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894天前/** |
* 线程的结合。 |
* 当一个线程需要等待另一个线程结束时，叫做线程的结合。 |
*/ |
public class JoinThread { |
/** 自定义线程类 */ |
static class ThreadA extends Thread{ |
//线程的ID |
private int ID = 0; |
//线程运行时循环的次数 |
private int whileTimes = 0; |
public ThreadA(int id, int times){ |
this.ID = id; |
this.whileTimes = times; |
} |
public void run(){ |
System.out.println("ThreadA" + this.ID + " begin!"); |
int i=0; |
try { |
//连续循环whileTimes次 |
while (i < this.whileTimes){ |
System.out.println("ThreadA-" + this.ID + ": " + i++); |
//sleep方法将当前线程休眠。 |
Thread.sleep(200); |
} |
} catch (InterruptedException e) { |
} |
System.out.println("ThreadA" + this.ID + " end!"); |
} |
} |
public static void main(String[] args) { |
//新建4个线程对象 |
Thread thread1 = new ThreadA(1, 3); |
Thread thread2 = new ThreadA(2, 2); |
Thread thread3 = new ThreadA(3, 2); |
Thread thread4 = new ThreadA(4, 4); |
//启动所有线程 |
System.out.println("Main method begin. To start 4 threads!"); |
thread1.start(); |
thread2.start(); |
thread3.start(); |
thread4.start(); |
//等待所有线程运行结束 |
try { |
thread1.join(); |
thread2.join(); |
thread3.join(); |
thread4.join(); |
} catch (InterruptedException e) { |
e.printStackTrace(); |
} |
//此时所有线程都运行结束 |
System.out.println("Main method end! All 4 threads are ended"); |
} |
} |
