{"id":888,"date":"2018-11-07T12:00:33","date_gmt":"2018-11-07T03:00:33","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=888"},"modified":"2025-09-17T13:42:19","modified_gmt":"2025-09-17T04:42:19","slug":"java-static-method","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/java-static-method","title":{"rendered":"Java\u306estatic\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u5ba3\u8a00\u65b9\u6cd5\u3084\u4f7f\u3044\u65b9\u3001\u6d3b\u7528\u65b9\u6cd5\u3092\u89e3\u8aac"},"content":{"rendered":"<p>Java\u306e\u30af\u30e9\u30b9\u304c\u6301\u3066\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3001<span style=\"text-decoration: underline;\">\u30e1\u30bd\u30c3\u30c9\u306e\u6240\u6709\u8005\u306e\u9055\u3044\u306e\u89b3\u70b9\u304b\u3089\u3059\u308b\u3068\u4e8c\u7a2e\u985e<\/span>\u3042\u308a\u307e\u3059\u3002<span>static<\/span>\u4fee\u98fe\u5b50\u3092\u9069\u7528\u3057\u305f<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3068\u3001<span>static<\/span>\u3067\u306f\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u3001\u3059\u306a\u308f\u3061\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306b\u76f4\u63a5\u5c5e\u3057\u3001\u30af\u30e9\u30b9\u304c\u5b9f\u884c\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u5c5e\u3057\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5b9f\u884c\u3059\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u7570\u306a\u308b\u3082\u306e\u3067\u3059\u3002\u4f7f\u3044\u3069\u3053\u308d\u3082\u3082\u3061\u308d\u3093\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u8981\u6027\u304c\u3042\u308a\u5b58\u5728\u3059\u308b\u306e\u3067\u3059\u304c\u3001\u521d\u7d1a\u8005\u306b\u3068\u3063\u3066\u306f\u7406\u89e3\u304c\u96e3\u3057\u3044\u3082\u306e\u3067\u3059\u3002\u306a\u305c\u308f\u3056\u308f\u3056\u4e8c\u7a2e\u985e\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u306e\u304b\u5206\u304b\u308a\u3065\u3089\u3044\u3067\u3059\u3088\u306d<span>? <\/span>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u305d\u3093\u306a\u4eba\u306e\u305f\u3081\u306b\u3001<strong><span class=\"f-marker-p\">static\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e<\/span><\/strong>\u304b\u3089\u304a\u4f1d\u3048\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\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u304c\u5b9f\u884c\u3059\u308b\u30e1\u30bd\u30c3\u30c9<\/a><ul><li><a href=\"#-static\">\uff11-\uff11\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4f9d\u5b58\u3057\u306a\u3044\u51e6\u7406<\/a><\/li><\/ul><\/li><li><a href=\"#Javastatic-2\">\uff12\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/a><\/li><li><a href=\"#Javastatic-3\">\uff13\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/a><\/li><li><a href=\"#Javastatic-4\">\uff14\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u6ce8\u610f\u4e8b\u9805<\/a><ul><li><a href=\"#-static-2\">\uff14-\uff11\uff0estatic\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\u306f\u540c\u3058\u306b\u3067\u304d\u306a\u3044<\/a><\/li><li><a href=\"#-static-3\">\uff14-\uff12\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306e\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058<\/a><\/li><li><a href=\"#-staticabstract\">\uff14-\uff13\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306fabstract\u306b\u306f\u3067\u304d\u306a\u3044<\/a><\/li><li><a href=\"#-static-4\">\uff14-\uff14\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011static\u30e1\u30bd\u30c3\u30c9\u306f\u7d99\u627f\u3055\u308c\u306a\u3044<\/a><\/li><\/ul><\/li><li><a href=\"#static\">\uff15\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u65b9\u6cd5<\/a><ul><li><a href=\"#i\">\uff15-\uff11\uff0e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306e\u6d3b\u7528<\/a><\/li><li><a href=\"#-static-5\">\uff15-\uff12\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011static\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306e\u6d3b\u7528<\/a><\/li><li><a href=\"#-Singleton\">\uff15-\uff13\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011Singleton\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u5229\u7528<\/a><\/li><\/ul><\/li><li><a href=\"#static-2\">\uff16\uff0e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306estatic\u30e1\u30bd\u30c3\u30c9<\/a><\/li><li><a href=\"#static-3\">\uff17\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011static\u30e1\u30bd\u30c3\u30c9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\u306e\u8003\u3048\u65b9\u4f8b<\/a><\/li><li><a href=\"#i-2\">\uff18\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Javastatic\">\uff11\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u304c\u5b9f\u884c\u3059\u308b\u30e1\u30bd\u30c3\u30c9<\/span><\/h2>\n<p>Java\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u5fc5\u305a\u4f55\u304b\u306e\u30af\u30e9\u30b9\u306b\u5c5e\u3057\u307e\u3059\u3002\u305d\u306e\u4e0a\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u884c\u8005\u306e\u9055\u3044\u306e\u89b3\u70b9\u304b\u3089\u306f\u3001\u4ee5\u4e0b\u306e\u4e8c\u3064\u306b\u5206\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<blockquote>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5b9f\u884c\u3059\u308b<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9<span>(<\/span>\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9<span>)<\/span>\uff1a\u30af\u30e9\u30b9\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3001\u30af\u30e9\u30b9\u304c\u5b9f\u884c\u3059\u308b<\/p>\n<p>\u3000\u3000\u203b\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u304c\u3001\u3053\u306e\u8a18\u4e8b\u4e2d\u3067\u306f<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u7d71\u4e00\u3057\u307e\u3059<\/p>\n<\/blockquote>\n<p>\u3053\u308c\u4ee5\u5916\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u5206\u985e\u306b\u306f\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u304b\u3069\u3046\u304b\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u304c\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u7406\u89e3\u306f\u3001\u307e\u305a\u306f\u8ab0\u304c\u5b9f\u884c\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306a\u306e\u304b\u306b\u6ce8\u76ee\u3059\u308b\u3068\u3053\u308d\u304b\u3089\u30b9\u30bf\u30fc\u30c8\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"-static\">\uff11-\uff11\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4f9d\u5b58\u3057\u306a\u3044\u51e6\u7406<\/span><\/h3>\n<p>\u7686\u3055\u3093\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306f\u30af\u30e9\u30b9\u3092\u3072\u306a\u578b\u3068\u3057\u3066\u751f\u6210<span>(new)<\/span>\u3055\u308c\u305f\u5177\u4f53\u7684\u306a\u30e2\u30ce<span>\u2026<\/span>\u3068\u3044\u3046\u77e5\u8b58\u306f\u304a\u6301\u3061\u3067\u3057\u3087\u3046\u3002\u3067\u3059\u304b\u3089\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306f\u30a4\u30e1\u30fc\u30