Java Concurrency/Threads(1)——join详解
发布时间:2020-12-15 07:51:36 所属栏目:Java 来源:网络整理
导读:参考自:https://www.cnblogs.com/enjiex/p/3661551.html 1. Java Thread join 方法作用: 将当前线程A变为wait,执行join操作的线程B直到B结束。如果该B线程在执行中被中断. 2. join方法的三个重载: public final void join();//此方法会把当前线程变为wa
参考自:https://www.cnblogs.com/enjiex/p/3661551.html 1. Java Thread join 方法作用:将当前线程A变为wait,执行join操作的线程B直到B结束。如果该B线程在执行中被中断. 2. join方法的三个重载:public final void join();//此方法会把当前线程变为wait,直到执行join操作的线程结束,如果该线程在执行中被中断,则会抛出InterruptedException public final synchronized void join(long milis); //此方法会把当前线程变为wait,直到执行join操作的线程结束或者在执行join后等待millis的时间。因为线程调度依赖于操作系统的实现,因为这并不能保证当前线程一定会在millis时间变为RUnnable。 public final synchronized void join(long milis,int nanos); //此方法会把当前线程变为wait,直到执行join操作的线程结束或者在join后等待millis+nanos的时间。 package com.guoqiang; import static com.guoqiang.ThreadColor.*; public class Main { public static void main(String[] args) { Thread t1 = new Thread(new MyRunnable(),"t1"); Thread t2 = new Thread(new MyRunnable(),"t2"); Thread t3 = new Thread(new MyRunnable(),"t3"); t1.start(); //start second thread after waiting for 2 seconds or if it's dead try { t1.join(2000); } catch (InterruptedException e) { e.printStackTrace(); } t2.start(); //start third thread only when first thread is dead try { t1.join(); } catch (InterruptedException e) { e.printStackTrace(); } t3.start(); //let all threads finish execution before finishing main thread try { t1.join(); t2.join(); t3.join(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("All threads are dead,exiting main thread"); } } class MyRunnable implements Runnable{ @Override public void run() { System.out.println("Thread started:::"+Thread.currentThread().getName()); try { Thread.sleep(4000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("Thread ended:::"+Thread.currentThread().getName()); } } OUT: Thread started:::t1 Thread started:::t2 Thread ended:::t1 Thread started:::t3 Thread ended:::t2 Thread ended:::t3 All threads are dead,exiting main thread (编辑:李大同) 【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! |