5b58\u5728\u610f\u7fa9\u3067\u3042\u308b\u5206\u5272\u7d71\u6cbb\u3084\u9069\u5207\u306a\u5f79\u5272\u5206\u62c5\u306b\u771f\u3063\u5411\u304b\u3089\u53cd\u3059\u308b\u4f7f\u3044\u65b9\u3060\u304b\u3089\u3067\u3059\u3002\u3042\u304f\u307e\u3067\u5fc5\u8981\u60aa\u3067\u3059\u3002\u305d\u308c\u306b\u3001\u5b9a\u6570\u3092\u4f7f\u3046\u306e\u3067\u3042\u308c\u3070\u3001\u4eca\u306a\u3089enum\u3082\u7a4d\u6975\u7684\u306b\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u4f7f\u3046\u5b9a\u6570\u3092\u4e00\u3064\u306e\u30af\u30e9\u30b9\/\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u7ba1\u7406\u3059\u308b\u306e\u306f\u3001\u4eca\u3067\u306f\u30d0\u30c3\u30c9\u30ce\u30a6\u30cf\u30a6\r\npublic class Constant {\r\n\tpublic static final int SUCCESS = 1;\r\n\tpublic static final int FAIL = 2;\r\n\tpublic static final String JDBC_URL = \"jdbc:...\";\r\n\tpublic static final String JDBC_PASSWORD = \"abcdefg\";\r\n\t\u2026\r\n}<\/pre>\n<p>\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u53c2\u7167\u578b\u5909\u6570\u3092<span>static final<\/span>\u3068\u3057\u3066\u3082\u3001\u5909\u6570\u304c\u6307\u3057\u3066\u3044\u308b\u5148\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4fdd\u6301\u3057\u3066\u3044\u308b\u5024\u304c\u56fa\u5b9a\u3055\u308c\u308b\u3053\u3068\u3068\u306f\u30a4\u30b3\u30fc\u30eb\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u3001\u3053\u3061\u3089\u3082\u610f\u8b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample17 {\r\n\tpublic static final int[] CONSTANT_ARRAY = {1, 2 ,3};\r\n}\r\n\r\nclass StaticFieldSample18 {\r\n\tpublic static void main(String[] args) {\r\n\t\tStaticFieldSample17.CONSTANT_ARRAY[1] = 123; \/\/ \u2190 \u914d\u5217\u306e\u8981\u7d20\u306e\u66f8\u304d\u63db\u3048\u306f\u3067\u304d\u3066\u3057\u307e\u3046\r\n\t}\r\n}<\/pre>\n<h3><span id=\"i-3\">\uff15-\uff12\uff0e\u30ed\u30c3\u30af(\u6392\u4ed6\u5236\u5fa1)\u7528\u306e\u5909\u6570\u3068\u3057\u3066\u4f7f\u3046<\/span><\/h3>\n<p>\u30af\u30e9\u30b9\u304b\u3089\u751f\u6210\u3055\u308c\u305f\u5168\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306e\u6392\u4ed6\u5236\u5fa1\u3092\u884c\u3046\u969b\u306e\u30ed\u30c3\u30af\u7528\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample19 {\r\n\tprivate static final Object LOCK = new Object();\r\n\r\n\tvoid method() {\r\n\t\t\/\/ \u30af\u30e9\u30b9\u3067\u552f\u4e00\u306e\u30ed\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30e2\u30cb\u30bf\u30fc\u3068\u3057\u3066\u51e6\u7406\u3092\u540c\u671f\u3055\u305b\u308b\r\n\t\tsynchronized (LOCK) {\r\n\t\t\t\/\/ \u30af\u30e9\u30b9\u306e\u5168\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u540c\u671f\u3055\u305b\u3066\u5b9f\u884c\u3055\u305b\u305f\u3044\u51e6\u7406\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<p>static\u3068\u6307\u5b9a\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306f\u540c\u4e00\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u3067\u306e\u540c\u671f\u5b9f\u884c\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u304c\u3001\u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3082\u542b\u3081\u305f\u540c\u671f\u306f\u884c\u3048\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u306b\u30ed\u30c3\u30af\u7528\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5fc5\u8981\u3067\u3001\u305d\u306e\u305f\u3081\u306b<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u3067\u306f\u6392\u4ed6\u5236\u5fa1\u306b\u306f<span>java.util.cuncurrent.locks<\/span>\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u3053\u3068\u304c\u666e\u901a\u3067\u3059\u304c\u3001\u305d\u306e\u5834\u5408\u3067\u3082\u30af\u30e9\u30b9\u5358\u4f4d\u3067\u306e\u6392\u4ed6\u5236\u5fa1\u304c\u5fc5\u8981\u306a\u3089\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7528\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">import