{"id":1587,"date":"2019-04-15T12:00:29","date_gmt":"2019-04-15T03:00:29","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=1587"},"modified":"2025-10-06T17:31:57","modified_gmt":"2025-10-06T08:31:57","slug":"java-main","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/java-main","title":{"rendered":"Java\u306emain\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u51e6\u7406\u5b9f\u884c\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3068\u306a\u308bmain\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u89e3\u8aac"},"content":{"rendered":"<p><strong>Java\u306emain\u30e1\u30bd\u30c3\u30c9\u306fJava\u3067\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u6642\u306e\u5165\u308a\u53e3\u3068\u306a\u308b\u3082\u306e\u3067\u3001\u3044\u308f\u3086\u308b\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002main\u30e1\u30bd\u30c3\u30c9\u306b\u66f8\u304b\u308c\u305f\u51e6\u7406\u304b\u3089Java\u306e\u5b9f\u884c\u304c\u59cb\u307e\u308a\u307e\u3059\u3002<\/strong><\/p>\n<p>main\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u3046\u3044\u3046\u3082\u306e\u304b\u306f\u3001<span>Java<\/span>\u306e\u4ed5\u69d8\u3067\u4fee\u98fe\u5b50\u3084\u540d\u524d\u3001\u5f15\u6570\u304c\u30ac\u30c3\u30c1\u30ea\u6c7a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u3067\u3082\u3001\u666e\u901a\u306e\u30e1\u30bd\u30c3\u30c9\u3042\u308b\u3053\u3068\u306b\u5909\u308f\u308a\u306f\u306a\u304f\u3001\u5358\u306b<span>Java<\/span>\u3092\u4f7f\u3046\u6642\u306e\u7d04\u675f\u4e8b\u306b\u904e\u304e\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001<span>Java<\/span>\u3092\u5b66\u3073\u59cb\u3081\u308b\u4e00\u756a\u6700\u521d\u306b\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f<span>Java<\/span>\u3092\u52d5\u304b\u3059\u305f\u3081\u306e\u300c\u304a\u307e\u3058\u306a\u3044\u300d\u3060\u3068\u8aac\u660e\u3055\u308c\u305f\u65b9\u306f\u591a\u3044\u3067\u3057\u3087\u3046\u3002\u3067\u3082\u3001\u3082\u3046\u5c11\u3057\u6df1\u304f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u7406\u89e3\u3057\u3066\u3001\u304a\u307e\u3058\u306a\u3044\u306e\u72b6\u614b\u304b\u3089\u4e00\u6b69\u5148\u306b\u9032\u3093\u3067\u307f\u307e\u305b\u3093\u304b<span>?<\/span><\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<strong><\/strong><span class=\"f-marker-p\"><strong>Java\u306emain\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3088\u308a\u5e83\u304f\u6df1\u3044\u77e5\u8b58\u304c\u5f97\u3089\u308c\u308b\u3088\u3046<\/strong><\/span>\u3001\u521d\u5fc3\u8005\u5411\u3051\u306b\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u203b\u3053\u306e\u8a18\u4e8b\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001<span>Java 12<\/span>\u306e\u74b0\u5883\u3067\u52d5\u4f5c\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Javamain\">\uff11\uff0eJava\u306emain\u30e1\u30bd\u30c3\u30c9\u5165\u9580<\/a><ul><li><a href=\"#-mainJava\">\uff11-\uff11\uff0emain\u30e1\u30bd\u30c3\u30c9\u306fJava\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8<\/a><\/li><li><a href=\"#-main5\">\uff11-\uff12\uff0emain\u30e1\u30bd\u30c3\u30c9\u306e5\u3064\u306e\u30eb\u30fc\u30eb<\/a><\/li><li><a href=\"#-Javamain\">\uff11-\uff13\uff0eJava\u306fmain\u30e1\u30bd\u30c3\u30c9\u3092\u63a2\u3057\u3066\u5b9f\u884c\u3059\u308b<\/a><\/li><li><a href=\"#-String\">\uff11-\uff14\uff0e\u5f15\u6570\u306eString\u914d\u5217\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5165\u308b<\/a><\/li><li><a href=\"#-main\">\uff11-\uff15\uff0emain\u30e1\u30bd\u30c3\u30c9\u306e\u7d42\u308f\u3089\u305b\u65b9<\/a><\/li><\/ul><\/li><li><a href=\"#8221public_static_void_mainString8221\">\uff12\uff0e\u3010\u767a\u5c55\u3011\u306a\u305c&#8221;public static void main(String[])&#8221;\u306a\u306e\u304b?<\/a><ul><li><a href=\"#-public\">\uff12-\uff11\uff0e\u306a\u305cpublic\u306a\u306e\u304b?<\/a><\/li><li><a href=\"#-static\">\uff12-\uff12\uff0e\u306a\u305cstatic\u306a\u306e\u304b?<\/a><\/li><li><a href=\"#-void\">\uff12-\uff13\uff0e\u306a\u305cvoid\u306a\u306e\u304b?<\/a><\/li><li><a href=\"#-8220main8221\">\uff12-\uff14\uff0e\u306a\u305c&#8220;main&#8221;\u306a\u306e\u304b?<\/a><\/li><li><a href=\"#-String-2\">\uff12-\uff15\uff0e\u306a\u305c\u5f15\u6570\u306fString[]\u3060\u3051\u306a\u306e\u304b?<\/a><\/li><\/ul><\/li><li><a href=\"#i\">\uff13\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Javamain\">\uff11\uff0eJava\u306e<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u5165\u9580<\/span><\/h2>\n<h3><span id=\"-mainJava\">\uff11-\uff11\uff0emain\u30e1\u30bd\u30c3\u30c9\u306f<span>Java<\/span>\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8<\/span><\/h3>\n<p>\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u304c\u3069\u3053\u304b\u3089\u30fb\u3069\u306e\u3088\u3046\u306b\u59cb\u307e\u308b\u304b\u306f\u3001\u5927\u304d\u304f\u4ee5\u4e0b\u306e\u4e8c\u7a2e\u985e\u306b\u5206\u304b\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u4ed5\u69d8\u3067\u6c7a\u3081\u3089\u308c\u305f\u95a2\u6570\u30fb\u30d7\u30ed\u30b7\u30fc\u30b8\u30e3\u30fb\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u59cb\u307e\u308b<\/strong><\/li>\n<li><strong>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5148\u982d\u884c\u304b\u3089\u6700\u5f8c\u306e\u884c\u307e\u3067\u3001\u9806\u756a\u306b\u5b9f\u884c\u3055\u308c\u3066\u3044\u304f<\/strong><\/li>\n<\/ol>\n<p>Java\u306f\u3001<span>1.<\/span>\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3059\u3002<span>1.<\/span>\u306e\u4ef2\u9593\u3068\u3057\u3066\u3001<span>C<\/span>\u8a00\u8a9e\u3001<span>C#<\/span>\u3001<span>Go<\/span>\u3001<span>Kotlin<\/span>\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<span>2.