{"id":336,"date":"2025-11-30T15:23:22","date_gmt":"2025-11-30T07:23:22","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=336"},"modified":"2025-11-30T15:23:22","modified_gmt":"2025-11-30T07:23:22","slug":"thread%e7%9a%84join%e6%96%b9%e6%b3%95_thread-join","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2025\/11\/30\/thread%e7%9a%84join%e6%96%b9%e6%b3%95_thread-join\/","title":{"rendered":"Thread\u7684join\u65b9\u6cd5_thread.join"},"content":{"rendered":"\n<p>\u4e0b\u9762\u4e3a\u4f60\u6574\u7406\u4e00\u4efd <strong>Thread.join() \u65b9\u6cd5\uff08thread.join\uff09<\/strong> \u7684\u201c\u6df1\u5165\u6d45\u51fa\u8bb2\u89e3\u201d\uff0c\u9002\u7528\u4e8e Java\u3001\u591a\u7ebf\u7a0b\u3001\u9762\u8bd5\u51c6\u5907\uff0c\u4ee5\u53ca\u6280\u672f\u6587\u7ae0\u53d1\u5e03\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83c\udf1f \u4e00\u3001<code>Thread.join()<\/code> \u662f\u4ec0\u4e48\uff1f<\/h1>\n\n\n\n<p><code>join()<\/code> \u662f Java \u4e2d Thread \u7c7b\u63d0\u4f9b\u7684\u65b9\u6cd5\uff0c\u7528\u6765\u8ba9\u4e00\u4e2a\u7ebf\u7a0b <strong>\u7b49\u5f85\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5<\/strong>\u3002<\/p>\n\n\n\n<p>\u901a\u4fd7\u7406\u89e3\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>A \u7ebf\u7a0b\u8c03\u7528 B \u7ebf\u7a0b\u7684 join()\uff0c\u8868\u793a\uff1a<br><strong>A \u8981\u7b49 B \u6267\u884c\u7ed3\u675f\u540e\u624d\u80fd\u7ee7\u7eed\u5f80\u4e0b\u8d70\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\udde9 \u4e8c\u3001join() \u7684\u57fa\u672c\u7528\u6cd5<\/h1>\n\n\n\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nThread t = new Thread(() -&gt; {\n    System.out.println(&quot;\u5b50\u7ebf\u7a0b\u6b63\u5728\u8fd0\u884c...&quot;);\n});\n\nt.start();    \/\/ \u542f\u52a8\u7ebf\u7a0b\nt.join();     \/\/ \u4e3b\u7ebf\u7a0b\u7b49\u5f85 t \u6267\u884c\u7ed3\u675f\n\nSystem.out.println(&quot;\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u6267\u884c&quot;);\n\n<\/pre><\/div>\n\n\n<p>\u8f93\u51fa\u987a\u5e8f\u4fdd\u8bc1\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\u5b50\u7ebf\u7a0b\u6b63\u5728\u8fd0\u884c...\n\u4e3b\u7ebf\u7a0b\u7ee7\u7eed\u6267\u884c\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83c\udfaf \u4e09\u3001join \u7684\u4f5c\u7528\uff08\u7ecf\u5178\u63cf\u8ff0\uff09<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8ba9\u7ebf\u7a0b\u4e4b\u95f4\u7684\u6267\u884c\u6309\u987a\u5e8f\u8fdb\u884c<\/strong><\/li>\n\n\n\n<li><strong>\u907f\u514d\u7ebf\u7a0b\u62a2\u5360\u6267\u884c\uff0c\u4fdd\u8bc1\u4e1a\u52a1\u6d41\u7a0b\u4e00\u81f4\u6027<\/strong><\/li>\n\n\n\n<li><strong>\u7528\u4e8e\u7b49\u5f85\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\u518d\u505a\u4e0b\u4e00\u6b65<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udee0 \u56db\u3001join \u7684\u4e09\u4e2a\u91cd\u8f7d\u65b9\u6cd5<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u529f\u80fd<\/th><\/tr><\/thead><tbody><tr><td><code>join()<\/code><\/td><td>\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u76ee\u6807\u7ebf\u7a0b\u6267\u884c\u7ed3\u675f<\/td><\/tr><tr><td><code>join(long millis)<\/code><\/td><td>\u6700\u957f\u7b49\u5f85 millis \u6beb\u79d2<\/td><\/tr><tr><td><code>join(long millis, int