java.util.concurrent.locks.ReentrantLock;\r\n\r\nclass StaticFieldSample20 {\r\n\tprivate static final ReentrantLock lock = new ReentrantLock(); \/\/ ReentrantLock\u3092static\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u751f\u6210\r\n\r\n\tvoid method() {\r\n\t\tlock.lock(); \/\/ ReentrantLock\u3067\u6392\u4ed6\u5236\u5fa1\u3092\u5b9f\u884c\r\n\t\ttry {\r\n\t\t\t\/\/ \u5168\u3066\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u540c\u671f\u3055\u305b\u3066\u5b9f\u884c\u3055\u305b\u305f\u3044\u51e6\u7406\r\n\t\t} finally {\r\n\t\t\tlock.unlock(); \/\/ \u30ed\u30c3\u30af\u306f\u5fc5\u305a\u89e3\u9664\u3059\u308b\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-1Singleton\">\uff15-\uff13\uff0e1\u3064\u3060\u3051\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u8a3c\u3059\u308b<span>(Singleton<\/span>\u30d1\u30bf\u30fc\u30f3<span>)<\/span><\/span><\/h3>\n<p>\u3042\u308b\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c<span>1<\/span>\u3064\u3060\u3051\u3057\u304b\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u305f\u3044\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306b\u826f\u304f\u4f7f\u3046\u306e\u306f\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e<span>Singleton<\/span>\u3067\u3059\u304c\u3001\u3053\u308c\u306f<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6d3b\u7528\u4e8b\u4f8b\u3068\u3057\u3066\u3082\u6709\u540d\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample21 {\r\n\t\/\/ \u81ea\u5206\u81ea\u8eab\u306e\u552f\u4e00\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6301\u3064static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\tprivate static StaticFieldSample21 instance;\r\n\r\n\t\/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092private\u3068\u3057\u3066\u3001\u5916\u90e8\u304b\u3089\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3055\u305b\u306a\u3044\r\n\tprivate StaticFieldSample21() {\r\n\t}\r\n\r\n\t\/\/ \u552f\u4e00\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u672a\u521d\u671f\u5316\u306a\u3089new\u3057\u3001\u305d\u3046\u3067\u306a\u3051\u308c\u3070static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092return\r\n\t\/\/ \u203b\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3092\u8003\u616e\u3059\u308b\u306a\u3089\u3001synchronized\u30e1\u30bd\u30c3\u30c9\u3068\u3059\u3079\u304d\r\n\tstatic StaticFieldSample21 getInstance() {\r\n\t\tif (instance == null) {\r\n\t\t\tinstance = new StaticFieldSample21();\r\n\t\t}\r\n\t\treturn instance;\r\n\t}\r\n}<\/pre>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u81ea\u5206\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6301\u3061\u3001\u3055\u3089\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f<span>private<\/span>\u3068\u3057\u3066\u5916\u90e8\u304b\u3089\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3092\u4e0d\u53ef\u80fd\u3068\u3057\u307e\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u308a\u3001\u305d\u306e\u4e2d\u3060\u3051\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308c\u3070\u3001<span>Singleton<\/span>\u30d1\u30bf\u30fc\u30f3\u306e\u51fa\u6765\u4e0a\u304c\u308a\u3067\u3059\u3002<\/p>\n<p>Singleton\u306b\u9650\u3089\u305a\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u81ea\u5206\u81ea\u8eab\u306e\u30af\u30e9\u30b9\u3092\u6301\u3064\u3001\u3068\u3044\u3046\u306e\u304c\u521d\u5fc3\u8005\u306b\u306f\u5206\u304b\u308a\u3065\u3089\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