<\/span>\u306f\u30b9\u30af\u30ea\u30d7\u30c8\u7cfb\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u304c\u591a\u304f\u3001<span>Perl<\/span>\u3001<span>Python<\/span>\u3001<span>Ruby<\/span>\u3001<span>PHP<\/span>\u3001\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u306a\u3069\u304c\u305d\u306e\u4ef2\u9593\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u4ed5\u69d8\u3067\u6c7a\u3081\u3089\u308c\u305f\u95a2\u6570\u30fb\u30d7\u30ed\u30b7\u30fc\u30b8\u30e3\u30fb\u30e1\u30bd\u30c3\u30c9\u3092\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8<span>(entry point)<\/span>\u3068\u3082\u547c\u3073\u3001\u53d6\u308a\u5f97\u308b\u540d\u524d\u3084\u5f15\u6570\u3001\u4fee\u98fe\u5b50\u306a\u3069\u304c\u6c7a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001<span>Java<\/span>\u3067\u306f\u300c<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u300d\u304c\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u3069\u3046\u3044\u3046\u5f62\u5f0f\u306e\u3082\u306e\u304b\u304c\u3001<span>Java<\/span>\u306e\u4ed5\u69d8\u3067\u304d\u3061\u3093\u3068\u6c7a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><span id=\"-main5\">\uff11-\uff12\uff0emain\u30e1\u30bd\u30c3\u30c9\u306e<span>5<\/span>\u3064\u306e\u30eb\u30fc\u30eb<\/span><\/h3>\n<p>Java\u306e<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4ee5\u4e0b\u306e\u6761\u4ef6\u3092\u3059\u3079\u3066\u6e80\u305f\u3057\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306fpublic\u3067\u3042\u308b<\/strong><\/li>\n<li><strong>static\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b<\/strong><\/li>\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306fvoid\u3067\u3042\u308b<\/strong><\/li>\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u540d\u306f&#8221;main&#8221;\u3067\u3042\u308b(\u3059\u3079\u3066\u5c0f\u6587\u5b57)<\/strong><\/li>\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306f\u3001String\u306e\u914d\u5217(\u3042\u308b\u3044\u306fString\u306e\u53ef\u5909\u9577\u5f15\u6570)&#8221;\u306e\u307f&#8221;\u3067\u3042\u308b \u203b\u5f15\u6570\u306e\u5909\u6570\u540d\u306f\u4f55\u3067\u3082\u3088\u3044<\/strong><\/li>\n<\/ul>\n<p>\u305d\u3057\u3066\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u6761\u4ef6\u3068\u306f\u5225\u306e\u3053\u3068\u3067\u3059\u304c\u3001<span>Java<\/span>\u3067\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5fc5\u305a\u4f55\u304b\u306e\u30af\u30e9\u30b9\u306a\u3069\u306b\u5c5e\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3067\u3059\u304b\u3089\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u30af\u30e9\u30b9\u306f\u3001\u666e\u901a\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u306b\u306a\u308a\u307e\u3059\u3002\u3082\u3046\u898b\u6163\u308c\u3066\u3044\u308b\u65b9\u3082\u591a\u3044\u3067\u3059\u3088\u306d\u3002\u3061\u306a\u307f\u306b\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u3068\u3057\u3066\u826f\u304f\u4f7f\u308f\u308c\u308b\u5909\u6570\u540d\u306e<span>&#8220;args&#8221;<\/span>\u306f\u3001\u5f15\u6570\u3092\u610f\u5473\u3059\u308b\u82f1\u5358\u8a9e<span>arguments<\/span>\u3092\u77ed\u304f\u7701\u7565\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ Java\u306emain\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u5f62\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ ...\u4f55\u304b\u306e\u51e6\u7406\u304c\u3042\u308b\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u3053\u308c\u3067\u3082main\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306fOK\r\n\t\/\/ \u5f15\u6570\u3092String\u306e\u53ef\u5909\u9577\u5f15\u6570\u3068\u3057\u3066\u3001\u5909\u6570\u540d\u3082\u666e\u901a\u306e\u3082\u306e\u3068\u306f\u5909\u3048\u3066\u3044\u308b\r\n\tpublic static void main(String... hikisu) {\r\n\t\t\/\/ ...\u4f55\u304b\u306e\u51e6\u7406\u304c\u3042\u308b\r\n\t}\r\n}<\/pre>\n<p>\u306a\u304a\u3001\u524d\u8ff0\u3057\u305f\u4ee5\u5916\u306e\u3082\u306e\u3001\u4f8b\u3048\u3070<span>final<\/span>\u3084<span>synchronized<\/span>\u3067\u3042\u3063\u305f\u308a\u3001<span>throws<\/span>\u304c<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u3042\u3063\u3066\u3082\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306e\u6761\u4ef6\u306b\u306f\u5b9f\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u3055\u3089\u306b\u3053\u308c\u3067\u3082\u3001main\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306fOK\r\n\t\/\/ public\u3067static\u3067\u623b\u308a\u5024\u304cvoid\u3001main\u3068\u3044\u3046\u540d\u524d\u3067\u5f15\u6570\u304cString[]\u3060\u3051\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308c\u3070\u3044\u3044\r\n\t@SuppressWarnings(\"unchecked\")\r\n\tpublic final synchronized strictfp static void main(String[] args) throws Exception {\r\n\t\t\/\/ ...\u4f55\u304b\u306e\u51e6\u7406\u304c\u3042\u308b\r\n\t}\r\n}<\/pre>\n<p>\u3082\u3057\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u5225\u306e\u5f15\u6570\u3092\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u3067\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3044\u3066\u3082\u3001\u5b9f\u884c\u6642\u306b\u306f\u5f15\u6570\u304c<span>String[]<\/span>\u306e\u65b9\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u3053\u3061\u3089\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"main method(String[]).\");\r\n\t}\r\n\r\n\t\/\/ \u3053\u3061\u3089\u306f\u547c\u3073\u51fa\u3055\u308c\u306a\u3044\r\n\tpublic static void main(Object[] args) {\r\n\t\tSystem.out.println(\"main method(Object[]).\");\r\n\t}\r\n}<\/pre>\n<h4>\uff11-\uff12-\uff11\uff0emain\u30e1\u30bd\u30c3\u30c9\u306e\u6761\u4ef6\u306f\u3057\u3063\u304b\u308a\u3068\u30c1\u30a7\u30c3\u30af\u3055\u308c\u308b<\/h4>\n<p>\u5148\u306b\u304a\u4f1d\u3048\u3057\u305f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u6761\u4ef6\u306f\u3001<span>Java<\/span>\u306e\u5b9f\u884c\u6642\u306b\u304d\u3063\u3061\u308a\u30c1\u30a7\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u306f<span>Java<\/span>\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306f\u6587\u6cd5\u3069\u304a\u308a\u306a\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u3067\u304d\u307e\u3059\u304c\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u306f\u8a8d\u8b58\u3055\u308c\u307e\u305b\u3093\u3088\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u304cpublic\u3067\u306f\u306a\u3044\r\n\tstatic void main(String[] args) {\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u30e1\u30bd\u30c3\u30c9\u304cstatic\u3067\u306f\u306a\u3044\r\n\tpublic void main(String[] args) {\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304cvoid\u3067\u306f\u306a\u3044\r\n\tpublic static int main(String[] args) {\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u30e1\u30bd\u30c3\u30c9\u540d\u304c\"main\"\u3067\u306f\u306a\u3044(\"main\" != \"Main\")\r\n\tpublic static void Main(String[] args) {\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u5f15\u6570\u304cString\u306e\u914d\u5217\u3067\u306f\u306a\u3044\r\n\tpublic static void main(String args) {\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u5f15\u6570\u304cString\u306e\u914d\u5217\u3060\u3051\u3067\u306f\u306a\u3044(int\u304c\u4f59\u5206)\r\n\tpublic static void main(String[] args, int