{"id":766,"date":"2020-06-24T14:05:12","date_gmt":"2020-06-24T06:05:12","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=766"},"modified":"2020-06-24T14:05:24","modified_gmt":"2020-06-24T06:05:24","slug":"countdownlatch%ef%bc%8ccyclicbarrier%ef%bc%8csemaphore","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=766","title":{"rendered":"CountDownLatch\uff0cCyclicBarrier\uff0cSemaphore"},"content":{"rendered":"\n<pre class=\"wp-block-preformatted\">\u53c2\u8003\u8fd9\u7bc7<br><a href=\"https:\/\/mp.weixin.qq.com\/s\/TDw7GnzDw5FK3RWwkIzzZA\">https:\/\/mp.weixin.qq.com\/s\/TDw7GnzDw5FK3RWwkIzzZA<\/a><\/pre>\n\n\n\n<p>\u603b\u7ed3\u4e00\u4e0b<\/p>\n\n\n\n<p>CountDownLatch\u662f\u4e00\u4e2a\u7ebf\u7a0b\u7b49\u5176\u4ed6\u7ebf\u7a0b\uff0cCyclicBarrier\u662f\u591a\u4e2a\u7ebf\u7a0b\u95f4\u76f8\u4e92\u7b49\u5f85<\/p>\n\n\n\n<p>CountDownLatch\uff0c\u6bcf\u6b21-1\uff0c\u76f4\u52300\uff0cCyclicBarrier\u6bcf\u6b21\u52a01\uff0c\u76f4\u5230\u56fa\u5b9a\u503c<\/p>\n\n\n\n<p>CountDownLatch\u53ea\u80fd\u5355\u6b21\u4f7f\u7528\uff0cCyclicBarrier\u53ef\u4ee5\u5faa\u73af\u4f7f\u7528<\/p>\n\n\n\n<p>CyclicBarrier \u53ef\u4ee5\u5728\u6700\u540e\u4e00\u4e2a\u7ebf\u7a0b\u8fbe\u5230\u5c4f\u969c\u4e4b\u524d\uff0c\u9009\u62e9\u5148\u6267\u884c\u4e00\u4e2a\u64cd\u4f5c\u3002<br><\/p>\n\n\n\n<p>Semaphore\uff0c\u62ff\u5230\u8bb8\u53ef\u7684\u53ef\u4ee5\u6267\u884c\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u662f\u5426\u516c\u5e73<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u4e0b\u9762\uff0c\u7ed9\u4e2asemaphore\u7684\u4f8b\u5b50<br><br>public class SemaphoreTest {<br>    private static int count = 20;<br><br>    public static void main(String[] args) {<br><br>        ExecutorService executorService = Executors.newFixedThreadPool(count);<br><br>        \/\/\u6307\u5b9a\u6700\u591a\u53ea\u80fd\u6709\u4e94\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6267\u884c<br>        Semaphore semaphore = new Semaphore(5, true);<br><br>        Random random = new Random();<br>        for (int i = 0; i &lt; count; i++) {<br>            final int no = i;<br>            executorService.execute(new Runnable() {<br>                @Override<br>                public void run() {<br>                    try {<br>                        \/\/\u83b7\u5f97\u8bb8\u53ef<br>                        semaphore.acquire();<br>                        System.out.println(no +\":\u53f7\u8f66\u53ef\u901a\u884c\");<br>                        \/\/\u6a21\u62df\u8f66\u8f86\u901a\u884c\u8017\u65f6<br>                        Thread.sleep(random.nextInt(2000));<br>                        \/\/\u91ca\u653e\u8bb8\u53ef<br>                        semaphore.release();<br>                    } catch (InterruptedException e) {<br>                        e.printStackTrace();<br>                    }<br>                }<br>            });<br>        }<br><br>        executorService.shutdown();<br><br>    }<br>}<br>\u6307\u5b9a\u540c\u65f6\u53ef\u4ee5\u83b7\u5f97\u9501\u7684\u4e2a\u6570\uff0c\u548c\u662f\u5426\u4f7f\u7528\u516c\u5e73\u9501\u3002\u6267\u884c\u5b8c\u4e86\uff0c\u5728\u91ca\u653e\u5373\u53ef\u3002<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u53c2\u8003\u8fd9\u7bc7https:\/\/mp.weixin.qq.com\/s\/TDw7GnzDw5FK3RWwkIzzZA \u603b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[40,41,42,43],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/766"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=766"}],"version-history":[{"count":10,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/766\/revisions"}],"predecessor-version":[{"id":776,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/766\/revisions\/776"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}