u3046\u3044\u3046\u66f8\u304d\u65b9\u3082<span>OK<\/span>\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"i-4\">\uff15-\uff14\uff0e\u56fa\u5b9a\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4f7f\u3046<\/span><\/h3>\n<p>Java\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3044\u304f\u3089\u3067\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092<span>new<\/span>\u3067\u304d\u308b\u306e\u304c\u3044\u3044\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u305d\u308c\u3067\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u3092\u5236\u9650\u3057\u305f\u308a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3044\u307e\u308f\u3057\u305f\u3044\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306b\u3082<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001<span>Integer<\/span>\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3044\u307e\u308f\u3057\u307e\u3059\u3002<span>Integer<\/span>\u306f<span>int<\/span>\u306e\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u3067\u3001\u4f55\u304b\u306e\u6574\u6570\u3092\u8868\u73fe\u3059\u308b\u30af\u30e9\u30b9\u3067\u3059\u3002<span>Integer<\/span>\u81ea\u4f53\u306f\u4e0d\u5909<span>(Immutable)<\/span>\u306a\u306e\u3067\u3001\u540c\u3058\u6570\u5b57<span>(<\/span>\u4f8b\u3048\u3070<span>1)<\/span>\u306a\u306e\u306b\u9055\u3046\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u90fd\u5ea6\u751f\u6210\u3057\u3066\u306f\u30e1\u30e2\u30ea\u306e\u7121\u99c4\u3067\u3059\u3002\u3067\u3059\u306e\u3067\u3001<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3044\u307e\u308f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306fJava\u306eInteger.valueOf(int)\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3067\u3059\u3002IntegerCache\u3068\u3044\u3046\u30af\u30e9\u30b9\u306estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306fInteger\u306e\u914d\u5217\u3067\u3001valueOf\u306e\u5f15\u6570\u3067\u6307\u5b9a\u3055\u308c\u305f\u6574\u6570\u304c\u914d\u5217\u306e\u7bc4\u56f2\u5185\u3067\u3042\u308c\u3070\u3001\u305d\u3053\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u3042\u308bInteger\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u623b\u3057\u3066\u3044\u307e\u3059\u3002new\u3059\u308b\u306e\u306f\u914d\u5217\u306e\u7bc4\u56f2\u5916\u306e\u6574\u6570\u306e\u5834\u5408\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ java.lang.Integer\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u629c\u7c8b(Java 10\u7248)\r\npublic static Integer valueOf(int i) {\r\n    if (i &gt;= IntegerCache.low &amp;&amp; i &lt;= IntegerCache.high)\r\n        return IntegerCache.cache[i + (-IntegerCache.low)];\r\n    return new Integer(i);\r\n}\r\n\r\nprivate static class IntegerCache {\r\n    static final int low = -128;\r\n    static final int high;\r\n    static final Integer cache[];\r\n\r\n    \u2026\u7701\u7565\u2026\r\n}<\/pre>\n<p>\u5b9f\u969b\u306b<span>valueOf<\/span>\u3067\u623b\u308b<span>Integer<\/span>\u304c\u540c\u3058\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304b\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5c0f\u3055\u306a\u6574\u6570<span>(0<\/span>\u3084<span>1<\/span>\u3068\u304b<span>)<\/span>\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\u826f\u304f\u4f7f\u308f\u308c\u308b\u306e\u3067\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5229\u7528\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3092\u52b9\u7387\u5316\u3057\u3066\u3044\u308b\u306e\u3067\u3059\u306d\u3002\u3053\u306e\u8003\u3048\u306f\u3001\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e<span>Flyweight<\/span>\u30d1\u30bf\u30fc\u30f3\u306b\u3082\u901a\u3058\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample22 {\r\n\tpublic static void main(Sting[] args) {\r\n\t\tObject i1 = Integer.valueOf(1);\r\n\t\tObject i2 = Integer.valueOf(1);\r\n\t\tObject i3 = Integer.valueOf(65535);\r\n\t\tObject i4 = Integer.valueOf(65535);\r\n\r\n\t\tSystem.out.println(i1 == i2); \/\/ \u2192 true \u540c\u3058\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9!!