intValue) {\r\n\t}\r\n}<\/pre>\n<h4>\uff11-\uff12-\uff12\uff0e\u3010\u53c2\u8003\u3011<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u666e\u901a\u306e\u30af\u30e9\u30b9\u306b\u306a\u304f\u3066\u3082\u3044\u3044<\/h4>\n<p>main\u30e1\u30bd\u30c3\u30c9\u304c\u5c5e\u3059\u308b\u5148\u304c\u666e\u901a\u306e\u30af\u30e9\u30b9<span>(class)<\/span>\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3068\u306f\u3001\u5b9f\u306f<span>Java<\/span>\u306e\u4ed5\u69d8\u306e\u3069\u3053\u306b\u3082\u66f8\u3044\u3066\u306f\u3042\u308a\u307e\u305b\u3093\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u5fc5\u8981\u306a\u306e\u306f\u3001<span>public static void main(String[])<\/span>\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u3053\u3068\u3060\u3051\u3067\u3059\u3002<\/p>\n<p>\u3067\u3059\u306e\u3067\u3001\u8a66\u3057\u306b\u62bd\u8c61\u30af\u30e9\u30b9\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3001<span>Enum<\/span>\u306b<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u305f\u305b\u3066\u307f\u3066\u3082\u3001\u5b9f\u306f\u3061\u3083\u3093\u3068\u52d5\u304b\u305b\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3067\u3059\u306e\u3067\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e<span>5<\/span>\u3064\u306e\u6761\u4ef6\u306f\u3001\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3068\u3057\u3066\u306e\u5358\u306a\u308b\u7d04\u675f\u4e8b\u306b\u904e\u304e\u306a\u3044\u306e\u3060\u3068\u3001\u304a\u5206\u304b\u308a\u3044\u305f\u3060\u3051\u308b\u3067\u3057\u3087\u3046\u304b<span>?<\/span><\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u62bd\u8c61\u30af\u30e9\u30b9\u3067\u3082\u3044\u3044\u3057\u3001\r\nabstract class MainAbstractClass {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"\u62bd\u8c61\u30af\u30e9\u30b9\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u3082\u3044\u3044\u3057\u3001\r\n\/\/ Java 8\u4ee5\u964d\r\ninterface MainInterface {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ Enum\u3067\u3082\u3044\u3044!!\r\nenum MainEnum {\r\n\tDUMMY;\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"Enum\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java MainAbstractClass\r\n\u62bd\u8c61\u30af\u30e9\u30b9\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059\r\n\r\nC:\\&gt;java MainInterface\r\n\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059\r\n\r\nC:\\&gt;java MainEnum\r\nEnum\u306emain\u30e1\u30bd\u30c3\u30c9\u3067\u3059<\/pre>\n<h3><span id=\"-Javamain\">\uff11-\uff13\uff0eJava\u306f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u63a2\u3057\u3066\u5b9f\u884c\u3059\u308b<\/span><\/h3>\n<p>Java\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u6642\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9f\u884c\u3059\u308b\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3059\u308b\u3068\u3001\u6307\u5b9a\u3055\u308c\u305f\u30af\u30e9\u30b9\u306b<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u304b\u3092<span>Java<\/span>\u304c\u8abf\u3079\u3066\u3001\u3042\u308c\u3070\u305d\u3053\u304b\u3089\u5b9f\u884c\u3092\u59cb\u3081\u307e\u3059\u3002\u3053\u308c\u306f\u3001<span>Eclipse<\/span>\u306e\u3088\u3046\u306a\u7d71\u5408\u958b\u767a\u74b0\u5883\u3067\u5b9f\u884c\u3059\u308b\u6642\u3082\u3001\u88cf\u3067\u3084\u3063\u3066\u3044\u308b\u3053\u3068\u306f\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">java Main<\/pre>\n<p>\u305d\u3057\u3066\u3001\u6307\u5b9a\u3055\u308c\u305f\u30af\u30e9\u30b9\u306b<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3051\u308c\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3057\u307e\u3044\u307e\u3059\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3044<span>(Main method not found)<\/span>\u3068\u8a00\u3063\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nError: Main method not found in class Main, please define the main method as:\r\n   public static void main(String[] args)\r\nor a JavaFX application class must extend javafx.application.Application<\/pre>\n<p>\u3053\u308c\u306f\u3001\u4f8b\u3048\u3070<span>jar<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u306b\u3042\u308b\u30af\u30e9\u30b9\u3092\u5b9f\u884c\u3059\u308b\u6642\u3067\u3082\u540c\u3058\u3067\u3059\u3002<span>jar<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u306b\u4ed5\u69d8\u3069\u304a\u308a\u306e<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u5225\u306e\u30af\u30e9\u30b9\u304c\u3042\u3063\u305f\u3068\u3057\u3066\u3082\u3001\u6307\u5b9a\u3057\u305f\u30af\u30e9\u30b9\u306b\u304d\u3061\u3093\u3068\u3057\u305f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u306a\u3051\u308c\u3070\u99c4\u76ee\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-String\">\uff11-\uff14\uff0e\u5f15\u6570\u306e<span>String<\/span>\u914d\u5217\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u5165\u308b<\/span><\/h3>\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u3078\u306f\u51e6\u7406\u306b\u4f7f\u3046\u30d1\u30e9\u30e1\u30fc\u30bf<span>(<\/span>\u30d7\u30ed\u30b0\u30e9\u30e0\u3078\u306e\u5f15\u6570<span>)<\/span>\u3092\u6e21\u3057\u305f\u3044\u3067\u3059\u3088\u306d\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e<span>String<\/span>\u914d\u5217\u306b\u306f\u3001<span>Java<\/span>\u5b9f\u884c\u6642\u306b\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u3067\u6307\u5b9a\u3055\u308c\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6587\u5b57\u5217\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u306f\" + args.length + \"\u3067\u3059\");\r\n\t\tSystem.out.println(java.util.Arrays.toString(args));\r\n\t}\r\n}<\/pre>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u306f\u7a7a\u767d\u3067\u533a\u5207\u3089\u308c\u305f\u5358\u4f4d\u3067<span>String<\/span>\u914d\u5217\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u304c\u3001\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u3067\u304f\u304f\u308b\u3068\u3001\u7a7a\u767d\u306a\u3069\u3082\u307e\u3068\u3081\u3066\u4e00\u3064\u306e\u6587\u5b57\u5217\u306b\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3069\u3046\u3044\u3046\u8a18\u8ff0\u3092\u3059\u308c\u3070\u3044\u3044\u304b\u306f\u3001\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3084<span>Unix<\/span>\u3067\u306e\u30b7\u30a7\u30eb\u306e\u6587\u6cd5\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306e<span>String<\/span>\u914d\u5217\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u304f\u3066\u3082<span>null<\/span>\u306b\u306f\u306a\u3089\u305a\u3001\u9577\u3055<span>0<\/span>\u306e\u914d\u5217\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001\u6570\u5b57\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3057\u3066\u3082\u5168\u3066<span>String<\/span>\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u6570\u5b57\u3068\u3057\u3066\u6271\u3044\u305f\u3044\u306a\u3089\u30d7\u30ed\u30b0\u30e9\u30e0\u5074\u3067\u6570\u5024\u3068\u3057\u3066\u5909\u63db\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\n\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u306f0\u3067\u3059\r\n[]\r\n\r\nC:\\&gt;java