b8\u304c\u3057\u3084\u3059\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u4f55\u304b\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u3088\u3046\u6307\u793a\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3001\u3072\u306a\u578b\u3067\u3057\u304b\u306a\u3044\u30af\u30e9\u30b9\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3068\u306f\u3069\u3046\u3044\u3046\u3053\u3068\u306a\u306e\u304b\u3001\u306a\u304b\u306a\u304b\u30a4\u30e1\u30fc\u30b8\u306f\u3057\u3065\u3089\u3044\u3067\u3059\u3002\u305f\u3060\u3001\u3053\u308c\u306f\u73fe\u5b9f\u4e16\u754c\u3078\u306e\u6bd4\u55a9\u3092\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4e16\u754c\u306b\u7121\u7406\u306b\u6301\u3061\u8fbc\u3082\u3046\u3068\u3057\u3066\u3044\u308b\u304b\u3089\u30a4\u30e1\u30fc\u30b8\u3057\u3065\u3089\u3044\u306e\u3067\u3042\u3063\u3066\u3001\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4f9d\u5b58\u3057\u306a\u3044\u51e6\u7406\u300d\u306e\u3053\u3068\u306a\u306e\u3060\u3068\u5272\u308a\u5207\u3063\u3066\u3082\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u524d\u8ff0\u306e\u3068\u304a\u308a\u3001<span>Java<\/span>\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u4f55\u304b\u306e\u30af\u30e9\u30b9\u306b\u5c5e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6301\u3061\u7269\u3067\u306a\u3044\u306a\u3089\u3070\u3001\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3068\u3057\u3088\u3046\u3068\u3044\u3046\u3060\u3051\u306a\u306e\u3067\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u3063\u3066\u3044\u308b\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u5b58\u5728\u3057\u306a\u3044\u72b6\u614b\u3067\u3082\u30e1\u30bd\u30c3\u30c9<span>(=<\/span>\u51e6\u7406<span>)<\/span>\u3092\u547c\u3073\u51fa\u3057\u305f\u3044\u3053\u3068\u304c\u591a\u3005\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u6642\u306b\u4f7f\u3046\u306e\u304c<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306a\u306e\u3067\u3059\u3002<\/p>\n<h2><span id=\"Javastatic-2\">\uff12\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/span><\/h2>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u5ba3\u8a00\u3067\u306e\u623b\u308a\u5024\u306e\u524d\u306b<span> &#8220;static&#8221; <\/span>\u3092\u4ed8\u3051\u308b\u3060\u3051\u3067\u3059\u3002\u3053\u308c\u3060\u3051\u3067\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample1 {\r\n\t\/\/ static\u3092\u4ed8\u3051\u308c\u3070static\u30e1\u30bd\u30c3\u30c9\u306b\u306a\u308b\r\n\tstatic void staticMethod() {\r\n\t}\r\n\r\n\t\/\/ static\u3092\u4ed8\u3051\u306a\u3051\u308c\u3070\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306b\u306a\u308b\r\n\tvoid instanceMethod() {\r\n\t}\r\n}<\/pre>\n<p>\u6700\u3082\u5927\u4e8b\u306a\u306e\u306f\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u5c5e\u3059\u308b\u30e2\u30ce\u306f\u4e00\u5207\u53c2\u7167\u3067\u304d\u307e\u305b\u3093\u3057\u3001\u5b9f\u884c\u3082\u3067\u304d\u306a\u3044\u3053\u3068\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u30fb<span>static<\/span>\u3067\u306f\u306a\u3044\u5185\u90e8\u30af\u30e9\u30b9\u30fb<span>this\/super<\/span>\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002\u4f7f\u3046\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u30af\u30e9\u30b9\u81ea\u8eab\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u30fb\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u304b\u3089\u3067\u3059\u3002\u3067\u3059\u304b\u3089\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u306f<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3084\u4ed6\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3001\u5f15\u6570\u3092\u4f7f\u3063\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample2 {\r\n\tint instanceField = 100; \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\tstatic int staticField = 999; \/\/ static\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\r\n\tvoid instanceMethod() { \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\r\n\t}\r\n\r\n\tstatic void otherStaticMethod() { \/\/ \u4ed6\u306estatic\u30e1\u30bd\u30c3\u30c9\r\n\t}\r\n\r\n\tclass InstanceInnerClass { \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5185\u90e8\u30af\u30e9\u30b9\r\n\t}\r\n\r\n\tstatic class StaticInnerClass { \/\/ static\u306a\u5185\u90e8\u30af\u30e9\u30b9\r\n\t}\r\n\r\n\t\/\/ static\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u53c2\u7167\u30fb\u5b9f\u884c\u3067\u304d\u308b\u3082\u306e\u306f\u4f55\u304b?\r\n\tstatic void staticMethod(int argument) {\r\n\t\tSystem.out.println(staticField); \/\/ \u3007\uff1astatic\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u4f7f\u3048\u308b\r\n\t\tSystem.out.println(argument); \/\/ \u3007\uff1a\u5f15\u6570\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u69d8\u306b\u4f7f\u3048\u308b\r\n\t\totherStaticMethod(); \/\/ \u3007\uff1astatic\u30e1\u30bd\u30c3\u30c9\u306a\u3089\u547c\u3073\u51fa\u305b\u308b\r\n\t\tStaticInnerClass c1 = new StaticInnerClass(); \/\/ \u3007\uff1astatic\u3067\u306a\u3044\u5185\u90e8\u30af\u30e9\u30b9\u306fnew\u3067\u304d\u308b\r\n\r\n\t\t\/\/ \u4ee5\u4e0b\u306e\u3044\u305a\u308c\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6301\u3061\u7269\u306b\u300c\u76f4\u63a5\u300d\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u308b\u305f\u3081\r\n\t\tSystem.out.println(instanceField); \/\/ \u00d7\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u53c2\u7167\u3067\u304d\u306a\u3044\r\n\t\tinstanceMethod(); \/\/ \u00d7\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u5b9f\u884c\u3067\u304d\u306a\u3044\r\n\t\tthis.instanceMethod(); \/\/ \u00d7\uff1athis\u306f\u53c2\u7167\u3067\u304d\u306a\u3044\r\n\t\tsuper.toString(); \/\/ \u00d7\uff1asuper\u306f\u53c2\u7167\u3067\u304d\u306a\u3044\r\n\t\tInstanceInnerClass c2 = new InstanceInnerClass(); \/\/ \u00d7\uff1astatic\u3067\u306a\u3044\u5185\u90e8\u30af\u30e9\u30b9\u306f\u76f4\u63a5\u53c2\u7167\u3067\u304d\u306a\u3044\r\n\t}\r\n}<\/pre>\n<p>\u306a\u304a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6301\u3061\u7269\u3092\u76f4\u63a5\u53c2\u7167\u30fb\u5b9f\u884c\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u3060\u3051\u3067\u3042\u3063\u3066\u3001\u9593\u63a5\u7684\u306b\u306a\u3089\u5927\u4e08\u592b\u3067\u3059\u3002\u3064\u307e\u308a\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u81ea\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u305f\u308a\u3001\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u306e\u306a\u3089\u666e\u901a\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u5834\u5408\u3067\u3082\u3001\u3042\u304f\u307e\u3067\u500b\u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u6301\u3064\u30d5\u30a3\u30fc\u30eb\u30c9\u30fb\u30e1\u30bd\u30c3\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u308b\u3060\u3051<span>\u2026<\/span>\u3068\u3044\u3046\u3053\u3068\u306f\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample3 {\r\n\tint instanceField = 100; \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\r\n\r\n\tvoid instanceMethod() { \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\r\n\t}\r\n\r\n\tclass InstanceInnerClass { \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5185\u90e8\u30af\u30e9\u30b9\r\n\t}\r\n\r\n\tstatic void staticMethod(StaticMethodSample3 sample1) {\r\n\t\tStaticMethodSample3 sample2 = new StaticMethodSample3(); \/\/ static\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u306f\u3067\u304d\u308b\r\n\r\n\t\t\/\/ \u5909\u6570\u304c\u6307\u3059\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3078\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\r\n\t\tSystem.out.println(sample1.instanceField);\r\n\t\tSystem.out.println(sample2.instanceField);\r\n\r\n\t\t\/\/ \u5909\u6570\u304c\u6307\u3059\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u547c\u3073\u51fa\u305b\u308b\r\n\t\tsample1.instanceMethod();\r\n\t\tsample2.instanceMethod();\r\n\r\n\t\t\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5185\u90e8\u30af\u30e9\u30b9\u3078\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7d4c\u7531\u3059\u308c\u3070new\u3067\u304d\u308b\r\n\t\tInstanceInnerClass c1 = sample1.new InstanceInnerClass();\r\n\t\tInstanceInnerClass c2 = sample2.new InstanceInnerClass();\r\n\t}\r\n}<\/pre>\n<h2><span id=\"Javastatic-3\">\uff13\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/span><\/h2>\n<p>\u5ba3\u8a00\u3057\u305f<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u306b\u306f\u3001\u539f\u5247\u3068\u3057\u3066<span>\u201d<\/span>\u30af\u30e9\u30b9\u540d<span>.static<\/span>\u30e1\u30bd\u30c3\u30c9\u540d<span>\u201d<\/span>\u3068\u6307\u5b9a\u3057\u307e\u3059\u3002\u524d\u8ff0\u3057\u305f\u3068\u304a\u308a\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3067\u3059\u304b\u3089\u3001\u30af\u30e9\u30b9\u540d\u3092\u7d4c\u7531\u3057\u3066\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u306e\u3067\u3059\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u305f\u30af\u30e9\u30b9\u5185\u3084\u30b5\u30d6\u30af\u30e9\u30b9\u5185\u3067\u4f7f\u3046\u306a\u3089\u3001\u30af\u30e9\u30b9\u540d\u90e8\u5206\u306e\u6307\u5b9a\u306f\u4e0d\u8981\u3067\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u304b\u3089\u3082\u540c\u3058\u3088\u3046\u306b\u547c\u3073\u51fa\u305b\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample4 {\r\n\tstatic void staticMethod() {\r\n\t}\r\n\r\n\tstatic void staticMethod2() {\r\n\t\tstaticMethod(); \/\/ \u81ea\u30af\u30e9\u30b9\u5185\u304b\u3089\u306e\u547c\u3073\u51fa\u3057\u306a\u306e\u3067\u3001\u30af\u30e9\u30b9\u540d\u306f\u4e0d\u8981\r\n\t\tStaticMethodSample4.staticMethod(); \/\/ \u3053\u308c\u3067\u3082\u6587\u6cd5\u4e0a\u306f\u554f\u984c\u306a\u3044\r\n\t}\r\n\r\n\tvoid instanceMethod() {\r\n\t\tstaticMethod(); \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u3082\u30af\u30e9\u30b9\u540d\u306a\u3057\u3067\u547c\u3073\u51fa\u305b\u308b\r\n\t}\r\n}\r\n\r\nclass StaticMethodSample5 {\r\n\tstatic void staticMethod() {\r\n\t\tStaticMethodSample4.staticMethod(); \/\/ \u9055\u3046\u30af\u30e9\u30b9\u304b\u3089\u547c\u3073\u51fa\u3059\u3068\u304d\u306f\u3001\u30af\u30e9\u30b9\u540d.static\u30e1\u30bd\u30c3\u30c9\u540d\u3068\u3059\u308b\r\n\t}\r\n\r\n\tvoid instanceMethod() {\r\n\t\tStaticMethodSample4.staticMethod(); \/\/ \u9055\u3046\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u547c\u3073\u51fa\u3059\u3068\u304d\u3082\u540c\u3058\u3084\u308a\u65b9\r\n\t}\r\n}\r\n\r\n\/\/ \u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u304b\u3089\u3082\u30af\u30e9\u30b9\u540d\u4e0d\u8981\u3067\u547c\u3073\u51fa\u305b\u308b\r\nclass StaticMethodSample6 extends StaticMethodSample4 {\r\n\tstatic void staticMethod3() {\r\n\t\tstaticMethod(); \/\/ StaticMethodSample4\u306estaticMethod()\r\n\t}\r\n\r\n\tvoid instanceMethod2() {\r\n\t\tstaticMethod();  \/\/ \u540c\u3058\u304fStaticMethodSample4\u306estaticMethod()\r\n\t}\r\n}<\/pre>\n<p>\u306a\u304a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9(\u3092\u6307\u3059\u5909\u6570)\u7d4c\u7531\u3067\u3082static\u30e1\u30bd\u30c3\u30c9\u306f\u547c\u3073\u51fa\u305b\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u3092\u547c\u3073\u51fa\u3059\u306e\u3067\u3059\u304b\u3089\u30af\u30e9\u30b9\u3092\u7d4c\u7531\u3059\u308b\u306e\u304c\u81ea\u7136\u3067\u3059\u3057\u3001\u666e\u901a\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample7 {\r\n\tstatic void staticMethod() {\r\n\t}\r\n\r\n\tvoid instanceMethod() {\r\n\t\tthis.staticMethod(); \/\/ this\u7d4c\u7531\u3067\u3082\u547c\u3073\u51fa\u305b\u308b\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tStaticMethodSample7 sample = new StaticMethodSample7();\r\n\t\tsample.staticMethod(); \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9(\u3092\u6307\u3059\u5909\u6570)\u7d4c\u7531\u3067\u3082\u547c\u3073\u51fa\u305b\u308b\r\n\t}\r\n}<\/pre>\n<p>\u3057\u304b\u3082\u3001\u958b\u767a\u74b0\u5883\u306b\u3088\u3063\u3066\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7d4c\u7531\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306f\u8b66\u544a\u6271\u3044\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<span>Eclipse<\/span>\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8b66\u544a\u304c\u51fa\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3067\u306f\u306a\u3044\u306e\u3067\u52d5\u304b\u3059\u5206\u306b\u306f\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3042\u307e\u308a\u826f\u3044\u66f8\u304d\u65b9\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\u578b StaticMethodSample7 \u304b\u3089\u306e static \u30e1\u30bd\u30c3\u30c9 staticMethod() \u306b\u306f static \u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/pre>\n<h2><span id=\"Javastatic-4\">\uff14\uff0e\u3010Java\u3011static\u30e1\u30bd\u30c3\u30c9\u306e\u6ce8\u610f\u4e8b\u9805<\/span><\/h2>\n<h3><span id=\"-static-2\">\uff14-\uff11\uff0estatic\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\u306f\u540c\u3058\u306b\u3067\u304d\u306a\u3044<\/span><\/h3>\n<p>static\u30e1\u30bd\u30c3\u30c9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3<span>(<\/span>\u30e1\u30bd\u30c3\u30c9\u540d\u3001\u5f15\u6570\u306e\u578b\u30fb\u4e26\u3073\u9806<span>)<\/span>\u306f\u540c\u3058\u306b\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3059\u306a\u308f\u3061\u3001\u4ee5\u4e0b\u306e\u30e1\u30bd\u30c3\u30c9\u5ba3\u8a00\u306f\u884c\u3048\u305a\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample8 {\r\n\tvoid method(int i) {\r\n\t}\r\n\t\r\n\tstatic void method(int x) { \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068static\u30e1\u30bd\u30c3\u30c9\u306f\u540c\u3058\u30b7\u30b0\u30cd\u30c1\u30e3\u306b\u306f\u3067\u304d\u306a\u3044!!