\r\n\t\tSystem.out.println(i3 == i4); \/\/ \u2192 false \u9055\u3046\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9!!\r\n\t}\r\n}<\/pre>\n<h2><span id=\"static-3\">\uff16\uff0estatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u60aa\u7528\u4f8b<\/span><\/h2>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3044\u308f\u3086\u308b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u7684\u306b\u306f\u4f7f\u3046\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample23 {\r\n\tstatic int input; \/\/ \u5165\u529b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u4f7f\u3046static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\tstatic int output; \/\/ \u51fa\u529b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u4f7f\u3046static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\r\n\t\/\/ \u4f55\u304b\u306e\u8a08\u7b97\u3092\u884c\u3046\u30e1\u30bd\u30c3\u30c9\r\n\tstatic void calculate() {\r\n\t\toutput = input * 100; \/\/ \u8a08\u7b97\u306fstatic\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u884c\u3044\u3001\u7d50\u679c\u3082static\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u623b\u3059\r\n\t}\r\n}\r\n\r\nclass StaticFieldSample24 {\r\n\tpublic static void main(String[] args) {\r\n\t\tStaticFieldSample23.input = 123;\r\n\t\tStaticFieldSample23.calculate();\r\n\t\tSystem.out.println(StaticFieldSample23.output); \/\/ \u2192 123 * 100\u306e\u7d50\u679c\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class StaticFieldSample25 {\r\n\tstatic int sharedVariable; \/\/ \u8907\u6570\u306e\u30af\u30e9\u30b9\u9593\u3067\u5171\u6709\u3057\u305f\u3044\u5024\r\n}\r\n\r\nclass StaticFieldSample26 {\r\n\tvoid setSharedVariable() {\r\n\t\tStaticFieldSample25.sharedVariable = 100; \/\/ \u3053\u3061\u3089\u306e\u30af\u30e9\u30b9\u3067\u8a2d\u5b9a\u3057\u3066\u2026\r\n\t}\r\n}\r\n\r\nclass StaticFieldSample27 {\r\n\tvoid getSharedVariable() {\r\n\t\tSystem.out.println(StaticFieldSample25.sharedVariable); \/\/ \u3053\u3061\u3089\u306e\u30af\u30e9\u30b9\u3067\u8aad\u307f\u3060\u3059\r\n\t}\r\n}<\/pre>\n<p>\u306a\u305cstatic\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u3053\u306e\u3088\u3046\u306b\u4f7f\u3063\u3066\u306f\u306a\u3089\u306a\u3044\u306e\u304b\u3068\u3044\u3046\u3068\u3001\u3053\u308c\u306f\u6614\u304b\u3089\u3042\u308b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570(\u5e83\u57df\u5909\u6570)\u306e\u4f7f\u3044\u65b9\u305d\u306e\u3082\u306e\u3067\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u624b\u8efd\u306b\u4f7f\u3048\u3066\u4fbf\u5229\u306a\u53cd\u9762\u3001\u4ee5\u4e0b\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u3001\u6570\u591a\u304f\u306e\u30d0\u30b0\u3092\u751f\u307f\u51fa\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>\u3069\u3053\u3067\u305d\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u628a\u63e1\u3059\u308b\u306e\u304c\u96e3\u3057\u3044<\/li>\n<li>\u8ab0\u304c\u3069\u3053\u3067\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u5024\u3092\u5909\u66f4\u3057\u305f\u304b\u304c\u7c21\u5358\u306b\u306f\u8ffd\u3044\u304b\u3051\u3089\u308c\u306a\u3044<\/li>\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306e\u8a2d\u5b9a\u5024\u304c\u6b63\u3057\u3044\u3068\u4fdd\u8a3c\u3059\u308b\u306e