{"id":105010,"date":"2024-03-22T09:10:28","date_gmt":"2024-03-22T00:10:28","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e8%a4%87%e6%95%b0%e3%81%ae%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%8c%e7%b5%82%e4%ba%86%e3%81%99%e3%82%8b%e3%81%ae%e3%82%92-java-%e3%81%a7%e5%be%85%e6%a9%9f%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T21:21:05","modified_gmt":"2024-03-27T12:21:05","slug":"%e8%a4%87%e6%95%b0%e3%81%ae%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%8c%e7%b5%82%e4%ba%86%e3%81%99%e3%82%8b%e3%81%ae%e3%82%92-java-%e3%81%a7%e5%be%85%e6%a9%9f%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e8%a4%87%e6%95%b0%e3%81%ae%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e3%81%8c%e7%b5%82%e4%ba%86%e3%81%99%e3%82%8b%e3%81%ae%e3%82%92-java-%e3%81%a7%e5%be%85%e6%a9%9f%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092 Java \u3067\u5f85\u6a5f\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067\u306f\u3001CountDownLatch\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092\u5f85\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>CountDownLatch\u306fJava\u304c\u63d0\u4f9b\u3059\u308b\u540c\u671f\u30d8\u30eb\u30d1\u30fc\u30af\u30e9\u30b9\u3067\u3042\u308a\u30011\u3064\u307e\u305f\u306f\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u5225\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u64cd\u4f5c\u3092\u5b8c\u4e86\u3059\u308b\u306e\u3092\u5f85\u3063\u3066\u304b\u3089\u5b9f\u884c\u3092\u7d9a\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306a\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u30e9\u30c3\u30c1\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u30ab\u30a6\u30f3\u30bf\u30fc\u3092\u30b9\u30ec\u30c3\u30c9\u6570\u306b\u521d\u671f\u5316\u3057\u307e\u3059\u3002<\/li>\n<li>\u5404\u30b9\u30ec\u30c3\u30c9\u306e\u51e6\u7406\u7d42\u4e86\u5f8c\u306bCountDownLatch\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ecountDown()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u305d\u306e\u30ab\u30a6\u30f3\u30c8\u30921\u3064\u6e1b\u3089\u3057\u307e\u3059\u3002<\/li>\n<li>\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3067CountDownLatch\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eawait()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3001\u5168\u3066\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u51e6\u7406\u3092\u5f85\u3063\u3066\u3001\u30ab\u30a6\u30f3\u30bf\u304c0\u306b\u306a\u3063\u305f\u3089\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306f\u51e6\u7406\u3092\u518d\u958b\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.concurrent.CountDownLatch;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">WaitMultipleThreads<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">threadCount<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">5<\/span>;\r\n        <span class=\"hljs-type\">CountDownLatch<\/span> <span class=\"hljs-variable\">latch<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">CountDownLatch<\/span>(threadCount);\r\n\r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; threadCount; i++) {\r\n            <span class=\"hljs-type\">Thread<\/span> <span class=\"hljs-variable\">thread<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Thread<\/span>(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">MyRunnable<\/span>(latch));\r\n            thread.start();\r\n        }\r\n\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            latch.await(); <span class=\"hljs-comment\">\/\/ \u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c\u6210<\/span>\r\n            System.out.println(<span class=\"hljs-string\">\"All threads have finished.\"<\/span>);\r\n        } <span class=\"hljs-keyword\">catch<\/span> (InterruptedException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">MyRunnable<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">Runnable<\/span> {\r\n        <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">final<\/span> CountDownLatch latch;\r\n\r\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">MyRunnable<\/span><span class=\"hljs-params\">(CountDownLatch latch)<\/span> {\r\n            <span class=\"hljs-built_in\">this<\/span>.latch = latch;\r\n        }\r\n\r\n        <span class=\"hljs-meta\">@Override<\/span>\r\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">run<\/span><span class=\"hljs-params\">()<\/span> {\r\n            <span class=\"hljs-comment\">\/\/ \u7ebf\u7a0b\u64cd\u4f5c\u903b\u8f91<\/span>\r\n            <span class=\"hljs-comment\">\/\/ ...<\/span>\r\n\r\n            latch.countDown(); <span class=\"hljs-comment\">\/\/ \u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\uff0c\u8ba1\u6570\u5668\u51cf1<\/span>\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u307e\u305aCountDownLatch\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u30ab\u30a6\u30f3\u30c8\u3092 5 \u306b\u521d\u671f\u5316\u3057\u307e\u3057\u305f\u3002\u6b21\u306b\u3001\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u3066 5 \u3064\u306e\u30b9\u30ec\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3001CountDownLatch\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5404\u30b9\u30ec\u30c3\u30c9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3057\u307e\u3059\u3002<\/p>\n<p>\u5404\u30b9\u30ec\u30c3\u30c9\u306erun()\u30e1\u30bd\u30c3\u30c9\u5185\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u884c\u3057\u3001\u6700\u5f8c\u306blatch.countDown()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u30ab\u30a6\u30f3\u30c8\u30921\u6e1b\u3089\u3059<\/p>\n<p>\u6700\u5f8c\u306b\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u3067 latch.await() \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u5168\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u884c\u5b8c\u4e86\u3092\u5f85\u3061\u307e\u3059\u3002\u30ab\u30a6\u30f3\u30bf\u304c0\u306b\u306a\u308b\u3068\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u304c\u5b9f\u884c\u3092\u518d\u958b\u3057\u3001\u300cAll threads have finished\u300d\u3068\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001CountDownLatch\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092\u5f85\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 CountDownLatch\u306fJava\u304c\u63d0\u4f9b\u3059\u308b\u540c\u671f\u30d8\u30eb\u30d1\u30fc\u30af\u30e9\u30b9\u3067\u3042\u308a\u30011\u3064\u307e\u305f\u306f\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u5225\u306e\u30b9\u30ec\u30c3\u30c9 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-105010","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>\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092 Java \u3067\u5f85\u6a5f\u3059\u308b\u65b9\u6cd5 - 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\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u7d42\u4e86\u3059\u308b\u306e\u3092-java-\u3067\u5f85\u6a5f\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta 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