\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-static-3\">\uff14-\uff12\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306e\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058<\/span><\/h3>\n<p>private\/protected\/public\u306e\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306e\u50cd\u304d\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u3082\u6b63\u3057\u3044\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample9 {\r\n\t\/\/ public\u306astatic\u30e1\u30bd\u30c3\u30c9\u3001\u5168\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u5168\u30af\u30e9\u30b9\u304b\u3089\u53c2\u7167\u3067\u304d\u308b\r\n\tpublic static void publicStaticMethod() {\r\n\t}\r\n\t\r\n\t\/\/ protected\u306astatic\u30e1\u30bd\u30c3\u30c9\u3001\u540c\u4e00\u30d1\u30c3\u30b1\u30fc\u30b8\u307e\u305f\u306f\u7d99\u627f\u5148\u30af\u30e9\u30b9\u304b\u3089\u306e\u307f\u53c2\u7167\u3067\u304d\u308b\r\n\tprotected static void protectedStaticMethod() {\r\n\t}\r\n\t\r\n\t\/\/ package private\u306astatic\u30e1\u30bd\u30c3\u30c9\u3001\u540c\u4e00\u30d1\u30c3\u30b1\u30fc\u30b8\u304b\u3089\u306e\u307f\u53c2\u7167\u3067\u304d\u308b\r\n\tstatic void packagePrivateStaticMethod() {\r\n\t}\r\n\r\n\t\/\/ private\u306astatic\u30e1\u30bd\u30c3\u30c9\u3001\u540c\u4e00\u30af\u30e9\u30b9\u5185\u304b\u3089\u306e\u307f\u53c2\u7167\u3067\u304d\u308b\r\n\tprivate static void privateStaticMethod() {\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-staticabstract\">\uff14-\uff13\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306f<span>abstract<\/span>\u306b\u306f\u3067\u304d\u306a\u3044<\/span><\/h3>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306f\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9<span>(abstract)<\/span>\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u5f8c\u8ff0\u3057\u307e\u3059\u304c\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306e\u7d99\u627f\u306e\u5bfe\u8c61\u5916\u3067\u3059\u306e\u3067\u3001<span>abstract<\/span>\u3068\u3059\u308b\u3053\u3068\u306b\u610f\u5473\u304c\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">abstract class StaticMethodSample10 {\r\n\tabstract static void staticMethod(); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!!\r\n}<\/pre>\n<h3><span id=\"-static-4\">\uff14-\uff14\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011static\u30e1\u30bd\u30c3\u30c9\u306f\u7d99\u627f\u3055\u308c\u306a\u3044<\/span><\/h3>\n<p>\u4f55\u56de\u3082\u304a\u4f1d\u3048\u3057\u305f\u3068\u304a\u308a\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u56fa\u6709\u306e\u6301\u3061\u7269\u3067\u3059\u3002\u3053\u308c\u306f\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u30b5\u30d6\u30af\u30e9\u30b9\u3078\u7d99\u627f\u3055\u308c\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u30fb\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u540c\u3058\u30b7\u30b0\u30cd\u30c1\u30e3\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306a\u3089\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u305f\u3082\u306e\u304c\u4f7f\u308f\u308c\u307e\u3059\u304c\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3069\u306e\u30af\u30e9\u30b9\u306e\u3082\u306e\u304b\u660e\u793a\u3057\u306a\u3044\u306a\u3089\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample11 {\r\n\tstatic void staticMethod() {\r\n\t\tSystem.out.println(\"StaticMethodSample11.staticMethod()\");\r\n\t}\r\n\r\n\tvoid instanceMethod() {\r\n\t\tSystem.out.println(\"StaticMethodSample11.instanceMethod()\");\r\n\t}\r\n\r\n\tvoid invokeMethod() { \/\/ \u30b5\u30d6\u30af\u30e9\u30b9\u304b\u3089\u547c\u3073\u51fa\u3055\u308c\u305f\u5834\u5408\u306f\u2026\r\n\t\tstaticMethod(); \/\/ \u3053\u306e\u30af\u30e9\u30b9\u306estaticMethod\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\r\n\t\tinstanceMethod(); \/\/ \u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u305finstanceMethod\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\r\n\t}\r\n}\r\n\r\nclass StaticMethodSample12 extends StaticMethodSample11 {\r\n\t\/\/ \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306b\u3042\u308b\u3082\u306e\u3068\u540c\u3058\u30b7\u30b0\u30cd\u30c1\u30e3\u306estatic\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\r\n\t\/\/ \u3053\u306e\u30af\u30e9\u30b9\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u306f\u3001\u5358\u7d14\u540d\u3068\u3057\u3066\u306estaticMethod()\u306f\u3053\u308c\u306b\u306a\u308b\r\n\tstatic void staticMethod() {\r\n\t\tSystem.out.println(\"StaticMethodSample12.staticMethod()\");\r\n\t}\r\n\r\n\t\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u3066\u307f\u308b\r\n\tvoid instanceMethod() {\r\n\t\tSystem.out.println(\"StaticMethodSample12.instanceMethod()\");\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tnew StaticMethodSample11().invokeMethod();\r\n\t\tnew StaticMethodSample12().invokeMethod();\r\n\t\tstaticMethod(); \/\/ \u3053\u306e\u30af\u30e9\u30b9\u3067\u5ba3\u8a00\u3055\u308c\u305fstatic\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u306b\u306a\u308b\r\n\t\tStaticMethodSample11.staticMethod(); \/\/ \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u540c\u540dstatic\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u305f\u3044\u306a\u3089\u3001\u30af\u30e9\u30b9\u3092\u7d4c\u7531\u3059\u308b\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ StaticMethodSample12\u306e\u5b9f\u884c\u4f8b\r\nStaticMethodSample11.staticMethod()\r\nStaticMethodSample11.instanceMethod()\r\nStaticMethodSample11.staticMethod() \u2190\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306estaticMethod\u304c\u547c\u3073\u51fa\u3055\u308c\u3066\u3044\u308b\r\nStaticMethodSample12.instanceMethod()\r\nStaticMethodSample12.staticMethod()\r\nStaticMethodSample11.staticMethod()<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306a\u52d5\u304d\u306b\u306a\u308b\u306e\u306f\u3001<span>Java<\/span>\u306e\u7d99\u627f\u3067\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u307e\u3059\u304c\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u3055\u308c\u306a\u3044\u305f\u3081\u3067\u3059\u3002\u3053\u306e\u52d5\u304d\u304b\u3089\u3082\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u306e\u3082\u306e\u3060\u3068\u3044\u3046\u3053\u3068\u304c\u5206\u304b\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2><span id=\"static\">\uff15\uff0estatic\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u65b9\u6cd5<\/span><\/h2>\n<h3><span