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线程1负责打印a,b,c,d

线程2负责打印1,2,3,4

要求控制台中输出的内容为 a1b2c3d4

package com.sdmjhca.springBootDemo.countdownlatch;/** * @author JHMI on 2017/8/28. */public class TestMain {    static final Object object = new Object();    public static void main(String[] args) throws InterruptedException {        new Thread(new Runnable() {            String a[] = {
 "a","b","c","d"};            @Override            public void run() {                for(int i=0;i< 4 ;i++){                    synchronized (object){                        System.out.println("线程a 开始执行");                        object.notify();                        try {                            System.out.println("线程a 开始等待");                            object.wait();                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                        System.out.println("线程a 继续执行");                        System.out.println(a[i]);                        System.out.println("线程a 执行结束");                        object.notify();                    }                }            }        }).start();        new Thread(new Runnable() {            int a[] = {
 1,2,3,4};            @Override            public void run() {                for(int i=0;i<4;i++){                    synchronized (object){                        System.out.println("线程1 开始执行");                        object.notify();                        try {                            System.out.println("线程1 开始等待");                            object.wait();                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                        System.out.println("线程1  继续执行");                        System.out.println(a[i]);                        System.out.println("线程1  执行结束");                    }                }            }        }).start();    }}

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