Main aaa bbb 123 \"ccc ddd\"\r\n\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u306f4\u3067\u3059\r\n[aaa, bbb, 123, ccc ddd]<\/pre>\n<h4>\uff11-\uff14-\uff11\uff0e\u7279\u5225\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u306f\u8a2d\u5b9a\u3055\u308c\u306a\u3044<\/h4>\n<p>java\u30b3\u30de\u30f3\u30c9<span>(Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3<span>)<\/span>\u5411\u3051\u306e\u7279\u5225\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e<span>String<\/span>\u914d\u5217\u306b\u306f\u8a2d\u5b9a\u3055\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u3089\u306f\u3001<span>java<\/span>\u30b3\u30de\u30f3\u30c9\u3068\u5b9f\u884c\u3059\u308b\u30af\u30e9\u30b9\u540d\u306e\u9593\u3067\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001<span>&#8220;java&#8221;<\/span>\u3068<span>&#8220;Main&#8221;<\/span>\u306e\u9593\u306b\u3042\u308b\u300c<span>-dsa -Dxxx=test -Xmx100m -XX:-Inline<\/span>\u300d\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java -dsa -Dxxx=test -Xmx100m -XX:-Inline Main\r\n\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u306f0\u3067\u3059\r\n[]<\/pre>\n<p>\u305f\u3060\u3057\u3001\u5b9f\u884c\u3059\u308b\u30af\u30e9\u30b9\u540d\u306e\u5f8c\u308d\u306b\u6307\u5b9a\u3057\u305f\u306a\u3089\u30d7\u30ed\u30b0\u30e9\u30e0\u3078\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u304b\u3089\u53c2\u7167\u3067\u304d\u307e\u3059\u3002\u305d\u3057\u3066\u3001<span>java<\/span>\u30b3\u30de\u30f3\u30c9\u3078\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u306f\u4f7f\u308f\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u5730\u5473\u306b\u9593\u9055\u3048\u3084\u3059\u3044\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main -dsa -Dxxx=test -Xmx100m -XX:-Inline\r\n\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u306f4\u3067\u3059\r\n[-dsa, -Dxxx=test, -Xmx100m, -XX:-Inline]<\/pre>\n<h3><span id=\"-main\">\uff11-\uff15\uff0emain\u30e1\u30bd\u30c3\u30c9\u306e\u7d42\u308f\u3089\u305b\u65b9<\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u308f\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3001<span>(<\/span>\u539f\u5247\u3068\u3057\u3066<span>)Java<\/span>\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3068\u3057\u3066\u306e\u5b9f\u884c\u3082\u7d42\u308f\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u7d42\u308f\u3089\u305b\u65b9\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u9806\u306b\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h4>\uff11-\uff15-\uff11\uff0ereturn\u3067<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u7d42\u308f\u3089\u305b\u308b<\/h4>\n<p>main\u30e1\u30bd\u30c3\u30c9\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u3067\u4e00\u756a\u6700\u521d\u306b\u52d5\u304f\u3082\u306e\u3060\u3068\u306f\u8a00\u3048\u3001\u666e\u901a\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3067\u3059\u306e\u3067\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u5f8c\u307e\u3067\u305f\u3069\u308a\u7740\u3051\u3070<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u7d42\u308f\u308a\u307e\u3059\u3057\u3001\u9014\u4e2d\u3067<span>return<\/span>\u3059\u308c\u3070\u3001\u9014\u4e2d\u3067\u7d42\u308f\u3089\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"for\u6587\u3092\u59cb\u3081\u307e\u3059\");\r\n\r\n\t\tfor (int i = 0; i &lt; 10; i++) {\r\n\t\t\tSystem.out.println(\"i = \" + i);\r\n\r\n\t\t\tif (i == 5) {\r\n\t\t\t\t\/\/ for\u6587\u306e\u9014\u4e2d\u3067\u3082main\u30e1\u30bd\u30c3\u30c9\u304b\u3089return\u3059\u308c\u3070\u3001\r\n\t\t\t\t\/\/ Java\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u3092\u7d42\u308f\u3089\u305b\u3089\u308c\u308b\r\n\t\t\t\tSystem.out.println(\"main\u30e1\u30bd\u30c3\u30c9\u304b\u3089return\u3057\u307e\u3059\");\r\n\t\t\t\treturn;\r\n\t\t\t}\r\n\t\t}\r\n\r\n\t\tSystem.out.println(\"for\u6587\u304c\u7d42\u308f\u308a\u307e\u3057\u305f\"); \/\/ \u3053\u308c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\u307e\u307e\u3001Java\u306e\u5b9f\u884c\u304c\u7d42\u308f\u308b\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nfor\u6587\u3092\u59cb\u3081\u307e\u3059\r\ni = 0\r\ni = 1\r\ni = 2\r\ni = 3\r\ni = 4\r\ni = 5\r\nmain\u30e1\u30bd\u30c3\u30c9\u304b\u3089return\u3057\u307e\u3059\r\n\r\nC:\\&gt;echo %ERRORLEVEL%\r\n0<\/pre>\n<p>\u3067\u3059\u304c\u3001\u5358\u7d14\u306b<span>return<\/span>\u3057\u305f\u5834\u5408\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u306e\u623b\u308a\u5024\u3092\u6307\u5b9a\u3067\u304d\u307e\u305b\u3093\u3002\u4e0a\u306e\u4f8b\u3067\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u306e\u623b\u308a\u5024\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u5909\u6570<span>&#8220;ERRORLEVEL&#8221;<\/span>\u306e\u5185\u5bb9\u304c<span>0<\/span>\u3067\u3059\u304c\u3001\u3053\u308c\u306f<span>Java<\/span>\u306e\u4e2d\u3067\u623b\u308a\u5024\u3092\u6307\u5b9a\u305b\u305a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5b9f\u884c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3059\u3002<\/p>\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u3067\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u305f\u5834\u5408\u306a\u3069\u306f\u3001\u623b\u308a\u5024\u3092\u30a8\u30e9\u30fc\u306e\u7a2e\u985e\u3092\u8868\u3059\u4f55\u304b\u306e\u6570\u5b57\u306b\u3057\u305f\u3044\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3001\u5f8c\u8ff0\u3059\u308b<span>System.exit<\/span>\u3084<span>Runtime.exit<\/span>\u3092\u4f7f\u3063\u3066\u3001\u6570\u5b57\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u3042\u3068\u3001\u30b9\u30ec\u30c3\u30c9\u3068\u3044\u3046\u3082\u306e\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3057\u3066\u3044\u308b\u6642\u306f\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u308f\u3063\u3066\u3082<span>Java<\/span>\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u308f\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304c<span>void<\/span>\u3067\u3042\u308b\u3053\u3068\u306b\u3082\u95a2\u4fc2\u3057\u307e\u3059\u306e\u3067\u3001\u8a73\u3057\u304f\u306f\u5f8c\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<h4>\uff11-\uff15-\uff12\uff0eSystem.exit\u3001Runtime.exit\u3001Runtime.halt\u3067\u3001\u623b\u308a\u5024\u3092\u6307\u5b9a\u3057\u3066\u7d42\u308f\u3089\u305b\u308b<\/h4>\n<p>main\u30e1\u30bd\u30c3\u30c9\u3092\u7d42\u308f\u3089\u305b\u308breturn\u306e\u4ed6\u306b\u3001Java\