id=\"i\">\uff15-\uff11\uff0e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306e\u6d3b\u7528<\/span><\/h3>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u3082\u666e\u901a\u306e\u4f7f\u3044\u65b9\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u72b6\u614b\u306b\u4f9d\u5b58\u3057\u306a\u3044\u51e6\u7406\u3092\u3055\u305b\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9\u3068\u3082\u547c\u3070\u308c\u3001\u6c7a\u307e\u308a\u304d\u3063\u305f\u51e6\u7406\u306a\u3069\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002\u6a19\u6e96<span>API<\/span>\u3067\u306f<span>String<\/span>\u3084<span>Integer<\/span>\u306a\u3069\u306b\u3082\u591a\u304f\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3057\u3001<span>Collections<\/span>\u3084<span>Arrays<\/span>\u306a\u3069\u306b\u3042\u308b\u3082\u306e\u3082\u3088\u304f\u4f7f\u3044\u307e\u3059\u3088\u306d\u3002<\/p>\n<p>String\u3084<span>Integer<\/span>\u306a\u3069\u3067\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u4e0a\u624b\u304f\u4f7f\u3044\u5206\u3051\u3055\u308c\u3066\u3044\u307e\u3059\u3002<span>String<\/span>\u3084<span>Integer<\/span>\u306f\u305d\u308c\u305e\u308c\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u81ea\u5206\u81ea\u8eab\u306e\u6587\u5b57\u5217\u3084\u6570\u5024\u3092\u6301\u3064\u4e00\u65b9\u3067\u3001<span>String<\/span>\u3084<span>Integer<\/span>\u306b\u95a2\u3059\u308b\u5171\u901a\u7684\u306a\u51e6\u7406\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h4>\uff15-\uff11-\uff11\uff0e\u4f8b\uff1a<span>String.substring()<\/span>\u3068<span>String.valueOf()<\/span><\/h4>\n<p>\u4f8b\u3048\u3070\u3001<span>String<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">public String substring(int beginIndex, int endIndex)\r\npublic static String valueOf(int i)<\/pre>\n<p>substring\u306f<span>String<\/span>\u81ea\u3089\u304c\u6301\u3064\u6587\u5b57\u5217\u304b\u3089\u5207\u308a\u51fa\u3057\u307e\u3059\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u304c\u3075\u3055\u308f\u3057\u3044\u3067\u3059\u3002<span>SQL<\/span>\u306a\u3069\u3067\u306f<span>substring(<\/span>\u6587\u5b57\u5217<span>, <\/span>\u958b\u59cb\u4f4d\u7f6e<span>, <\/span>\u5207\u308a\u51fa\u3057\u6587\u5b57\u6570<span>)<\/span>\u306a\u3069\u3068\u3057\u307e\u3059\u304c\u3001<span>Java<\/span>\u3067\u306f<span>String<\/span>\u81ea\u8eab\u306b\u300c\u3042\u306a\u305f\u304c\u6301\u3063\u3066\u3044\u308b\u6587\u5b57\u5217\u304b\u3089\u6307\u5b9a\u4f4d\u7f6e\u3092\u5207\u308a\u51fa\u3057\u305f\u3082\u306e\u3092\u304f\u3060\u3055\u3044\u300d\u3068\u983c\u3080\u306e\u3067\u3059\u306d\u3002<\/p>\n<p>\u4e00\u65b9\u3001<span>valueOf<\/span>\u306f<span>int<\/span>\u306b\u5bfe\u5fdc\u3059\u308b<span>String<\/span>\u3092\u5f97\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u306e\u51e6\u7406\u306b\u306f<span>String<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u6301\u3064\u6587\u5b57\u5217\u306f\u95a2\u4fc2\u3042\u308a\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u3001\u4f55\u304b\u306e<span>String<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u300c\u3053\u306e<span>int<\/span>\u306b\u5bfe\u3059\u308b<span>String<\/span>\u3092\u751f\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u300d\u3068\u983c\u3093\u3060\u3068\u3057\u3066\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u81ea\u8eab\u304c\u6301\u3064\u6587\u5b57\u5217\u306f\u7d50\u679c\u306b\u4f55\u3082\u5f71\u97ff\u3057\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>\u3067\u3059\u304b\u3089\u3001<span>String.valueOf(int)<\/span>\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u306a\u304f\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269<span>\u2026<\/span>\u3059\u306a\u308f\u3061<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u306e\u304c\u3075\u3055\u308f\u3057\u3044\u306e\u3067\u3059\u3002<span>int<\/span>\u306b\u5bfe\u3059\u308b<span>String<\/span>\u3092\u751f\u6210\u3059\u308b\u306e\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u95a2\u4fc2\u306e\u306a\u3044\u6c7a\u307e\u308a\u304d\u3063\u305f\u5185\u5bb9\u306e\u51e6\u7406\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n<h4>\uff15-\uff11-\uff12\uff0e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3060\u3068<span>private<\/span>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u660e\u8a00\u3059\u308b<\/h4>\n<p>\u306a\u304a\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u6301\u3064\u30af\u30e9\u30b9\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3057\u3066\u751f\u6210\u3055\u308c\u306a\u304f\u3066\u3082\u6a5f\u80fd\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u3092\u5fb9\u5e95\u3059\u308b\u305f\u3081\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092<span>private<\/span>\u3068\u3057\u3066\u5916\u90e8\u304b\u3089\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3001\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u3067\u3042\u308b\u3053\u3068\u3092\u660e\u78ba\u306b\u793a\u3059\u3053\u3068\u3082\u666e\u901a\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u3068\u3057\u3066\u3001\u5148\u8ff0\u3057\u305f<span>Collections<\/span>\u3084<span>Arrays<\/span>\u306f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c<span>private<\/span>\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3082\u3057<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3070\u304b\u308a\u3067\u3001\u3057\u304b\u3082<span>private<\/span>\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30af\u30e9\u30b9\u3092\u898b\u304b\u3051\u305f\u3089\u3001\u305d\u308c\u306f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30af\u30e9\u30b9\u306a\u306e\u3060\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ Java 10\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3088\u308a\u629c\u7c8b\r\npublic class Arrays {\r\n    :\r\n    private Arrays() {}\r\n    :\r\n\r\npublic class Collections {\r\n    :\r\n    private Collections() {\r\n    }<\/pre>\n<h3><span id=\"-static-5\">\uff15-\uff12\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011<span>static<\/span>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306e\u6d3b\u7528<\/span><\/h3>\n<p>static\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7d44\u307f\u7acb\u3066\u308b\u51e6\u7406\u3092\u4ee3\u884c\u3057\u3001\u7d50\u679c\u3068\u3057\u3066\u7d44\u307f\u7acb\u3066\u6e08\u307f\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\u30e1\u30bd\u30c3\u30c9\u306e\u3053\u3068\u3067\u3059\u3002<span>\u203b<\/span>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u306e<span>Factory Method<\/span>\u3068\u306f\u5185\u5bb9\u304c\u9055\u3044\u307e\u3059\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>new\u3059\u308b\u3060\u3051\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3092\u308f\u3056\u308f\u3056<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067<span>?\u2026<\/span>\u3068\u601d\u308f\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3067\u3059\u304c\u3001\u5b9f\u306f\u69d8\u3005\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7bc0\u3067\u3082\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u304c\u3001\u8a73\u7d30\u3092\u77e5\u308a\u305f\u3044\u65b9\u306f\u3001\u4f8b\u3048\u3070\u66f8\u7c4d\u300c<span>Effective Java<\/span>\u300d\u306a\u3069\u306b\u8a73\u7d30\u304c\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u8aad\u3093\u3067\u307f\u307e\u3057\u3087\u3046<span>!!