nanos)<\/code><\/td><td>\u6beb\u79d2 + \u7eb3\u79d2\u7ea7\u7b49\u5f85<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u793a\u4f8b\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nt.join(1000); \/\/ \u6700\u591a\u7b491\u79d2\n\n<\/pre><\/div>\n\n\n<p>\u5982\u679c\u7ebf\u7a0b 1 \u79d2\u5185\u6ca1\u7ed3\u675f\uff0c\u8c03\u7528 join \u7684\u7ebf\u7a0b\u4f1a\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u2699 \u4e94\u3001join \u7684\u5e95\u5c42\u539f\u7406\uff08\u9762\u8bd5\u5e38\u95ee\uff09<\/h1>\n\n\n\n<p><code>join()<\/code> \u7684\u5e95\u5c42\u539f\u7406\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5185\u90e8\u8c03\u7528\u4e86 <code>wait()<\/code> \u65b9\u6cd5\u3002<\/li>\n\n\n\n<li>\u5f53\u76ee\u6807\u7ebf\u7a0b\u6267\u884c\u5b8c\u6bd5\u65f6\uff0c\u4f1a\u81ea\u52a8 <code>notifyAll()<\/code> \u5524\u9192\u7b49\u5f85\u7684\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6e90\u7801\u7247\u6bb5\uff08\u7b80\u5316\uff09\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\npublic final void join() throws InterruptedException {\n    synchronized (this) {\n        while (isAlive()) {\n            wait(0);  \/\/ \u7b49\u5f85\u76f4\u5230\u7ebf\u7a0b\u7ed3\u675f\n        }\n    }\n}\n\n<\/pre><\/div>\n\n\n<p>\u5173\u952e\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>join \u5fc5\u987b\u5bf9\u7ebf\u7a0b\u5bf9\u8c61\u4e0a\u9501\uff08synchronized(this)\uff09<\/li>\n\n\n\n<li>\u7ebf\u7a0b\u7ed3\u675f\u65f6 JVM \u4f1a\u81ea\u52a8\u8c03\u7528 <code>notifyAll()<\/code><\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\u672c\u8d28\u4e0a\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>join = synchronized + wait + \u7ebf\u7a0b\u7ed3\u675f\u540e\u7684 notifyAll<\/strong><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83e\uddea \u516d\u3001join \u5e38\u89c1\u4f7f\u7528\u573a\u666f<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 1. \u4e3b\u7ebf\u7a0b\u7b49\u5f85\u5b50\u7ebf\u7a0b\u6267\u884c\u5b8c<\/h3>\n\n\n\n<p>\u8ba1\u7b97\u4efb\u52a1\u3001\u6587\u4ef6\u4e0b\u8f7d\u3001\u6570\u636e\u5904\u7406\u7b49\u9700\u8981\u201c\u540c\u6b65\u6267\u884c\u201d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 2. \u591a\u7ebf\u7a0b\u6267\u884c\u540e\u6536\u96c6\u6700\u7ec8\u7ed3\u679c<\/h3>\n\n\n\n<p>\u6bd4\u5982\u7edf\u8ba1\u4efb\u52a1\u3001\u5e76\u884c\u8ba1\u7b97\u540e\u6c47\u603b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 3. \u9650\u5236\u7ebf\u7a0b\u6267\u884c\u987a\u5e8f<\/h3>\n\n\n\n<p>\u786e\u4fdd A \u2192 B \u2192 C \u987a\u5e8f\u6267\u884c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 4. \u6a21\u62df\u4e32\u884c\u6548\u679c\uff08\u591a\u7ebf\u7a0b\u6309\u987a\u5e8f\u8c03\u5ea6\uff09<\/h3>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udd79 \u4e03\u3001\u4e09\u4e2a\u7ebf\u7a0b\u5fc5\u987b\u987a\u5e8f\u6267\u884c\uff08 join \u7ecf\u5178\u6848\u4f8b \uff09<\/h1>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nThread t1 = new Thread(() -&gt; System.out.println(&quot;1&quot;));\nThread t2 = new Thread(() -&gt; System.out.println(&quot;2&quot;));\nThread t3 = new Thread(() -&gt; System.out.println(&quot;3&quot;));\n\nt1.start();\nt1.join();   \/\/ \u7b49 t1\n\nt2.start();\nt2.join();   \/\/ \u7b49 t2\n\nt3.start();\nt3.join();   \/\/ \u7b49 t3\n\n<\/pre><\/div>\n\n\n<p>\u8f93\u51fa\u56fa\u5b9a\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n1\n2\n3\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u26a0 \u516b\u3001join \u4f7f\u7528\u6ce8\u610f\u4e8b\u9879\uff08\u975e\u5e38\u91cd\u8981\uff09<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. join \u5fc5\u987b\u5728 start() \u4e4b\u540e<\/h2>\n\n\n\n<p>\u5426\u5219\u7ebf\u7a0b\u6ca1\u6709\u542f\u52a8\uff0cjoin \u4f1a\u7acb\u5373\u8fd4\u56de\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. join \u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b<\/h2>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3b\u7ebf\u7a0b\u7b49\u5b50\u7ebf\u7a0b<\/li>\n\n\n\n<li>\u5b50\u7ebf\u7a0b\u7b49\u5176\u4ed6\u7ebf\u7a0b<\/li>\n<\/ul>\n\n\n\n<p>\u8981\u6ce8\u610f\u6027\u80fd\u5f71\u54cd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u907f\u514d\u6b7b\u9501<\/h2>\n\n\n\n<p>\u4f8b\u5982\u4e24\u4e2a\u7ebf\u7a0b\u4e92\u76f8 join\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nA join B\nB join A\n\n<\/pre><\/div>\n\n\n<p>\u2192 \u6c38\u8fdc\u4e92\u76f8\u7b49\u5f85\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. join \u4e0d\u80fd\u4fdd\u8bc1\u7ebf\u7a0b\u4e00\u5b9a\u6267\u884c\u6210\u529f\uff0c\u53ea\u4fdd\u8bc1\u201c\u6267\u884c\u7ed3\u675f\u201d<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\ud83d\udccc \u4e5d\u3001\u603b\u7ed3\uff08\u6781\u7b80\u7248\uff09<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u4f5c\u7528<\/td><td>\u8ba9\u5f53\u524d\u7ebf\u7a0b\u7b49\u5f85\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u7ed3\u675f<\/td><\/tr><tr><td>\u672c\u8d28<\/td><td>wait() + \u7ebf\u7a0b\u7ed3\u675f\u4e8b\u4ef6\u901a\u77e5<\/td><\/tr><tr><td>\u5e38\u7528<\/td><td>\u4e3b\u7ebf\u7a0b\u7b49\u5f85\u5b50\u7ebf\u7a0b\u3001\u591a\u7ebf\u7a0b\u6c47\u603b\u7ed3\u679c<\/td><\/tr><tr><td>\u6ce8\u610f<\/td><td>join \u4f1a\u963b\u585e\u3001\u907f\u514d\u76f8\u4e92 join<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5982\u679c\u4f60\u9700\u8981\uff0c\u6211\u53ef\u4ee5\u7ee7\u7eed\u4e3a\u4f60\u63d0\u4f9b\uff1a<\/p>\n\n\n\n<p>\ud83d\udccc Thread.sleep vs join \u5bf9\u6bd4<br>\ud83d\udccc \u591a\u7ebf\u7a0b\u8be6\u89e3\uff08volatile\u3001synchronized\u3001Lock\u3001Semaphore\uff09<br>\ud83d\udccc Java \u5e76\u53d1\u9762\u8bd5\u9898 50 \u9898<br>\ud83d\udccc join() \u5185\u90e8\u6e90\u7801 + JVM \u884c\u4e3a\u6d41\u7a0b\u56fe<\/p>\n\n\n\n<p>\u544a\u8bc9\u6211\u4f60\u60f3\u7ee7\u7eed\u6df1\u5165\u54ea\u90e8\u5206\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0b\u9762\u4e3a\u4f60\u6574\u7406\u4e00\u4efd Thread.join() \u65b9\u6cd5\uff08thread.join\uff09 \u7684&#8230; <a class=\"more-link\" href=\"https:\/\/www.52runoob.com\/index.php\/2025\/11\/30\/thread%e7%9a%84join%e6%96%b9%e6%b3%95_thread-join\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-336","post","type-post","status-publish","format-standard","hentry","category-12"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=336"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/336\/revisions"}],"predecessor-version":[{"id":337,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/336\/revisions\/337"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}