java多线程---顺序打印ABC的三种实现---join方法

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使用join方法，让三个线程之间存在等待关系

代码如下：

package com.zcj.join;public class JoinTest {    public static void main(String[] args) {ThreadA threadA = new ThreadA();ThreadB threadB = new ThreadB(threadA);ThreadC threadC = new ThreadC(threadB);threadA.start();threadB.start();threadC.start();    }}class ThreadA extends Thread{@Overridepublic void run() {// TODO Auto-generated method stubSystem.out.println("A");}}class ThreadB extends Thread{ private ThreadA threadA;   public ThreadB(ThreadA threadA){   this.threadA =threadA;   }@Overridepublic void run() {// TODO Auto-generated method stubtry {threadA.join();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println("B");}}class ThreadC extends Thread{   private ThreadB threadB;   public ThreadC(ThreadB threadB){   this.threadB =threadB;   }@Overridepublic void run() {// TODO Auto-generated method stubtry {threadB.join();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println("C");}}

运行结果：

ABC

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