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d42\u4e86\u3055\u305b\u308b\u306a\u3089\u3001System.exit(int)\u3001Runtime.exit(int)\u3001Runtime.halt(int)\u304c\u4f7f\u3048\u307e\u3059\u3002\u3053\u308c\u3089\u306f<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u5916\u3067\u3082\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u3001\u5b9f\u884c\u3057\u305f\u6642\u70b9\u3067\u3059\u3050\u306b<span>Java<\/span>\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u304c\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3082\u3001\u3053\u308c\u3089\u306e\u30af\u30e9\u30b9\u30fb\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u306e\u623b\u308a\u5024\u3092\u6574\u6570<span>(int)<\/span>\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li>System.exit(int)\uff1aRutime.exit(int)\u3068\u540c\u3058\u3082\u306e\u3067\u3059<\/li>\n<li>Runtime.exit(int)\uff1aJava\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d42\u4e86\u3057\u307e\u3059\u304c\u3001\u7d42\u4e86\u6642\u51e6\u7406\u304c\u3042\u308b\u5834\u5408\u306f\u5b9f\u884c\u3057\u307e\u3059<\/li>\n<li><span>Runtime.halt(int)<\/span>\uff1a<span>Java<\/span>\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3059\u3050\u306b\u7d42\u4e86\u3057\u3001\u7d42\u4e86\u6642\u51e6\u7406\u304c\u3042\u3063\u3066\u3082\u5b9f\u884c\u3057\u307e\u305b\u3093<\/li>\n<\/ul>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"System.exit(255)\u3092\u5b9f\u884c\u3057\u307e\u3059\");\r\n\t\tSystem.exit(255);\r\n\t\tSystem.out.println(\"System.exit\u306e\u3042\u3068\u3067\u3059\"); \/\/ \u3053\u308c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nSystem.exit(255)\u3092\u5b9f\u884c\u3057\u307e\u3059\r\n\r\nC:\\&gt;echo %ERRORLEVEL%\r\n255<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"Runtime.getRuntime().halt(65535)\u3092\u5b9f\u884c\u3057\u307e\u3059\");\r\n\t\tRuntime.getRuntime().halt(65535);\r\n\t\tSystem.out.println(\"Runtime.getRuntime().halt\u306e\u3042\u3068\u3067\u3059\"); \/\/ \u3053\u308c\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nRuntime.getRuntime().halt(65535)\u3092\u5b9f\u884c\u3057\u307e\u3059\r\n\r\nC:\\&gt;echo %ERRORLEVEL%\r\n65535<\/pre>\n<p>\u306a\u304a\u3001Runtime.exit\u3068halt\u306e\u9055\u3044\u306f\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306aJava\u306e\u7d42\u4e86\u6642\u306b\u884c\u3044\u305f\u3044\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u304b\u3069\u3046\u304b\u3067\u3059(exit\u306f\u5b9f\u884c\u3057\u3001halt\u306f\u5b9f\u884c\u3057\u306a\u3044)\u3002\u305f\u3060\u3001\u3053\u306e\u52d5\u304d\u306e\u8a73\u7d30\u306f\u3053\u306e\u8a18\u4e8b\u306e\u7bc4\u56f2\u3092\u8d85\u3048\u307e\u3059\u306e\u3067\u3001\u8208\u5473\u304c\u3042\u308c\u3070\u300c<span>java addShutdownHook<\/span>\u300d\u306a\u3069\u3067\u691c\u7d22\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tRuntime.getRuntime().addShutdownHook(\r\n\t\t\tnew Thread(() -&gt; System.out.println(\"\u7d42\u4e86\u6642\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\")));\r\n\t\tRuntime.getRuntime().exit(0);\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\n\u7d42\u4e86\u6642\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\r\n\r\nC:\\&gt;<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tRuntime.getRuntime().addShutdownHook(\r\n\t\t\tnew Thread(() -&gt; System.out.println(\"\u7d42\u4e86\u6642\u306e\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\")));\r\n\t\tRuntime.getRuntime().halt(0);\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\n\r\nC:\\&gt;<\/pre>\n<h2><span id=\"8221public_static_void_mainString8221\">\uff12\uff0e\u3010\u767a\u5c55\u3011\u306a\u305c&#8221;public static void main(String[])&#8221;\u306a\u306e\u304b?<\/span><\/h2>\n<p>\u3053\u3053\u307e\u3067\u8aac\u660e\u3057\u3066\u304d\u305f\u3068\u304a\u308a\u3001<span>Java<\/span>\u306e<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f<span>public static void main(String[])<\/span>\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u3088\u3046\u306b<span>Java<\/span>\u4ed5\u69d8\u3067\u6c7a\u3081\u3089\u308c\u3066\u3044\u308b<span>\u2026<\/span>\u3068\u3060\u3051\u899a\u3048\u3066\u3044\u3066\u3082\u3001\u3082\u3061\u308d\u3093\u5b9f\u7528\u4e0a\u306f\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u3067\u3082\u3001\u3053\u3053\u307e\u3067\u8aad\u307f\u9032\u3081\u3066\u3044\u305f\u3060\u3044\u305f\u65b9\u3078\u306f\u3001\u305b\u3063\u304b\u304f\u3067\u3059\u304b\u3089\u300c<span>Java<\/span>\u306e<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u306a\u305c\u305d\u3046\u3044\u3046\u6c7a\u307e\u308a\u306a\u306e<span>?<\/span>\u300d\u306e\u89b3\u70b9\u304b\u3089\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u95a2\u3059\u308b\u8a71\u984c\u3092\u304a\u4f1d\u3048\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span id=\"-public\">\uff12-\uff11\uff0e\u306a\u305c<span>public<\/span>\u306a\u306e\u304b<span>?<\/span><\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u304c<span>public<\/span>\u306a\u306e\u306f\u300c\u4ed5\u69d8\u3067\u305d\u3046\u6c7a\u307e\u3063\u3066\u3044\u308b\u300d\u3060\u3051\u3067\u3059\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3092<span>private<\/span>\u3084<span>protected<\/span>\u306b\u3082\u3067\u304d\u3066\u3057\u307e\u3046\u3068\u3001\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u3092\u4f55\u306b\u3059\u3079\u304d\u304b\u6df7\u4e71\u3084\u8b70\u8ad6\u304c\u751f\u3058\u308b\u306e\u3067\u3001\u4ed5\u69d8\u3067<span>public<\/span>\u3068\u3059\u308b\u3088\u3046\u3042\u3089\u304b\u3058\u3081\u6c7a\u3081\u3066\u3042\u308b\u3060\u3051\u306a\u306e\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u3055\u3089\u306b\u306a\u305c\u3092\u9032\u3081\u308b\u306a\u3089\u3001<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306b\u3068\u3063\u3066<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c<span>public<\/span>\u3067\u3042\u308b\u3079\u304d\u7406\u7531\u306f\u306a\u3044\u304b\u3089\u3067\u3059\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c<span>protected<\/span>\u3067\u3082<span>private<\/span>\u3067\u3082\u3001\u305d\u3046\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u3053\u3068\u306f\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u8abf\u3079\u308c\u3070<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306f\u308f\u304b\u308a\u307e\u3059\u3057\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3082\u3084\u308d\u3046\u3068\u601d\u3048\u3070\u5f53\u7136\u3067\u304d\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u666e\u901a\u306e<span>Java<\/span>\u30af\u30