{"id":683,"date":"2015-05-21T16:59:10","date_gmt":"2015-05-21T08:59:10","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=683"},"modified":"2026-08-18T12:09:33","modified_gmt":"2026-08-18T04:09:33","slug":"%e7%ba%bf%e7%a8%8b%e7%bb%93%e6%9d%9f%e7%ad%89%e5%be%85%e4%b8%8e%e7%ba%bf%e7%a8%8b%e4%bc%98%e5%8c%96%e7%ba%a7","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=683","title":{"rendered":"\u7ebf\u7a0b\u7ed3\u675f\u7b49\u5f85(join)\u4e0e\u7ebf\u7a0b\u4f18\u5148\u7ea7(Priority)"},"content":{"rendered":"
\n

\u901a\u5e38\u5e0c\u671b\u4e3b\u7ebf\u7a0b\u6700\u540e\u7ed3\u675f<\/strong>\u3002\u524d\u9762\u7684\u4f8b\u5b50\u5f80\u5f80\u5728 main()<\/code> \u91cc\u8c03\u7528 sleep()<\/code>\uff0c\u9760\u8db3\u591f\u957f\u7684\u5ef6\u8fdf\u4fdd\u8bc1\u5b50\u7ebf\u7a0b\u5148\u7ed3\u675f\u3002\u8fd9\u5e76\u4e0d\u53ef\u9760\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u600e\u4e48\u77e5\u9053\u53e6\u4e00\u4e2a\u5df2\u7ecf\u7ed3\u675f\uff1fThread \u7c7b\u63d0\u4f9b\u4e86\u56de\u7b54\u8fd9\u4e2a\u95ee\u9898\u7684\u65b9\u6cd5\u3002<\/p>\n

<\/p>\n

\u4e00\u3001isAlive \u4e0e join<\/h2>\n

\u5224\u5b9a\u7ebf\u7a0b\u662f\u5426\u7ed3\u675f\u6709\u4e24\u79cd\u505a\u6cd5\u3002\u7b2c\u4e00\u662f\u8c03\u7528 isAlive()<\/code>\uff1a<\/p>\n