\u304c\u96e3\u3057\u3044<span>(<\/span>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3060\u3068\u9855\u8457<span>)<\/span><\/li>\n<\/ul>\n<p>\u305d\u3082\u305d\u3082<span>Java<\/span>\u306a\u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u8ab2\u984c\u3092\u6539\u5584\u3059\u308b\u305f\u3081\u306b\u751f\u307e\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u5024\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3067\u306f\u306a\u304f\u30af\u30e9\u30b9\u306b\u6301\u305f\u305b\u3066\u5909\u6570\u3092\u7ba1\u7406\u3059\u308b\u4e3b\u4f53\u3092\u660e\u78ba\u306b\u3057\u3001\u304b\u3064\u5909\u6570\u306e\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u308a\u305d\u308c\u3092\u5fb9\u5e95\u3059\u308b\u306e\u304c\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u306e\u8003\u3048\u65b9\u3067\u3059\u3002<\/p>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u7684\u306b\u4f7f\u3048\u308b\u304b\u3089\u3068\u8a00\u3063\u3066\u3001\u904e\u53bb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u3088\u3046\u306a\u4f7f\u3044\u65b9\u3092\u3057\u3066\u3044\u3066\u306f\u3001\u306a\u304f\u305b\u308b\u30d0\u30b0\u3082\u306a\u304f\u305b\u307e\u305b\u3093\u3002\u305b\u3063\u304b\u304f<span>Java<\/span>\u3092\u4f7f\u3046\u306e\u3067\u3059\u304b\u3089\u3001\u30d0\u30b0\u304c\u5c11\u306a\u304f\u306a\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4f5c\u308a\u65b9\u3092\u3057\u305f\u3044\u3082\u306e\u3067\u3059\u306d\u3002<\/p>\n<h2><span id=\"i-5\">\uff17\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u306f\u3001\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3067\u3042\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002\u4f7f\u3044\u65b9\u305d\u306e\u3082\u306e\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u30af\u30e9\u30b9\u552f\u4e00\u306e\u5909\u6570\u3067\u3042\u308b\u3053\u3068\u306f\u5e38\u306b\u5ff5\u982d\u306b\u7f6e\u3044\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>static\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f7f\u3044\u65b9\u30fb\u6d3b\u7528\u65b9\u6cd5\u306f\u69d8\u3005\u3067\u3001\u4fbf\u5229\u306b\u4f7f\u3048\u307e\u3059\u3002\u3067\u3059\u304c\u3001\u3080\u3084\u307f\u3084\u305f\u3089\u306b\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u7684\u306b\u7528\u3044\u308b\u3053\u3068\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u8a00\u8a9e\u306e\u9032\u5316\u306e\u610f\u5473\u306b\u53cd\u3059\u308b\u3053\u3068\u3067\u3082\u3042\u308b\u306e\u3067\u3001\u3069\u306e\u3088\u3046\u306b\u4f7f\u3046\u304b\u3092\u826f\u304f\u8003\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306bstatic\u3068\u6307\u5b9a\u3059\u308b\u3068\u3001\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3067\u3042\u308bstatic\u30d5\u30a3\u30fc\u30eb\u30c9(static\u5909\u6570\u3001\u30af\u30e9\u30b9\u5909\u6570\u3068\u3082)\u3068\u306a\u308a\u307e\u3059\u3002\u3054\u5b58\u3058\u306e\u3068\u304a\u308a\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u306f\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3067\u306f\u306a\u3044\u5909\u6570\u306e\u3053\u3068\u3067\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306fs [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":804,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/876"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=876"}],"version-history":[{"count":6,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/876\/revisions"}],"predecessor-version":[{"id":5690,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/876\/revisions\/5690"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/804"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}