e9\u30b9\u304b\u3089\u3067\u3082\u3001\u6a19\u6e96<span>API<\/span>\u306e\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b<span>private<\/span>\u306a<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u5225\u306e\u30af\u30e9\u30b9\u304b\u3089\u547c\u3073\u51fa\u305b\u307e\u3059\u3002\u3068\u3044\u3046\u3053\u3068\u306f\u3001<span>Java<\/span>\u305d\u306e\u3082\u306e\u3092\u52d5\u304b\u3057\u3066\u3044\u308b<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u304c\u3001\u5358\u306a\u308b<span>private<\/span>\u306a<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u305b\u306a\u3044\u306a\u3069\u3068\u306f\u3001\u5230\u5e95\u601d\u3048\u307e\u305b\u3093\u3088\u306d\u3002<\/p>\n<p>\u305d\u308c\u306b\u5b9f\u969b\u306e\u3068\u3053\u308d\u3001\u305a\u3063\u3068\u6614\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e<span>Java<\/span>\u3067\u306f\u3001<span>private<\/span>\u306a<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u5b9f\u884c\u3067\u304d\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3001\u4ed5\u69d8\u3069\u304a\u308a\u3067\u306a\u3044\u52d5\u304d\u306e<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306e\u30d0\u30b0\u3068\u3057\u3066\u3001\u958b\u767a\u4e2d\u306b\u9854\u3092\u51fa\u3057\u3066\u3044\u305f\u304f\u3089\u3044\u306a\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ private\u306a\u4ee5\u5916\u306f\u3001main\u30e1\u30bd\u30c3\u30c9\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30e1\u30bd\u30c3\u30c9\r\n\tprivate static void main(String[] args) {\r\n\t\tSystem.out.println(\"main method.\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">import java.lang.reflect.Method;\r\nimport java.lang.reflect.Modifier;\r\n\r\n\/\/ \u3053\u306e\u30af\u30e9\u30b9\u306fMain\u3068\u540c\u3058\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u3042\u308b\u3068\u3059\u308b\r\nclass CallMain {\r\n\tpublic static void main(String[] args) throws Exception {\r\n\t\t\/\/ Main\u30af\u30e9\u30b9\u3067\u5ba3\u8a00\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u306e\u4e00\u89a7\u3092\u53d6\u5f97\u3057\u3066\u3001\r\n\t\tMethod[] methods = Main.class.getDeclaredMethods();\r\n\r\n\t\t\/\/ static void main(String[])\u306a\u30e1\u30bd\u30c3\u30c9\u3092\u63a2\u3057\u3066\u5b9f\u884c\u3059\u308b\r\n\t\t\/\/ \u3053\u306e\u6642\u306b\u306f\u3001private\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3082\u547c\u3073\u51fa\u305b\u308b!!\r\n\t\tfor (Method method : methods) {\r\n\t\t\tif (Modifier.isStatic(method.getModifiers()) &amp;&amp; method.getReturnType().equals(Void.TYPE)\r\n\t\t\t\t\t&amp;&amp; method.getName().equals(\"main\")\r\n\t\t\t\t\t&amp;&amp; method.getParameterCount() == 1 &amp;&amp; method.getParameterTypes()[0].equals(String[].class)) {\r\n\t\t\t\tmethod.setAccessible(true);\r\n\t\t\t\tmethod.invoke(null, (Object) args);\r\n\t\t\t\tbreak;\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<h3><span id=\"-static\">\uff12-\uff12\uff0e\u306a\u305c<span>static<\/span>\u306a\u306e\u304b<span>?<\/span><\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u304c<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u9006\u306b\u8a00\u3048\u3070\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u99c4\u76ee\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u7406\u7531\u306f\u3001\u300c\u30af\u30e9\u30b9\u306e\u8a73\u7d30\u3092\u77e5\u3089\u306a\u304f\u3066\u3082\u3001\u7d76\u5bfe\u78ba\u5b9f\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u308b\u65b9\u6cd5\u304c<span>Java<\/span>\u306b\u306f\u306a\u3044\u300d\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u524d\u8ff0\u306e\u3068\u304a\u308a\u3001<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306e\u89b3\u70b9\u3067\u306f\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306f\u306a\u3044\u3082\u540c\u7136\u3067\u3059\u304c\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u306f\u30af\u30e9\u30b9\u304c\u6301\u3064\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3060\u3051\u3057\u304b\u4f7f\u3048\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u3001\u5f15\u6570\u306e\u3042\u308b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3057\u304b\u306a\u3044\u30af\u30e9\u30b9\u306a\u3089\u3001<span>new<\/span>\u3059\u308b\u6642\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f15\u6570\u306b\u4f55\u3092\u6307\u5b9a\u3059\u308c\u3070\u3044\u3044\u306e\u304b\u3001<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306f\u5206\u304b\u3089\u306a\u3044\u3067\u3059\u3088\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\t\/\/ \u3053\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u306b\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u304c\u2026\r\n\tpublic void main(String[] args) {\r\n\t\tSystem.out.println(\"main method.\");\r\n\t}\r\n\r\n\t\/\/ \u3053\u306e\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3053\u308c\u4e00\u3064\u3057\u304b\u306a\u3044\u3002\r\n\t\/\/ \u5f15\u6570\u306eint\u3078\u4f55\u3092\u6307\u5b9a\u3059\u3079\u304d\u304b\u306f\u3001\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30de\u3057\u304b\u308f\u304b\u3089\u306a\u3044!!\r\n\tMain(int arg) {\r\n\t}\r\n}<\/pre>\n<p>\u3067\u3059\u304b\u3089\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u3059\u3002\u3082\u3061\u308d\u3093\u3001<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u306b\u3057\u3066\u3082\u30af\u30e9\u30b9\u306e\u8aad\u307f\u8fbc\u307f\u304c\u6b63\u5e38\u306b\u7d42\u308f\u3089\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u3067\u3082\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u306b\u6bd4\u3079\u308c\u3070\u3001\u5236\u7d04\u304c\u306f\u308b\u304b\u306b\u7de9\u3044\u306e\u306f\u304a\u5206\u304b\u308a\u3044\u305f\u3060\u3051\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tstatic {\r\n\t\t\/\/ \u30af\u30e9\u30b9\u306e\u8aad\u307f\u8fbc\u307f\u6642\u306b\u5fc5\u305aRuntimeException\u304c\u767a\u751f\u3059\u308b\r\n\t\t\/\/ \u3060\u304b\u3089\u3001\u3053\u306e\u30af\u30e9\u30b9\u306e\u8aad\u307f\u8fbc\u307f\u306f\u7d76\u5bfe\u306b\u6210\u529f\u3057\u306a\u3044!!\r\n\t\tif (true) {\r\n\t\t\tthrow new RuntimeException(\"RuntimeException in static initializer!!\");\r\n\t\t}\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"main method.\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nException in thread \"main\" java.lang.ExceptionInInitializerError\r\nCaused by: java.lang.RuntimeException: RuntimeException in static initializer!!\r\n        at Main.&lt;clinit&gt;(Main.java:4)<\/pre>\n<h3><span id=\"-void\">\uff12-\uff13\uff0e\u306a\u305c<span>void<\/span>\u306a\u306e\u304b<span>?