JAVA中等待线程终止

* public final void join()throws InterruptedException
 * 等待该线程终止

public class ThreadJoinDemo  {
	public static void main(String[] args) {
		//创建线程类对象
		ThreadJoin j1=new ThreadJoin();
		ThreadJoin j2=new ThreadJoin();
		ThreadJoin j3=new ThreadJoin();
		j1.setName("hello");
		j2.setName("world");
		j3.setName("java");
		//启动线程
		j1.start();
		//设置j2的等待线程终止
		try {
			j1.join();//需要将j1执行完毕后面的才能进来（其实线程安全的同步方法：加同步锁）
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		j2.start();
		
		j3.start();
	}
}

public class ThreadJoin extends Thread {
		@Override
		public void run() {
			for(int x=0;x<100;x++) {
				System.out.println(this.getName()+" "+x);
			}
		}
	
}