{"id":203970,"date":"2025-05-22T11:04:55","date_gmt":"2025-05-22T03:04:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203970\/"},"modified":"2025-05-22T11:04:55","modified_gmt":"2025-05-22T03:04:55","slug":"java-%e5%a4%9a%e7%ba%bf%e7%a8%8b%e5%90%8c%e6%ad%a5%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e6%88%91%e7%9a%84%e4%bb%a3%e7%a0%81%e8%bf%90%e8%a1%8c%e7%bb%93%e6%9e%9c%e4%b8%8d%e7%a8%b3%e5%ae%9a%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203970\/","title":{"rendered":"Java \u591a\u7ebf\u7a0b\u540c\u6b65\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u4e0d\u7a33\u5b9a\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u591a\u7ebf\u7a0b\u540c\u6b65\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u4e0d\u7a33\u5b9a\uff1f <\/h1>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aJava \u591a\u7ebf\u7a0b\u540c\u6b65\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u4e0d\u7a33\u5b9a\uff1f \u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

<\/p>\n

java \u591a\u7ebf\u7a0b\u540c\u6b65\u8c1c\u56e2<\/strong><\/p>\n

\u95ee\u9898\u5448\u73b0<\/strong><\/p>\n

\u5728\u8fdb\u884c\u591a\u7ebf\u7a0b\u7f16\u7a0b\u65f6\uff0c\u6253\u7b97\u5408\u7406\u5229\u7528\u7ebf\u7a0b\u5904\u7406\u8017\u65f6\u4efb\u52a1\u3002\u4f46\u662f\uff0c\u5728\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\u65f6\uff0c\u9047\u5230\u4e86\u4ee4\u4eba\u56f0\u60d1\u7684\u95ee\u9898\uff1a<\/p>\n

import java.util.concurrent.executorservice;\nimport java.util.concurrent.executors;\nimport java.util.concurrent.timeunit;\n\npublic class multithreadtest {\n\n    private static volatile int lt_num = 0;\n    private static executorservice executor = executors.newfixedthreadpool(20);\n\n    public static void main(string[] args) {\n        for (int i = 0; i < 20; i++) {\n            lt_num = i;\n            executor.execute(() -> num(lt_num));\n        }\n        executor.shutdown();\n        executor.awaittermination(1, timeunit.seconds);\n    }\n\n    public static void num(int lt_num) {\n        try {\n            thread.sleep(1);\n        } catch (interruptedexception e) {\n            e.printstacktrace();\n        }\n        system.out.println(num++);\n    }\n}<\/pre>\n
\u95ee\u9898\u5206\u6790<\/strong><\/p>\n
\u539f\u672c\u7684\u9884\u671f\u662f\uff0c\u7ed3\u679c\u4e2d\u5e94\u8be5\u5305\u542b 1 \u5230 20 \u8fd9 20 \u4e2a\u6570\uff0c\u987a\u5e8f\u5e76\u4e0d\u91cd\u8981\uff0c\u4f46\u4e0d\u80fd\u51fa\u73b0\u91cd\u590d\u3002\u7136\u800c\uff0c\u7ed3\u679c\u5374\u51fa\u73b0\u968f\u673a\u6027\uff0c\u751a\u81f3\u51fa\u73b0\u4e86\u91cd\u590d\u7684\u60c5\u51b5\u3002<\/p>\n
\u89e3\u51b3\u5efa\u8bae<\/strong><\/p>\n
\u95ee\u9898\u6839\u6e90\u5728\u4e8e num() \u65b9\u6cd5\u662f\u975e\u540c\u6b65\u6267\u884c\u7684\uff0c\u7f3a\u5c11\u5fc5\u8981\u7684\u540c\u6b65\u673a\u5236\u3002\u5728 main() \u65b9\u6cd5\u4e2d\uff0clt_num++ \u64cd\u4f5c\u6ca1\u6709\u52a0\u9501\uff0c\u5bfc\u81f4\u591a\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u540c\u65f6\u4fee\u6539 lt_num \u53d8\u91cf\u3002\u4e3a\u4e86\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u9700\u8981\u5728 lt_num = i \u4e4b\u524d\u52a0\u4e0a\u9501\uff0c\u5e76\u5728\u8c03\u7528 num() \u65b9\u6cd5\u540e\u91ca\u653e\u9501\u3002\u4fee\u6539\u540e\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
public static void main(String[] args) {\n    for (int i = 0; i < 20; i++) {\n        synchronized (MultiThreadTest.class) {\n            lt_num = i;\n            executor.execute(() -> num(lt_num));\n        }\n    }\n}<\/pre>\n
\u901a\u8fc7\u5f15\u5165\u540c\u6b65\u673a\u5236\uff0cnum() \u65b9\u6cd5\u4e2d\u7684 lt_num++ \u64cd\u4f5c\u59cb\u7ec8\u662f\u5728\u4e00\u4e2a\u7ebf\u7a0b\u4e2d\u72ec\u5360\u6267\u884c\uff0c\u4ece\u800c\u786e\u4fdd\u4e86\u7ed3\u679c\u7684\u6b63\u786e\u6027\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aJava \u591a\u7ebf\u7a0b\u540c\u6b65\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684\u4ee3\u7801\u8fd0\u884c\u7ed3\u679c\u4e0d\u7a33\u5b9a\uff1f \u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java \u591a\u7ebf\u7a0b\u540c\u6b65\uff1a\u4e3a\u4ec0\u4e48\u6211\u7684...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203970","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203970"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203970\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}