<\/span><\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304c<span>void<\/span>\u306a\u306e\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u308f\u3063\u3066\u3082<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u305d\u306e\u3082\u306e\u306e\u5b9f\u884c\u306f\u7d42\u4e86\u3057\u306a\u3044\u3053\u3068\u304c\u3042\u308b\u304b\u3089<span>\u2026<\/span>\u3068\u3082\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u30b9\u30ec\u30c3\u30c9\u3092\u751f\u6210\u3057\u3066\u5b9f\u884c\u3057\u3066\u307f\u307e\u3059\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306f\u3059\u3050\u7d42\u308f\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5f8c\u3067\u3082\u751f\u6210\u3057\u305f\u30b9\u30ec\u30c3\u30c9\u304c\u52d5\u3044\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u304c\u7d42\u308f\u308b\u306e\u306f\u3001\u5b9f\u884c\u3057\u3066\u3044\u308b\u30b9\u30ec\u30c3\u30c9\u304c\u5168\u3066\u7d42\u308f\u3063\u305f\u6642\u306a\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Main {\r\n\tpublic static void main(String[] args) {\r\n\t\tSystem.out.println(\"main\u30e1\u30bd\u30c3\u30c9\u304c\u59cb\u307e\u308a\u307e\u3057\u305f\");\r\n\t\r\n\t\t\/\/ 10\u79d2\u3060\u3051\u5f85\u3064\u3060\u3051\u306eRunnable\r\n\t\tRunnable r = new Runnable() {\r\n\t\t\tpublic void run() {\r\n\t\t\t\tSystem.out.println(\"\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u304c\u59cb\u307e\u308a\u307e\u3057\u305f\");\r\n\r\n\t\t\t\ttry {\r\n\t\t\t\t\tThread.sleep(10000); \/\/ 10\u79d2\u5f85\u3064\r\n\t\t\t\t} catch (Exception e) {\r\n\t\t\t\t}\r\n\r\n\t\t\t\tSystem.out.println(\"\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u3092\u7d42\u308f\u308a\u307e\u3059\");\r\n\t\t\t}\r\n\t\t};\r\n\r\n\t\tSystem.out.println(\"\u5225\u30b9\u30ec\u30c3\u30c9\u3092\u958b\u59cb\u3057\u307e\u3059\");\r\n\t\tnew Thread(r).start();\r\n\t\tSystem.out.println(\"main\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u308f\u308a\u307e\u3057\u305f\");\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">C:\\&gt;java Main\r\nmain\u30e1\u30bd\u30c3\u30c9\u304c\u59cb\u307e\u308a\u307e\u3057\u305f\r\n\u5225\u30b9\u30ec\u30c3\u30c9\u3092\u958b\u59cb\u3057\u307e\u3059\r\nmain\u30e1\u30bd\u30c3\u30c9\u304c\u7d42\u308f\u308a\u307e\u3057\u305f\r\n\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u304c\u59cb\u307e\u308a\u307e\u3057\u305f\r\n\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u3092\u7d42\u308f\u308a\u307e\u3059<\/pre>\n<p>\u3067\u3059\u304b\u3089\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3068\u3057\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u306e\u623b\u308a\u5024\u3092\u6307\u5b9a\u3067\u304d\u3066\u306f\u307e\u305a\u3044\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001\u30b9\u30ec\u30c3\u30c9\u3067\u306e\u5b9f\u884c\u7d50\u679c\u3092\u623b\u308a\u5024\u306b\u3057\u305f\u3044\u3053\u3068\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u3001<span>System.exit(int)<\/span>\u3001<span>Runtime.exit(int)<\/span>\u3001<span>Runtime.halt(int)<\/span>\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-8220main8221\">\uff12-\uff14\uff0e\u306a\u305c<span>&#8220;main&#8221;<\/span>\u306a\u306e\u304b<span>?<\/span><\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d\u304c<span>&#8220;main&#8221;<\/span>\u306a\u306e\u306f\u3001<span>Java<\/span>\u304c<span>C<\/span>\u8a00\u8a9e\u306e\u6d41\u308c\u3092\u304f\u3080\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3060\u304b\u3089\u3067\u3057\u3087\u3046\u3002<span>Java<\/span>\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u3057\u3066\u306e\u6587\u6cd5\u306f<span>C<\/span>\u8a00\u8a9e\u304c\u57fa\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u3001<span>C<\/span>\u8a00\u8a9e\u306e\u7d4c\u9a13\u8005\u3082\u3068\u3063\u3064\u304d\u3084\u3059\u3044\u3088\u3046\u3001<span>C<\/span>\u8a00\u8a9e\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308b<span>main<\/span>\u95a2\u6570\u3068\u540c\u3058<span>&#8220;main&#8221;<\/span>\u306b\u3057\u305f\u306e\u3060\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p><strong><span class=\"f-marker-p\">\u4f8b\uff1aC\u8a00\u8a9e\u306emain\u95a2\u6570<\/span><\/strong><\/p>\n<pre class=\"prettyprint lang:default decode:true\">#include &lt;stdio.h&gt;\r\n\r\nint main(int argc, char *argv[]) {\r\n    printf(\"Hello, world.\\n\");\r\n    return 0;\r\n}<\/pre>\n<p>\u306a\u304a\u3001<span>Java<\/span>\u3084<span>C<\/span>\u8a00\u8a9e\u4ee5\u5916\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u3082\u3001<span>main<\/span>\u3042\u308b\u3044\u306f\u305d\u308c\u306b\u8fd1\u3044\u8a00\u8449\u306f\u5927\u5909\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002\u304a\u304a\u3088\u305d\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u306b\u95a2\u9023\u3059\u308b\u3053\u3068\u306a\u306e\u3067\u3001\u899a\u3048\u3066\u304a\u3051\u3070\u3044\u3044\u3053\u3068\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3088\u3002<\/p>\n<p><strong><span class=\"f-marker-y\">\u4f8b\uff1aC#\u306emain\u30e1\u30bd\u30c3\u30c9\u306f&#8221;Main&#8221;\u3068\u3044\u3046\u540d\u524d<\/span><\/strong><\/p>\n<pre class=\"prettyprint lang:default decode:true\">using System;\r\nnamespace HelloWorld\r\n{\r\n    class Hello \r\n    {\r\n        static void Main() \r\n        {\r\n            Console.WriteLine(\"Hello, world.\");\r\n        }\r\n    }\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<p><strong><span class=\"f-marker-w\">\u4f8b\uff1aPython\u3067\u306fmain\u95a2\u6570\u305d\u306e\u3082\u306e\u306f\u306a\u3044\u304c\u3001&#8221;__main__&#8221;\u3068\u3044\u3046\u3082\u306e\u304c\u4f7f\u3048\u308b<\/span><\/strong><\/p>\n<pre class=\"prettyprint lang:default decode:true\">def main():\r\n    print(\"Hello, world.\")\r\n\r\nif __name__ == \"__main__\":\r\n    main()<\/pre>\n<h3><span id=\"-String-2\">\uff12-\uff15\uff0e\u306a\u305c\u5f15\u6570\u306fString[]\u3060\u3051\u306a\u306e\u304b?