{"id":816,"date":"2024-02-15T08:23:01","date_gmt":"2023-01-05T01:45:09","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java-futuretask-%e7%a4%ba%e4%be%8b%e7%a8%8b%e5%ba%8f%e3%80%82\/"},"modified":"2025-08-03T10:18:13","modified_gmt":"2025-08-03T02:18:13","slug":"java-futuretask-%e7%a4%ba%e4%be%8b%e7%a8%8b%e5%ba%8f%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-futuretask-%e7%a4%ba%e4%be%8b%e7%a8%8b%e5%ba%8f%e3%80%82\/","title":{"rendered":"Java FutureTask\u5b8c\u5168\u6307\u5357\uff1a\u5f02\u6b65\u7f16\u7a0b\u5b9e\u6218\u4e0e\u793a\u4f8b\u8be6\u89e3"},"content":{"rendered":"<p>\u4e4b\u524d\u6211\u5199\u8fc7\u4e00\u7bc7\u5173\u4e8eJava Callable\u548cFuture\u63a5\u53e3\u7684\u6587\u7ae0\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u63a5\u53e3\u6765\u83b7\u5f97\u7ebf\u7a0b\u5e76\u53d1\u5904\u7406\u7684\u4f18\u52bf\uff0c\u540c\u65f6\u5b83\u4eec\u80fd\u591f\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u8c03\u7528\u7a0b\u5e8f\u3002FutureTask\u662fFuture\u63a5\u53e3\u7684\u57fa\u7840\u5177\u4f53\u5b9e\u73b0\uff0c\u63d0\u4f9b\u4e86\u5f02\u6b65\u5904\u7406\u7684\u529f\u80fd\u3002\u5b83\u5305\u542b\u4e86\u542f\u52a8\u548c\u53d6\u6d88\u4efb\u52a1\u7684\u65b9\u6cd5\uff0c\u4ee5\u53ca\u53ef\u4ee5\u8fd4\u56deFutureTask\u72b6\u6001\uff08\u5b8c\u6210\u6216\u53d6\u6d88\uff09\u7684\u529f\u80fd\u3002\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u53ef\u8c03\u7528\u5bf9\u8c61\u6765\u521b\u5efaFutureTask\uff0c\u7136\u540e\u53ef\u4ee5\u4f7f\u7528Java\u7ebf\u7a0b\u6c60\u6267\u884c\u5668\u6765\u5f02\u6b65\u5904\u7406\u8fd9\u4e9b\u4efb\u52a1\u3002\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u793a\u4f8b\u6765\u4e86\u89e3FutureTask\u7684\u7528\u6cd5\u3002\u7531\u4e8eFutureTask\u9700\u8981\u4e00\u4e2a\u53ef\u8c03\u7528\u5bf9\u8c61\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684Callable\u5b9e\u73b0\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.threads;\r\n\r\nimport java.util.concurrent.Callable;\r\n\r\npublic class MyCallable implements Callable&lt;String&gt; {\r\n\r\n\tprivate long waitTime;\r\n\t\r\n\tpublic MyCallable(int timeInMillis){\r\n\t\tthis.waitTime=timeInMillis;\r\n\t}\r\n\t@Override\r\n\tpublic String call() throws Exception {\r\n\t\tThread.sleep(waitTime);\r\n        \/\/return the thread name executing this callable task\r\n        return Thread.currentThread().getName();\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u4e0b\u9762\u662fFutureTask\u7684\u4f7f\u7528\u793a\u4f8b\uff0c\u5c55\u793a\u4e86FutureTask\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.threads;\r\n\r\nimport java.util.concurrent.ExecutionException;\r\nimport java.util.concurrent.ExecutorService;\r\nimport java.util.concurrent.Executors;\r\nimport java.util.concurrent.FutureTask;\r\nimport java.util.concurrent.TimeUnit;\r\nimport java.util.concurrent.TimeoutException;\r\n\r\npublic class FutureTaskExample {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tMyCallable callable1 = new MyCallable(1000);\r\n\t\tMyCallable callable2 = new MyCallable(2000);\r\n\r\n\t\tFutureTask&lt;String&gt; futureTask1 = new FutureTask&lt;String&gt;(callable1);\r\n\t\tFutureTask&lt;String&gt; futureTask2 = new FutureTask&lt;String&gt;(callable2);\r\n\r\n\t\tExecutorService executor = Executors.newFixedThreadPool(2);\r\n\t\texecutor.execute(futureTask1);\r\n\t\texecutor.execute(futureTask2);\r\n\t\t\r\n\t\twhile (true) {\r\n\t\t\ttry {\r\n\t\t\t\tif(futureTask1.isDone() &amp;&amp; futureTask2.isDone()){\r\n\t\t\t\t\tSystem.out.println(\"Done\");\r\n\t\t\t\t\t\/\/shut down executor service\r\n\t\t\t\t\texecutor.shutdown();\r\n\t\t\t\t\treturn;\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tif(!futureTask1.isDone()){\r\n\t\t\t\t\/\/wait indefinitely for future task to complete\r\n\t\t\t\tSystem.out.println(\"FutureTask1 output=\"+futureTask1.get());\r\n\t\t\t\t}\r\n\t\t\t\t\r\n\t\t\t\tSystem.out.println(\"Waiting for FutureTask2 to complete\");\r\n\t\t\t\tString s = futureTask2.get(200L, TimeUnit.MILLISECONDS);\r\n\t\t\t\tif(s !=null){\r\n\t\t\t\t\tSystem.out.println(\"FutureTask2 output=\"+s);\r\n\t\t\t\t}\r\n\t\t\t} catch (InterruptedException | ExecutionException e) {\r\n\t\t\t\te.printStackTrace();\r\n\t\t\t}catch(TimeoutException e){\r\n\t\t\t\t\/\/do nothing\r\n\t\t\t}\r\n\t\t}\r\n\t\t\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u8fd0\u884c\u4e0a\u8ff0\u7a0b\u5e8f\u65f6\uff0c\u60a8\u5c06\u4f1a\u6ce8\u610f\u5230\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u5b83\u6ca1\u6709\u6253\u5370\u4efb\u4f55\u5185\u5bb9\uff0c\u56e0\u4e3aFutureTask\u7684get()\u65b9\u6cd5\u4f1a\u7b49\u5f85\u4efb\u52a1\u5b8c\u6210\u7136\u540e\u8fd4\u56de\u8f93\u51fa\u5bf9\u8c61\u3002\u8fd8\u6709\u4e00\u79cd\u91cd\u8f7d\u7684\u65b9\u6cd5\u53ef\u4ee5\u53ea\u7b49\u5f85\u6307\u5b9a\u7684\u65f6\u95f4\uff0c\u6211\u4eec\u5728futureTask2\u4e2d\u4f7f\u7528\u4e86\u5b83\u3002\u8fd8\u8bf7\u6ce8\u610f\u4f7f\u7528isDone()\u65b9\u6cd5\u6765\u786e\u4fdd\u7a0b\u5e8f\u5728\u6240\u6709\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u7ec8\u6b62\u3002\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\u5c06\u4f1a\u662f\uff1a<\/p>\n<pre class=\"post-pre\"><code>FutureTask1 output=pool-1-thread-1\r\nWaiting for FutureTask2 to complete\r\nWaiting for FutureTask2 to complete\r\nWaiting for FutureTask2 to complete\r\nWaiting for FutureTask2 to complete\r\nWaiting for FutureTask2 to complete\r\nFutureTask2 output=pool-1-thread-2\r\nDone\r\n<\/code><\/pre>\n<p>\u56e0\u6b64\uff0cFutureTask\u5177\u6709\u5f88\u591a\u4f18\u52bf\uff0c\u7279\u522b\u662f\u5f53\u6211\u4eec\u60f3\u8981\u8986\u76d6\u4e00\u4e9bFuture\u63a5\u53e3\u65b9\u6cd5\u5e76\u4e14\u4e0d\u60f3\u5b9e\u73b0Future\u63a5\u53e3\u7684\u6bcf\u4e2a\u65b9\u6cd5\u65f6\uff0c\u5b83\u4f1a\u6d3e\u4e0a\u7528\u573a\u3002\u5b83\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4fbf\u6377\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5f02\u6b65\u4efb\u52a1\uff0c\u5e76\u80fd\u66f4\u597d\u5730\u63a7\u5236\u4efb\u52a1\u7684\u6267\u884c\u548c\u7ed3\u679c\u83b7\u53d6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e4b\u524d\u6211\u5199\u8fc7\u4e00\u7bc7\u5173\u4e8eJava Callable\u548cFuture\u63a5\u53e3\u7684\u6587\u7ae0\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u63a5\u53e3\u6765\u83b7\u5f97\u7ebf\u7a0b\u5e76\u53d1\u5904\u7406\u7684 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2160,189,973,710,2161],"class_list":["post-816","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-futuretask","tag-java","tag-973","tag-710","tag-2161"],"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 FutureTask\u5b8c\u5168\u6307\u5357\uff1a\u5f02\u6b65\u7f16\u7a0b\u5b9e\u6218\u4e0e\u793a\u4f8b\u8be6\u89e3 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u6df1\u5165\u89e3\u6790Java 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