final boolean isAlive()<\/code><\/pre>\n
\u6240\u8c03\u7528\u7ebf\u7a0b\u4ecd\u5728\u8fd0\u884c\u5219\u8fd4\u56de true\uff0c\u5426\u5219 false\u3002\u5b9e\u9645\u5f00\u53d1\u91cc isAlive()<\/code> \u7528\u5f97\u5c11\uff0c\u66f4\u5e38\u7528\u7684\u662f\u7b49\u5f85\u7ebf\u7a0b\u7ed3\u675f\u7684 join()<\/code>\uff1a<\/p>\n
final void join() throws InterruptedException<\/code><\/pre>\n
\u540d\u5b57\u6765\u81ea\u300c\u7b49\u5f85\u6307\u5b9a\u7ebf\u7a0b\u52a0\u5165\u8fdb\u6765\u300d\uff1a\u5f53\u524d\u7ebf\u7a0b\u963b\u585e\uff0c\u76f4\u5230\u88ab\u8c03\u7528\u7684\u90a3\u6761\u7ebf\u7a0b\u7ed3\u675f\u3002\u8fd8\u6709\u5e26\u8d85\u65f6\u7684\u91cd\u8f7d\uff0c\u53ef\u4ee5\u7ed9\u7b49\u5f85\u8bbe\u4e00\u4e2a\u4e0a\u9650\u3002<\/p>\n\n\n\n\n\n\n
\u65b9\u6cd5<\/th>\n\u4f5c\u7528<\/th>\n\u5178\u578b\u7528\u6cd5<\/th>\n<\/tr>\n<\/thead>\n
isAlive()<\/td>\n\u67e5\u8be2\u7ebf\u7a0b\u662f\u5426\u8fd8\u6d3b\u7740<\/td>\n\u8f6e\u8be2\u72b6\u6001\uff0c\u5f88\u5c11\u5355\u72ec\u4f9d\u8d56<\/td>\n<\/tr>\n
join()<\/td>\n\u7b49\u5f85\u8be5\u7ebf\u7a0b\u7ed3\u675f<\/td>\n\u4fdd\u8bc1\u4e3b\u7ebf\u7a0b\u6700\u540e\u9000\u51fa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u4e8c\u3001\u7528 join \u7b49\u5b50\u7ebf\u7a0b<\/h2>\n
\u4e0b\u9762\u662f\u524d\u9762\u4f8b\u5b50\u7684\u6539\u8fdb\u7248\uff1a\u7528 join \u786e\u4fdd\u4e3b\u7ebf\u7a0b\u6700\u540e\u7ed3\u675f\uff0c\u540c\u65f6\u4e5f\u6f14\u793a isAlive\u3002<\/p>\n
\/\/ Using join() to wait for threads to finish.\nclass NewThread implements Runnable {\n    String name;\n    Thread t;\n    NewThread(String threadname) {\n        name = threadname;\n        t = new Thread(this, name);\n        System.out.println(\"New thread: \" + t);\n        t.start();\n    }\n    public void run() {\n        try {\n            for (int i = 5; i > 0; i--) {\n                System.out.println(name + \": \" + i);\n                Thread.sleep(1000);\n            }\n        } catch (InterruptedException e) {\n            System.out.println(name + \" interrupted.\");\n        }\n        System.out.println(name + \" exiting.\");\n    }\n}\nclass DemoJoin {\n    public static void main(String args[]) {\n        NewThread ob1 = new NewThread(\"One\");\n        NewThread ob2 = new NewThread(\"Two\");\n        NewThread ob3 = new NewThread(\"Three\");\n        System.out.println(\"Thread One is alive: \" + ob1.t.isAlive());\n        System.out.println(\"Thread Two is alive: \" + ob2.t.isAlive());\n        System.out.println(\"Thread Three is alive: \" + ob3.t.isAlive());\n        try {\n            System.out.println(\"Waiting for threads to finish.\");\n            ob1.t.join();\n            ob2.t.join();\n            ob3.t.join();\n        } catch (InterruptedException e) {\n            System.out.println(\"Main thread Interrupted\");\n        }\n        System.out.println(\"Thread One is alive: \" + ob1.t.isAlive());\n        System.out.println(\"Thread Two is alive: \" + ob2.t.isAlive());\n        System.out.println(\"Thread Three is alive: \" + ob3.t.isAlive());\n        System.out.println(\"Main thread exiting.\");\n    }\n}<\/code><\/pre>\n
\u7a0b\u5e8f\u8f93\u51fa\u7c7b\u4f3c\uff1a\u4e09\u6761\u7ebf\u7a0b\u521b\u5efa\u540e isAlive \u90fd\u4e3a true\uff1b\u5012\u8ba1\u65f6\u4ea4\u9519\u6253\u5370\uff1bjoin \u8fd4\u56de\u540e\u4e09\u6761\u90fd\u662f false\uff0c\u4e3b\u7ebf\u7a0b\u624d\u9000\u51fa\u3002join \u8fd4\u56de\uff0c\u8bf4\u660e\u88ab\u7b49\u5f85\u7684\u7ebf\u7a0b\u5df2\u7ecf\u7ec8\u6b62\u3002<\/p>\n
\u4e09\u3001\u7ebf\u7a0b\u4f18\u5148\u7ea7<\/h2>\n
\u7ebf\u7a0b\u8c03\u5ea6\u7528\u4f18\u5148\u7ea7\u51b3\u5b9a\u4f55\u65f6\u5141\u8bb8\u8fd0\u884c\u3002\u7406\u8bba\u4e0a\u9ad8\u4f18\u5148\u7ea7\u6bd4\u4f4e\u4f18\u5148\u7ea7\u83b7\u5f97\u66f4\u591a CPU \u65f6\u95f4\uff1b\u5b9e\u9645\u4e0a\u8fd8\u53d7\u64cd\u4f5c\u7cfb\u7edf\u7b49\u591a\u79cd\u56e0\u7d20\u5f71\u54cd\u3002\u8bbe\u7f6e\u4f18\u5148\u7ea7\u53ea\u662f\u8ba9\u7ebf\u7a0b\u5148\u6267\u884c\u7684\u6982\u7387\u589e\u5927<\/strong>\uff0c\u5e76\u4e0d\u4fdd\u8bc1\u4e00\u5b9a\u5148\u8dd1\u3002<\/p>\n
final void setPriority(int level)\nfinal int getPriority()<\/code><\/pre>\n
level<\/code> \u5fc5\u987b\u5728 MIN_PRIORITY<\/code>\uff08\u901a\u5e38 1\uff09\u5230 MAX_PRIORITY<\/code>\uff08\u901a\u5e38 10\uff09\u4e4b\u95f4\u3002\u9ed8\u8ba4\u7528 NORM_PRIORITY<\/code>\uff08\u901a\u5e38 5\uff09\u3002\u5b83\u4eec\u90fd\u662f Thread \u91cc\u7684 final \u5e38\u91cf\u3002\u5f53\u524d\u4f18\u5148\u7ea7\u7528 getPriority()<\/code> \u8bfb\u53d6\u3002<\/p>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u522b\u7528 sleep \u8d4c\u5b50\u7ebf\u7a0b\u7ed3\u675f\uff1bjoin \u7b49\u5f85\u3001isAlive \u67e5\u8be2\uff1b\u4f18\u5148\u7ea7\u53ea\u63d0\u9ad8\u88ab\u8c03\u5ea6\u7684\u6982\u7387\uff0c\u4e0d\u4fdd\u8bc1\u987a\u5e8f\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
\u901a\u5e38\u5e0c\u671b\u4e3b\u7ebf\u7a0b\u6700\u540e\u7ed3\u675f\u3002\u524d\u9762\u7684\u4f8b\u5b50\u5f80\u5f80\u5728 main() \u91cc\u8c03\u7528 sleep()\uff0c\u9760\u8db3\u591f\u957f\u7684\u5ef6\u8fdf\u4fdd\u8bc1\u5b50\u7ebf\u7a0b\u5148\u7ed3\u675f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[19],"tags":[178],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/683"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=683"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/683\/revisions"}],"predecessor-version":[{"id":692,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/683\/revisions\/692"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=683"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=683"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}