<\/span><\/p>\n<p>\u306a\u304a\u3001<span>Integer.valueOf(int)<\/span>\u306f<span>static<\/span>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306e\u5074\u9762\u3082\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u5185\u90e8\u306e\u5b9f\u88c5\u3067\u306f<span>Integer<\/span>\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u3066\u3001\u7279\u5b9a\u306e\u7bc4\u56f2\u306e\u6570\u5024\u306b\u5bfe\u3057\u3066\u306f\u3001\u5e38\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u540c\u3058<span>Integer<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u623b\u308b\u306e\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001<span>Java<\/span>\u306e\u5185\u90e8\u3067\u3082<span>static<\/span>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306f\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>\uff15-\uff12-\uff11\uff0e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u5f8c\u306e\u521d\u671f\u5316\u51e6\u7406\u3092\u307e\u3068\u3081\u3066\u5b9f\u884c\u3059\u308b<\/h4>\n<p>\u4f8b\u3068\u3057\u3066\u3001\u666e\u901a\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3046\u5074\u304c<span>new<\/span>\u3057\u3066\u5fc5\u8981\u306a\u51e6\u7406\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u5de5\u7a0b\u304c\u8907\u96d1\u3060\u3068\u30df\u30b9\u304c\u8d77\u304d\u307e\u3059\u306e\u3067\u3001\u305d\u3053\u307e\u3067\u30ef\u30f3\u30bb\u30c3\u30c8\u306b\u3057\u3066\u63d0\u4f9b\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3066\u304b\u3089\u2026\r\nSomeClass x = new SomeClass();\r\n\/\/ \u5ef6\u3005\u3068\u521d\u671f\u5316\u51e6\u7406\u3092\u884c\u3044\u2026\r\nx.setA();\r\nx.setB();\r\nx.setC();\r\nx.initialize();\r\n\r\n\/\/ \u5fc5\u8981\u306a\u51e6\u7406\u3092\u547c\u3073\u51fa\u3057\u5074\u3067\u6f0f\u308c\u306a\u304f\u5168\u3066\u5b9f\u884c\u3057\u7d42\u308f\u3063\u305f\u3089\u3001\u3088\u3046\u3084\u304f\u4f7f\u3048\u308b\u72b6\u614b\u306b\u306a\u308b\r\nx.someProcess();<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8981\u6c42\u3059\u308c\u3070\u3001\u3059\u3050\u4f7f\u3048\u308b!!\r\nSomeClass x = SomeClass.build();\r\nx.someProcess();\r\n\r\n\/\/ SomeClass\u306e\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\r\nclass SomeClass {\r\n\t\/\/ static\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u5fc5\u8981\u306a\u521d\u671f\u5316\u51e6\u7406\u3092\u3059\u3079\u3066\u78ba\u5b9f\u306b\u884c\u3046\r\n\tstatic SomeClass build() {\r\n\t\tSomeClass ret = new SomeClass();\r\n\t\tret.setA();\r\n\t\tret.setB();\r\n\t\tret.setC();\r\n\t\tret.initialize();\r\n\t\treturn ret;\r\n\t}\r\n}<\/pre>\n<h4>\uff15-\uff12-\uff12\uff0e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u51e6\u7406\u306b\u300c\u610f\u5473\u300d\u3092\u4ed8\u4e0e\u3059\u308b<\/h4>\n<p>\u5fdc\u7528\u3068\u3057\u3066\u3001\u610f\u5473\u3084\u6587\u8108\u3092\u3082\u3063\u3066\u7528\u9014\u306b\u5fdc\u3058\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3055\u305b\u308b\u306e\u306b\u3082\u4f7f\u3048\u307e\u3059\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u3001\u30e1\u30bd\u30c3\u30c9\u540d\u3067\u4f55\u3092\u76ee\u7684\u306b\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u623b\u3059\u306e\u304b\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u4f7f\u3046\u5074\u304c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092<span>new<\/span>\u3057\u3066\u5fc5\u8981\u306a\u8a2d\u5b9a\u3092\u3059\u308b\u3088\u308a\u3082\u305a\u3063\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>\u305d\u308c\u306b\u3001\u30af\u30e9\u30b9\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u305f\u304f\u3055\u3093\u3042\u308b\u5834\u5408\u3001\u305d\u308c\u305e\u308c\u306e<span>Javadoc<\/span>\u3092\u8aad\u307f\u8fbc\u3093\u3067\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u610f\u5473\u3092\u8abf\u3079\u308b\u3088\u308a\u3082\u3001\u30e1\u30bd\u30c3\u30c9\u540d\u3067\u3069\u3093\u306a\u72b6\u614b\u3092\u6301\u3064\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u623b\u3063\u3066\u304f\u308b\u304b\u76f4\u611f\u7684\u306b\u308f\u304b\u308b\u65b9\u304c\u3001\u4f7f\u3046\u5074\u306b\u3068\u3063\u3066\u306f\u3088\u308a\u4f7f\u3044\u3084\u3059\u3044\u3068\u601d\u3044\u307e\u305b\u3093\u304b<span>?<\/span><\/p>\n<pre class=\"prettyprint lang:default decode:true\">class SomeClass {\r\n\tstatic SomeClass buildX() {\r\n\t\t\/\/ X\u7528\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7d44\u307f\u7acb\u3066\u3066\u623b\u3059\r\n\t}\r\n\r\n\tstatic SomeClass buildY() {\r\n\t\t\/\/ Y\u7528\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7d44\u307f\u7acb\u3066\u3066\u623b\u3059\r\n\t}\r\n\r\n\tstatic SomeClass buildZ() {\r\n\t\t\/\/ Z\u7528\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7d44\u307f\u7acb\u3066\u3066\u623b\u3059\r\n\t}\r\n}<\/pre>\n<h4>\uff15-\uff12-\uff13\uff0e\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u610f\u8b58\u3055\u305b\u306a\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210<\/h4>\n<p>\u3055\u3089\u306b\u3001\u4e0a\u624b\u306b\u30af\u30e9\u30b9\u8a2d\u8a08\u304c\u3067\u304d\u3066\u3044\u308c\u3070\u3001\u56fa\u6709\u306e\u5b9f\u88c5\u306f\u30b5\u30d6\u30af\u30e9\u30b9\u3067\u884c\u3063\u305f\u4e0a\u3067\u3001<span>static<\/span>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u7528\u3044\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u30af\u30e9\u30b9\u3092\u610f\u8b58\u3055\u305b\u306a\u3044\u3067\u6e08\u307e\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u3060\u3068\u3001\u4f7f\u3046\u5074\u306f\u3069\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u3079\u304d\u304b\u3092\u77e5\u3089\u306a\u304f\u3066\u3082\u3001\u3069\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u305b\u3070\u3044\u3044\u306e\u304b\u77e5\u3063\u3066\u304a\u304f\u3060\u3051\u3067\u3044\u3044\u306e\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class SomeClass {} \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5b9f\u88c5\r\nclass SomeClassX extends SomeClass {} \/\/ X\u7528\u306e\u30b5\u30d6\u30af\u30e9\u30b9\r\nclass SomeClassY extends SomeClass {} \/\/ Y\u7528\u306e\u30b5\u30d6\u30af\u30e9\u30b9\r\nclass SomeClassZ extends SomeClass {} \/\/ Z\u7528\u306e\u30b5\u30d6\u30af\u30e9\u30b9\r\n\r\nclass SomeClassBuilder {\r\n\t\/\/ \u7528\u9014\u306b\u5fdc\u3058\u3066\u547c\u3073\u51fa\u3059static\u30e1\u30bd\u30c3\u30c9\u3092\u5909\u3048\u308b\u2192\u5177\u4f53\u7684\u306a\u30b5\u30d6\u30af\u30e9\u30b9\u540d\u3092\u77e5\u3089\u306a\u304f\u3066\u3082\u3044\u3044\r\n\tstatic SomeClass buildX() {\r\n\t\treturn new SomeClassX();\r\n\t}\r\n\r\n\tstatic SomeClass buildY() {\r\n\t\treturn new SomeClassY();\r\n\t}\r\n\r\n\tstatic SomeClass buildZ() {\r\n\t\treturn new SomeClassZ();\r\n\t}\r\n\r\n\t\/\/ \u3042\u308b\u3044\u306f\u3001\u6761\u4ef6\u306b\u5fdc\u3058\u3066\u751f\u6210\u3059\u308b\u30af\u30e9\u30b9\u3092static\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u9078\u3076\r\n\t\/\/ \u4f7f\u3046\u5074\u306fSomeClass\u3068\u3057\u3066\u4f7f\u3048\u308c\u3070\u3001\u3069\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3042\u308d\u3046\u3068\u95a2\u4fc2\u306a\u3044\u306f\u305a\r\n\tstatic SomeClass build(\u6b32\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6761\u4ef6\u3092\u8868\u3059\u5f15\u6570) {\r\n\t\tif (...) {\r\n\t\t\treturn new SomeClassX();\r\n\t\t} else if (...) {\r\n\t\t\treturn new SomeClassY();\r\n\t\t} else if (...) {\r\n\t\t\treturn new SomeClassZ();\r\n\t\t} else {\r\n\t\t\treturn new SomeClass();\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-Singleton\">\uff15-\uff13\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011<span>Singleton<\/span>\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u5229\u7528<\/span><\/h3>\n<p>static\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u306e\u4e00\u3064\u3068\u3057\u3066\u3001\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\u3067\u304d\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>\u30e1\u30bd\u30c3\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 StaticMethodSample {\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 StaticMethodSample 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 StaticMethodSample() {\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 StaticMethodSample getInstance() {\r\n\t\tif (instance == null) {\r\n\t\t\tinstance = new StaticMethodSample();\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<h2><span id=\"static-2\">\uff16\uff0e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9<\/span><\/h2>\n<p>Java 8\u304b\u3089\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306b<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001<span>Java 9<\/span>\u304b\u3089\u306f\u305d\u308c\u3092<span>private<\/span>\u306b\u3082\u3067\u304d\u307e\u3059\u3002\u3067\u3059\u304b\u3089\u3001\u305d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306b\u95a2\u9023\u3059\u308b\u51e6\u7406\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u81ea\u8eab\u306b\u5ba3\u8a00\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<span>default<\/span>\u30e1\u30bd\u30c3\u30c9\u3068\u4f75\u305b\u3066\u3001\u4f7f\u3044\u3088\u3046\u306b\u3088\u3063\u3066\u306f\u3068\u3066\u3082\u4fbf\u5229\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">interface StaticMethodInterface {\r\n\tvoid instanceMethod(); \/\/ \u666e\u901a\u306e\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9(\u6697\u9ed9\u7684\u306bpublic abstract\u3068\u306a\u308b)\r\n\r\n\t\/* private void privateInstanceMethod(); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! \u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u306fprivate\u3068\u306f\u3067\u304d\u306a\u3044!! *\/\r\n\r\n\t\/\/ \u30af\u30e9\u30b9\u306estatic\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u69d8\u306b\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306b\u3082\u5ba3\u8a00\u3067\u304d\u308b!!\r\n\tstatic void staticMethod() {\r\n\t\tSystem.out.println(\"static method in interface!!\");\r\n\t\tprivateStaticMethod(); \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306eprivate\u306astatic\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u307f\u308b\r\n\t}\r\n\r\n\t\/\/ static\u30e1\u30bd\u30c3\u30c9\u306fprivate\u306b\u3082\u3067\u304d\u308b!! (Java 9\u304b\u3089)\r\n\tprivate static void privateStaticMethod() {\r\n\t\tSystem.out.println(\"private static method in interface!!\");\r\n\t}\r\n}<\/pre>\n<p>\u3067\u3059\u304b\u3089\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5916\u90e8\u304b\u3089\u3082\u76f4\u63a5\u547c\u3073\u51fa\u305b\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u304b\u3089\u3082\u547c\u3073\u51fa\u305b\u307e\u3059\u304c\u3001\u5b9f\u88c5\u30af\u30e9\u30b9\u304b\u3089\u306f\u76f4\u63a5\u547c\u3073\u51fa\u305b\u305a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u540d\u3092\u7d4c\u7531\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u304c\u7389\u306b\u7455\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample13 {\r\n\tpublic static void main(String[] args) {\r\n\t\tStaticMethodInterface.staticMethod(); \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306estatic\u30e1\u30bd\u30c3\u30c9\u3092\u76f4\u63a5\u547c\u3073\u51fa\u3059\r\n\t\t\/* StaticMethodInterface.privateStaticMethod(); \/\/ private\u306a\u3082\u306e\u306f\u547c\u3073\u51fa\u305b\u306a\u3044 *\/\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class StaticMethodSample14 implements StaticMethodInterface {\r\n\t@Override\r\n\tpublic void instanceMethod() {\r\n\t\tStaticMethodInterface.staticMethod(); \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306estatic\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\r\n\t}\r\n}<\/pre>\n<p>\u3053\u308c\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u306e\u306f\u3001<span>Java 8<\/span>\u3067\u5c0e\u5165\u3055\u308c\u305f\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3084\u30e9\u30e0\u30c0\u5f0f\u306b\u3082\u95a2\u4fc2\u304c\u3042\u308a\u307e\u3059\u3002\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306f\u4f55\u304b\u306e\u300c\u6a5f\u80fd\u300d\u3092\u8868\u73fe\u3057\u305f\u3082\u306e\u3067\u3059\u304c\u3001\u305d\u308c\u3092\u6d3b\u7528\u30fb\u5fdc\u7528\u3057\u305f\u5171\u901a\u7684\u30fb\u6c4e\u7528\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u5ba3\u8a00\u3055\u308c\u308b\u3079\u304d\u5834\u6240\u306f\u3001\u3084\u306f\u308a\u305d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u81ea\u8eab\u304c\u3075\u3055\u308f\u3057\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>Java 7\u307e\u3067\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306b\u306f\u5b9f\u88c5\u3092\u6301\u3066\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u6d3b\u7528\u3059\u308b\u306b\u306f\u5225\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u7684\u306a\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3067\u3057\u305f\u3002\u4f8b\u3048\u3070\u3001Collection\u306b\u5bfe\u3059\u308bCollections\u3067\u3059\u306d\u3002\u3067\u3082\u3001\u3053\u306e\u3088\u3046\u306b\u5206\u304b\u308c\u3066\u3044\u308b\u3068\u3001Collection\u3068Collections\u306e\u4e21\u65b9\u3092\u899a\u3048\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\u3057\u3001Collections\u81ea\u4f53\u304c\u3069\u3093\u3069\u3093\u80a5\u5927\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u305d\u308c\u3060\u3068\u4f5c\u308b\u65b9\u3082\u4f7f\u3046\u65b9\u3082\u5927\u5909\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>Java 