\u30bf\u30a4\u30de\u30fc\u30cd\u30bf\u304c\u7d9a\u3044\u3066\u3044\u307e\u3059\u304c\u3001Java Concurrent\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u3063\u305fTimer\u3082\u3067\u304d\u308b\u3002\u3069\u306e\u30bf\u30a4\u30de\u30fc\u3082\u9577\u6240\u3068\u77ed\u6240\u304c\u3042\u308b\u306e\u3067\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u3069\u308c\u3092\u5229\u7528\u3059\u308c\u3070\u826f\u3044\u304b\u6c7a\u3081\u308c\u3070\u3088\u3044\u3060\u308d\u3046\u3002<\/p>\n
\nJava Concurrent\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u3063\u305fTimer\u306f\u3001java.util.concurrent.ScheduledExecutorService\u3092\u4f7f\u3048\u3070\u5b9f\u73fe\u3067\u304d\u308b\u3002Timer\u306e\u5909\u308f\u308a\u306bScheduledExecutorService\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306escheduler\u3092\u4f7f\u3063\u3066\u3001\u505c\u6b62\u3055\u305b\u308b\u3068\u304d\u306b\u306f\u3053\u306e\u8fd4\u5374\u5024\u306eScheduledFuture\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ecancel\u3092\u547c\u3093\u3067\u3044\u308b\u3002stop\u30e1\u30bd\u30c3\u30c9\u3092task\u306erun\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3042\u305f\u308a\u3067\u53c2\u7167\u95a2\u4fc2\u304c\u6c17\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u304c\u3001\u3068\u308a\u3042\u3048\u305a\u30b5\u30f3\u30d7\u30eb\u306a\u306e\u3067\u3053\u3046\u3057\u3066\u3044\u308b\u3002scheduler\u306e\u7d42\u4e86\u51e6\u7406\u306b\u3064\u3044\u3066\u3082\u8a18\u8f09\u3057\u3066\u304a\u304d\u305f\u304b\u3063\u305f\u306e\u3067\u3001\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\u306712\u79d2\u5f85\u6a5f\u3057\u3066\u304b\u3089shutdownNow\u3059\u308b\u30b3\u30fc\u30c9\u306b\u3057\u3066\u3042\u308b\u3002<\/p>\n
\r\npackage org.sssg.soft.sample.timer;\r\n\r\nimport java.util.concurrent.Executors;\r\nimport java.util.concurrent.ScheduledExecutorService;\r\nimport java.util.concurrent.ScheduledFuture;\r\nimport java.util.concurrent.TimeUnit;\r\n\r\npublic class SimpleConcurrentTimer {\r\n private final static long PERIOD = 1000L;\r\n private Runnable task;\r\n private ScheduledExecutorService scheduler;\r\n private ScheduledFuture<?> future;\r\n private final static int COUNT = 10;\r\n\r\n public SimpleConcurrentTimer() {\r\n task = new Runnable() {\r\n int i = COUNT;\r\n\r\n public void run() {\r\n System.out.println(i--);\r\n if (i < 0) {\r\n stop();\r\n }\r\n }\r\n };\r\n scheduler = Executors.newSingleThreadScheduledExecutor();\r\n }\r\n\r\n public void stop() {\r\n scheduler.schedule(new Runnable() {\r\n public void run() {\r\n future.cancel(true);\r\n System.out.println("future canceled");\r\n }\r\n }, 0, TimeUnit.SECONDS);\r\n }\r\n\r\n public void run() {\r\n System.out.println("future start");\r\n future = scheduler.scheduleAtFixedRate(task, 0, PERIOD,\r\n TimeUnit.MILLISECONDS);\r\n try {\r\n Thread.sleep(12 * 1000);\r\n } catch (InterruptedException e) {\r\n e.printStackTrace();\r\n }\r\n scheduler.shutdownNow();\r\n System.out.println("shutdowned");\r\n }\r\n\r\n public static final void main(final String[] args) {\r\n SimpleConcurrentTimer app = new SimpleConcurrentTimer();\r\n app.run();\r\n }\r\n}\r\n<\/pre>\n\u3061\u306a\u307f\u306b\u3001Executor\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001Executors\u306estatic\u306a\u30d5\u30a1\u30af\u30c8\u30ea\u30fb\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u751f\u6210\u3067\u304d\u308b\u3002ScheduledExecutor\u306b\u306fnewScheduledThreadPool\u3084newSingleThreadScheduledExecutor\u304c\u3042\u308b\u3002\u524d\u8005\u306f\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f5c\u308b\u3053\u3068\u304b\u3089\u8907\u6570\u30b9\u30ec\u30c3\u30c9\u5bfe\u5fdc\u7248\u3067\u3001\u5f8c\u8005\u306f\u5358\u4e00\u30b9\u30ec\u30c3\u30c9\u5bfe\u5fdc\u7248\u306eScheduledExecutor\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u3068\u306a\u308b\u3002\u3053\u3053\u3067\u306f\u3001newSingleThreadScheduledExecutor\u3092\u4f7f\u3063\u3066\u3044\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30bf\u30a4\u30de\u30fc\u30cd\u30bf\u304c\u7d9a\u3044\u3066\u3044\u307e\u3059\u304c\u3001Java Concurrent\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u3063\u305fTimer\u3082\u3067\u304d\u308b\u3002\u3069\u306e\u30bf\u30a4\u30de\u30fc\u3082\u9577\u6240\u3068\u77ed\u6240\u304c\u3042\u308b\u306e\u3067\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066\u3069\u308c\u3092\u5229\u7528\u3059\u308c\u3070\u826f\u3044\u304b\u6c7a\u3081\u308c\u3070\u3088\u3044\u3060\u308d\u3046\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[550,1207,547],"class_list":["post-7558","post","type-post","status-publish","format-standard","hentry","category-java","tag-concurrent","tag-java","tag-timer"],"_links":{"self":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts\/7558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/comments?post=7558"}],"version-history":[{"count":1,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts\/7558\/revisions"}],"predecessor-version":[{"id":7559,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/posts\/7558\/revisions\/7559"}],"wp:attachment":[{"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/media?parent=7558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/categories?post=7558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro345.net\/blogs\/hiro345\/wp-json\/wp\/v2\/tags?post=7558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}