{"id":115717,"date":"2024-03-23T03:52:03","date_gmt":"2024-03-22T18:52:03","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%82%b7%e3%83%b3%e3%82%b0%e3%83%ab%e3%83%88%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%81%ae%e5%ae%9f%e8%a3%85%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88\/"},"modified":"2024-03-27T01:07:27","modified_gmt":"2024-03-26T16:07:27","slug":"java%e3%81%ae%e3%82%b7%e3%83%b3%e3%82%b0%e3%83%ab%e3%83%88%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%81%ae%e5%ae%9f%e8%a3%85%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%82%b7%e3%83%b3%e3%82%b0%e3%83%ab%e3%83%88%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%81%ae%e5%ae%9f%e8%a3%85%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88\/","title":{"rendered":"Java\u306e\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u304b\u3002"},"content":{"rendered":"<p>Java\u3067\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306e\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\uff08\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff09<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Singleton<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">Singleton<\/span> <span class=\"hljs-variable\">instance<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Singleton<\/span>();\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-title function_\">Singleton<\/span><span class=\"hljs-params\">()<\/span> {}\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> Singleton <span class=\"hljs-title function_\">getInstance<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> instance;\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u975e\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Singleton<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> Singleton instance;\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-title function_\">Singleton<\/span><span class=\"hljs-params\">()<\/span> {}\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> Singleton <span class=\"hljs-title function_\">getInstance<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-keyword\">if<\/span> (instance == <span class=\"hljs-literal\">null<\/span>) {\r\n            instance = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Singleton<\/span>();\r\n        }\r\n        <span class=\"hljs-keyword\">return<\/span> instance;\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3001\u4e8c\u91cd\u30c1\u30a7\u30c3\u30af\u30ed\u30c3\u30af<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Singleton<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">volatile<\/span> Singleton instance;\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-title function_\">Singleton<\/span><span class=\"hljs-params\">()<\/span> {}\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> Singleton <span class=\"hljs-title function_\">getInstance<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-keyword\">if<\/span> (instance == <span class=\"hljs-literal\">null<\/span>) {\r\n            <span class=\"hljs-keyword\">synchronized<\/span> (Singleton.class) {\r\n                <span class=\"hljs-keyword\">if<\/span> (instance == <span class=\"hljs-literal\">null<\/span>) {\r\n                    instance = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Singleton<\/span>();\r\n                }\r\n            }\r\n        }\r\n        <span class=\"hljs-keyword\">return<\/span> instance;\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u9759\u7684\u5185\u90e8\u30af\u30e9\u30b9\uff08\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff09<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Singleton<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-title function_\">Singleton<\/span><span class=\"hljs-params\">()<\/span> {}\r\n\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">SingletonHolder<\/span> {\r\n        <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">Singleton<\/span> <span class=\"hljs-variable\">INSTANCE<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Singleton<\/span>();\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> Singleton <span class=\"hljs-title function_\">getInstance<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> SingletonHolder.INSTANCE;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u306f\u5358\u4e00\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u73fe\u3059\u308b\u4e00\u822c\u7684\u306a\u65b9\u6cd5\u306e\u4e00\u4f8b\u3067\u3042\u308a\u3001\u9069\u5207\u306a\u65b9\u6cd5\u306e\u9078\u629e\u306f\u8981\u4ef6\u3068\u30b9\u30ec\u30c3\u30c9\u5b89\u5168\u6027\u306e\u8981\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306e\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\uff08\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff09 public class Singleton { private static Singleton instance =  [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-115717","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306e\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u304b\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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