8\u4ee5\u964d\u3067\u306e\u6a19\u6e96<span>API<\/span>\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u81ea\u8eab\u304c\u6301\u3064<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u5927\u91cf\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002\u4fbf\u5229\u306a\u3082\u306e\u3082\u591a\u3044\u306e\u3067\u3001\u3069\u3093\u3069\u3093\u4f7f\u3063\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2><span id=\"static-3\">\uff17\uff0e\u3010\u4e2d\u7d1a\u8005\u5411\u3051\u3011<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\u306e\u8003\u3048\u65b9\u4f8b<\/span><\/h2>\n<p>static\u30e1\u30bd\u30c3\u30c9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\u306e\u8003\u3048\u65b9\u306f\u826f\u304f\u8b70\u8ad6\u3068\u306a\u308a\u307e\u3059\u3002\u500b\u3005\u306e\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u7d4c\u9a13\u3084\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3078\u306e\u59ff\u52e2\u306e\u9055\u3044\u3067\u610f\u898b\u304c\u5206\u304b\u308c\u307e\u3059\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u7406\u7531\u306b\u306f\u7d0d\u5f97\u611f\u304c\u3042\u308b\u306e\u3067\u3001\u4e2d\u3005\u5408\u610f\u306f\u3055\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u304b\u3089\u3082\u5168\u54e1\u304c\u5408\u610f\u3067\u304d\u308b\u3082\u306e\u306f\u51fa\u3066\u6765\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3067\u3059\u306e\u3067\u3001\u3053\u3053\u3067\u306f\u3042\u304f\u307e\u3067\u79c1\u898b\u3092\u8ff0\u3079\u307e\u3059\u3002\u7686\u3055\u3093\u3082\u81ea\u5206\u306e\u8003\u3048\u3092\u6301\u3063\u3066\u307f\u3066\u3001\u5468\u56f2\u306e\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u3068\u610f\u898b\u3092\u4ea4\u308f\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>public\u306a\u30e1\u30bd\u30c3\u30c9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u539f\u5247\u3068\u3059\u308b\u306e\u304c\u3001<span>Java<\/span>\u3067\u306f\u81ea\u7136\u3060\u3068\u611f\u3058\u307e\u3059\u3002<span>Java<\/span>\u3067\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u72b6\u614b\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u8868\u73fe\u3059\u308b\u306e\u304c\u81ea\u7136\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u304c\u6570\u591a\u304f\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u76f8\u4e92\u4f5c\u7528\u3067\u8868\u73fe\u3055\u308c\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u308c\u306b\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u51e6\u7406\u306e\u672c\u7b4b\u304b\u3089\u5c11\u3057\u96e2\u308c\u305f\u3082\u306e<span>\u2026<\/span>\u3068\u306e\u611f\u899a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306b\u300c\u3057\u3066\u3082\u3088\u3044\u300d\u3068\u611f\u3058\u308b\u306e\u306f\u3001<span>private<\/span>\u306a\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u306e\u5171\u901a\u7684\u306a\u51e6\u7406\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u72b6\u614b\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3082\u306e\u3067\u3059\u3002<span>private<\/span>\u306a\u306e\u3067<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u30af\u30e9\u30b9\u5916\u90e8\u3078\u306e\u5f71\u97ff\u306f\u306a\u304f\u3001<span>static<\/span>\u306a\u306e\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u4f9d\u5b58\u3057\u306a\u3044\u51e6\u7406\u3060\u3068\u660e\u793a\u3067\u304d\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306b\u300c\u3059\u3079\u304d\u300d\u3068\u611f\u3058\u308b\u306e\u306f\u3001\u5f15\u6570\u3068<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3060\u3051\u3067\u5b8c\u7d50\u3059\u308b\u51e6\u7406\u3067\u3001\u304b\u3064\u30af\u30e9\u30b9\u5185\u5916\u3067\u983b\u7e41\u306b\u4f7f\u3046\u6c7a\u307e\u308a\u304d\u3063\u305f\u5185\u5bb9\u306e\u51e6\u7406\u3067\u3059\u3002\u3044\u308f\u3086\u308b\u300c\u95a2\u6570\u300d\u3084\u300c\u30d7\u30ed\u30b7\u30fc\u30b8\u30e3\u300d\u7684\u306a\u3082\u306e\u3067\u3059\u3002\u4f55\u304b\u306e\u6c7a\u307e\u308a\u304d\u3063\u305f\u51e6\u7406\u306e\u305f\u3081\u306b\u4f55\u306e\u72b6\u614b\u3082\u6301\u305f\u306a\u3044\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3066\u90fd\u5ea6\u4f7f\u3044\u6368\u3066\u308b\u306e\u306f\u3001\u30e1\u30e2\u30ea\u3084<span>CPU<\/span>\u6642\u9593\u306e\u7121\u99c4\u3060\u3068\u611f\u3058\u307e\u3059\u3002<\/p>\n<h2><span id=\"i-2\">\uff18\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>\u4ee5\u4e0a\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u8aac\u660e\u3092\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u30e1\u30bd\u30c3\u30c9\u3092<span>static<\/span>\u3068\u3059\u308b\u3053\u3068\u3067\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u306b\u306a\u308a\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306f\u95a2\u4fc2\u306e\u306a\u3044\u6587\u8108\u3067\u3044\u3064\u3067\u3082\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>static\u30e1\u30bd\u30c3\u30c9\u306f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u7684\u306b\u3082\u4f7f\u3048\u307e\u3059\u3057\u3001\u69d8\u3005\u306a\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u3082\u91cd\u8981\u306a\u5f79\u5272\u3092\u6301\u3064\u3082\u306e\u3067\u3059\u3002\u3067\u3082\u3001\u3080\u3084\u307f\u3084\u305f\u3089\u3068\u4f7f\u3046\u3068\u8aad\u307f\u3065\u3089\u304f\u3001\u4f7f\u3044\u3065\u3089\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u4f7f\u3044\u5206\u3051\u306f\u3088\u304f\u3088\u304f\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u30e1\u30bd\u30c3\u30c9\u3092\u30af\u30e9\u30b9\u306e\u6301\u3061\u7269\u306b\u3059\u308b<span>\u2026<\/span>\u3068\u3044\u3046\u3060\u3051\u3067\u306f\u30d4\u30f3\u3068\u3053\u306a\u304b\u3063\u305f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306e\u6d3b\u7528\u4f8b\u3092\u901a\u3058\u3066<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u3053\u3093\u306a\u98a8\u306b\u4f7f\u3048\u308b\u3093\u3060\u3001\u3068\u611f\u3058\u3066\u3044\u305f\u3060\u3051\u305f\u306a\u3089\u5e78\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306e\u30af\u30e9\u30b9\u304c\u6301\u3066\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u6240\u6709\u8005\u306e\u9055\u3044\u306e\u89b3\u70b9\u304b\u3089\u3059\u308b\u3068\u4e8c\u7a2e\u985e\u3042\u308a\u307e\u3059\u3002static\u4fee\u98fe\u5b50\u3092\u9069\u7528\u3057\u305fstatic\u30e1\u30bd\u30c3\u30c9\u3068\u3001static\u3067\u306f\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u3001\u3059\u306a\u308f\u3061\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002 static [&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\/888"}],"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=888"}],"version-history":[{"count":8,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/888\/revisions"}],"predecessor-version":[{"id":5692,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/888\/revisions\/5692"}],"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=888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}