本文共 3849 字，大约阅读时间需要 12 分钟。

题目：让两个多线程交替输出

1.利用synchronized+wait/notify

package com.mooc.house.user.controller;/** * @ClassName sync_wait_notify * @Description DOTO * @Author mischen * @Date 2021/9/30 0030 6:11 * @Version 1.0 **/public class sync_wait_notify {
       public static void main(String[] args) {
           final Object o = new Object();        char[] aI = "ABCDEF".toCharArray();        char[] aC = "123456".toCharArray();        new Thread(()->{
               synchronized (o) {
                   for(char c : aI) {
                       System.out.print(c);                    try {
                           o.notify();                        o.wait(); //让出锁                    } catch (InterruptedException e) {
                           e.printStackTrace();                    }                }                o.notify(); //必须，否则无法停止程序            }        }, "t1").start();        new Thread(()->{
               synchronized (o) {
                   for(char c : aC) {
                       System.out.print(c);                    try {
                           o.notify();                        o.wait();                    } catch (InterruptedException e) {
                           e.printStackTrace();                    }                }                o.notify();            }        }, "t2").start();    }}

2.利用condition和ReentrantLock联合使用

package com.mooc.house.user.controller;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock;/** * @ClassName T01_00_Question * @Description DOTO * @Author mischen * @Date 2021/9/30 0030 6:17 * @Version 1.0 **/public class T01_00_Question {
       private char[] a1 = {
   '1','2','3','4','5','6'};    private char[] a2 = {
   'A','B','C','D','E','F'};    private ReentrantLock lock = new ReentrantLock();    private Condition c1 = lock.newCondition();    private Condition c2 = lock.newCondition();    public void m1(){
           int count = 0;        lock.lock();        //这里模拟前面四个数        while(count <= 5){
               System.out.print(a2[count++]);            try {
                   c2.signal();                c1.await();            } catch (InterruptedException e) {
                   e.printStackTrace();            }        }        c2.signal();        lock.unlock();    }    public void m2(){
           int count = 0;        lock.lock();        while(count <= 5){
               System.out.print(a1[count++]);            try {
                   c1.signal();                c2.await();            } catch (InterruptedException e) {
                   e.printStackTrace();            }        }        c1.signal();        lock.unlock();    }    public static void main(String[] args) {
           //要求用线程顺序打印A1B2C3....Z26        T01_00_Question t = new T01_00_Question();        new Thread(()->{
               t.m1();        }).start();        new Thread(()->{
               t.m2();        }).start();    }}

3.利用LockSupport

package com.mooc.house.user.controller;import java.util.concurrent.locks.LockSupport;/** * @ClassName Test1 * @Description DOTO * @Author mischen * @Date 2021/9/30 0030 5:42 * @Version 1.0 **/public class Test1 {
       static Thread t1 = null,t2=null;    public static void main(String[] args) {
           char[] a1= "ABCDEF".toCharArray();        char[] c1= "123456".toCharArray();        t1 = new Thread(() -> {
               for(char c : a1) {
                   System.out.print(c);                LockSupport.unpark(t2); //叫醒T2                LockSupport.park(); //T1阻塞            }        }, "t1");        t2 = new Thread(() -> {
               for(char c : c1) {
                   LockSupport.park(); //t2阻塞                System.out.print(c);                LockSupport.unpark(t1); //叫醒t1            }        }, "t2");        t1.start();        t2.start();    }}

转载地址：https://blog.csdn.net/miachen520/article/details/120559448 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！