线程经典面试题：现在有T1、T2、T3三个线程，你怎样保证T2在T1执行完后执行，T3在T2执行完后执行？详细讲解，j深入了解join方法

package com.threadDemo;
 
public class JoinTestSync {
 
	public static void main(String[] args) throws InterruptedException {
		// TODO Auto-generated method stub
		ThreadJoinTest1 t1 = new ThreadJoinTest1("今天");
		ThreadJoinTest1 t2 = new ThreadJoinTest1("明天");
		ThreadJoinTest1 t3 = new ThreadJoinTest1("后天");
		/*
		 * 通过join方法来确保t1、t2、t3的执行顺序
		 * */
		t1.start();
		t1.join();	
		t2.start();
		t2.join();
		t3.start();
		t3.join();
	}
 
}
class ThreadJoinTest1 extends Thread{
    public ThreadJoinTest1(String name){
        super(name);
    }
    @Override
    public void run(){
        for(int i=0;i<5;i++){
            System.out.println(this.getName() + ":" + i);
        }
    }

　　join方法深入理解：

https://blog.csdn.net/u013425438/article/details/80205693