畅聊Java多线程中的join方法
发布时间：2021-11-15 14:21:08 所属栏目：教程 来源：互联网
导读：先上代码 新建一个Thread,代码如下: package com.thread.test; public class MyThread extends Thread { private String name; public MyThread(String name) { this.name = name; } @Override public void run() { for (int i = 0; i 100; i++) { System.ou
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先上代码 新建一个Thread,代码如下: package com.thread.test; public class MyThread extends Thread { private String name; public MyThread(String name) { this.name = name; } @Override public void run() { for (int i = 0; i < 100; i++) { System.out.println(name+"["+i+"]"); } super.run(); } } 之后新建测试类,代码如下: package com.thread.test; /* * 0-50执行的是主线程,50-100执行的是A线程,并且将A线程完全执行完后才继续执行主线程 */ public class ThreadDemo{ public static void main(String[] args) { MyThread t = new MyThread("A"); t.start(); for (int i = 0; i < 100; i++) { if (i>50) { try { t.join(); } catch (InterruptedException e) { e.printStackTrace(); } } System.out.println("主线程"+"["+i+"]"); } } } 下面是Java Platform SE8 API中对Thread中Join方法的解释: public final void join(long millis) throws InterruptedExceptionWaits at most millis milliseconds for this thread to die. A timeout of 0 means to wait forever. This implementation uses a loop of this.wait calls conditioned on this.isAlive. As a thread terminates the this.notifyAll method is invoked. It is recommended that applications not use wait, notify, or notifyAll on Thread instances. Parameters: millis - the time to wait in milliseconds Throws: IllegalArgumentException - if the value of millis is negative InterruptedException - if any thread has interrupted the current thread. The interrupted status of the current thread is cleared when this exception is thrown. 先上代码 新建一个Thread,代码如下: package com.thread.test; public class MyThread extends Thread { private String name; public MyThread(String name) { this.name = name; } @Override public void run() { for (int i = 0; i < 100; i++) { System.out.println(name+"["+i+"]"); } super.run(); } } 之后新建测试类,代码如下: package com.thread.test; /* * 0-50执行的是主线程,50-100执行的是A线程,并且将A线程完全执行完后才继续执行主线程 */ public class ThreadDemo{ public static void main(String[] args) { MyThread t = new MyThread("A"); t.start(); for (int i = 0; i < 100; i++) { if (i>50) { try { t.join(); } catch (InterruptedException e) { e.printStackTrace(); } } System.out.println("主线程"+"["+i+"]"); } } } 下面是Java Platform SE8 API中对Thread中Join方法的解释: public final void join(long millis) throws InterruptedExceptionWaits at most millis milliseconds for this thread to die. A timeout of 0 means to wait forever. This implementation uses a loop of this.wait calls conditioned on this.isAlive. As a thread terminates the this.notifyAll method is invoked. It is recommended that applications not use wait, notify, or notifyAll on Thread instances. Parameters: millis - the time to wait in milliseconds Throws: IllegalArgumentException - if the value of millis is negative InterruptedException - if any thread has interrupted the current thread. The interrupted status of the current thread is cleared when this exception is thrown. 我自己的理解就是会强行进入使用join方法的线程，其他线程等待该线程完全执行完后才会进来。  （编辑：PHP编程网 - 黄冈站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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