<\/span><\/h3>\n<p>main\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u304c<span>String<\/span>\u306e\u914d\u5217\u3060\u3051\u306a\u306e\u306f\u3001\u3053\u308c\u307e\u305f<span>Java<\/span>\u306f<span>C<\/span>\u8a00\u8a9e\u306e\u4ed5\u69d8\u304c\u57fa\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3089\u3068\u3082\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u308c\u306b\u3001<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3092\u8a31\u3057\u305f\u5834\u5408\u3001\u5f15\u6570\u9055\u3044\u306e\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3079\u3070\u3044\u3044\u306e\u304b\u3001<span>Java<\/span>\u4eee\u60f3\u30de\u30b7\u30f3\u306e\u7acb\u5834\u3067\u8003\u3048\u308b\u3068\u7c21\u5358\u306b\u306f\u6c7a\u3081\u3089\u308c\u306a\u3044\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>C\u8a00\u8a9e\u306e<span>main<\/span>\u95a2\u6570\u306e\u5f15\u6570\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3078\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u6570\u3068\u3001\u6587\u5b57\u5217\u3092\u683c\u7d0d\u3057\u3066\u3044\u308b<span>char<\/span>\u914d\u5217\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3067\u3059\u3002\u3067\u3082\u3001<span>Java<\/span>\u306b\u306f\u30dd\u30a4\u30f3\u30bf\u306f\u3042\u308a\u307e\u305b\u3093\u3057\u3001\u914d\u5217\u306e\u8981\u7d20\u6570\u306f\u914d\u5217\u306e<span>length<\/span>\u3067\u5206\u304b\u308b\u306e\u3067\u3001<span>String<\/span>\u914d\u5217\u3060\u3051\u3067<span>C<\/span>\u8a00\u8a9e\u3068\u307b\u307c\u540c\u3058\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3057\u3001\u305d\u308c\u4ee5\u4e0a\u306e\u60c5\u5831\u306f\u3044\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>String\u3067\u3042\u308b\u306e\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u3082\u3063\u3068\u3082\u6271\u3044\u3084\u3059\u3044\u304b\u3089\u3068\u3044\u3046\u3053\u3068\u3082\u3042\u308b\u3067\u3057\u3087\u3046\u3002\u4f55\u756a\u76ee\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u4f55\u306e\u578b\u304b\u306f\u3001<span>Java<\/span>\u3067\u4f5c\u3089\u308c\u308b\u3059\u3079\u3066\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u540c\u3058\u306b\u306f\u3067\u304d\u307e\u305b\u3093\u304b\u3089\u3001\u4e00\u756a\u7121\u96e3\u3067\u6271\u3044\u3084\u3059\u3044\u306a\u6587\u5b57\u5217\u306b\u3057\u3066\u304a\u3044\u3066\u3001\u5fc5\u8981\u306a\u3089\u30d7\u30ed\u30b0\u30e9\u30e0\u5074\u3067\u90fd\u5ea6\u5909\u63db\u3092\u3057\u3066\u304f\u3060\u3055\u3044\u3001\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<h4>\uff12-\uff15-\uff11\uff0e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u304c\u9078\u3079\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3082\u3042\u308b<\/h4>\n<p>\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u306f\u3001<span>Java<\/span>\u3068\u306f\u9055\u3063\u3066\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3068\u3059\u308b\u95a2\u6570\u30fb\u30e1\u30bd\u30c3\u30c9\u304c\u9078\u3079\u308b\u3082\u306e\u306f\u591a\u3044\u3067\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u3082\u306e\u3060\u3068\u3001\u5f15\u6570\u3084\u623b\u308a\u5024\u3092\u5fc5\u8981\u30fb\u4e0d\u8981\u306e\u3069\u3061\u3089\u306b\u3059\u308b\u304b\u30d7\u30ed\u30b0\u30e9\u30de\u304c\u9078\u3079\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001<span>C# 7.0<\/span>\u306a\u3089\u4ee5\u4e0b\u306e\u3069\u308c\u304b\u3067\u3042\u308c\u3070<span>OK<\/span>\u3067\u3059\u3002\u306a\u3093\u3068\u3001<span>C#<\/span>\u3067\u306f\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u304b\u3089\u306e\u623b\u308a\u5024\u3082<span>int<\/span>\u3068<span>void<\/span>\u304b\u3089\u9078\u3079\u308b\u3088\u3046\u3067\u3059\u306d\u3002<span>C<\/span>\u8a00\u8a9e\u3082\u3001\u57fa\u672c\u7684\u306b\u306f\u4e09\u3064\u306e\u30d1\u30bf\u30fc\u30f3\u304b\u3089\u3069\u308c\u304b\u3092\u9078\u3073\u307e\u3059<span>(<\/span>\u4e8c\u756a\u76ee\u3068\u4e09\u756a\u76ee\u306f\u5b9f\u8cea\u7684\u306b\u306f\u540c\u3058\u3067\u3059<span>)<\/span>\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">static int Main()\r\nstatic int Main(string[] args)\r\nstatic void Main()\r\nstatic void Main(string[] args)<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">int main(void)\r\nint main(int argc, char *argv[])\r\nint main(int argc, char **argv)<\/pre>\n<p>\u3067\u3059\u306e\u3067\u3001\u4f7f\u3063\u3066\u3044\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u304d\u3061\u3093\u3068\u5b66\u3093\u3067\u304a\u3051\u3070\u3001\u3044\u3056\u3068\u8a00\u3046\u6642\u306b\u4fbf\u5229\u306b\u4f7f\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3088\u3002<\/p>\n<h2><span id=\"i\">\uff13\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<span>Java<\/span>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308b<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u304a\u4f1d\u3048\u3057\u3066\u304d\u307e\u3057\u305f\u3002<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u306b\u306f<span>5<\/span>\u3064\u306e\u30eb\u30fc\u30eb\u304c\u3042\u308a\u307e\u3059\u3002\u304d\u3061\u3093\u3068\u899a\u3048\u3066\u304a\u3089\u308c\u307e\u3059\u304b<span>? &#8220;public static void main(String[])&#8221;<\/span>\u3067\u3059\u306e\u3067\u3001\u304a\u5fd8\u308c\u306a\u304f\u3002<\/p>\n<p>Java\u306e\u521d\u5fc3\u8005\u3078\u306f\u304a\u307e\u3058\u306a\u3044\u3068\u8aac\u660e\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044<span>main<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001<span>Java<\/span>\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u3057\u3066\u306e\u6e90\u6d41\u3084\u3001\u6587\u6cd5\u30fb\u5b9f\u884c\u4e0a\u306e\u5236\u9650\u306a\u3069\u304b\u3089\u5927\u304d\u306a\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u7406\u7531\u3092\u8003\u3048\u3066\u7d0d\u5f97\u3059\u308c\u3070\u3001<span>Java<\/span>\u3092\u3082\u3046\u5c11\u3057\u6df1\u304f\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u304d\u3063\u304b\u3051\u304c\u5f97\u3089\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u3088\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306emain\u30e1\u30bd\u30c3\u30c9\u306fJava\u3067\u51e6\u7406\u3092\u5b9f\u884c\u3059\u308b\u6642\u306e\u5165\u308a\u53e3\u3068\u306a\u308b\u3082\u306e\u3067\u3001\u3044\u308f\u3086\u308b\u30a8\u30f3\u30c8\u30ea\u30fc\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002main\u30e1\u30bd\u30c3\u30c9\u306b\u66f8\u304b\u308c\u305f\u51e6\u7406\u304b\u3089Java\u306e\u5b9f\u884c\u304c\u59cb\u307e\u308a\u307e\u3059\u3002 main\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u3046\u3044\u3046\u3082\u306e\u304b\u306f\u3001Java\u306e\u4ed5 [&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\/1587"}],"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=1587"}],"version-history":[{"count":9,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/1587\/revisions"}],"predecessor-version":[{"id":5797,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/1587\/revisions\/5797"}],"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=1587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=1587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}