ReadWriteLock读写锁 读写锁package com.yanxizhu; import java.util.concurrent.locks.ReadWriteLock; import java.util.concurrent.locks.ReentrantReadWriteLock; /** * @description: 读写锁(互斥锁) * @author: <a href="mailto:batis@foxmail.com">清风</a> * @date: 2022/3/19 15:23 * @version: 1.0 */ public class ReadWriteDemo { public static void main(String[] args) { ReadWriteTest readWriteTest = new ReadWriteTest(); new Thread(()->{ readWriteTest.write((int) (Math.random()*101)); },"写锁").start(); for(int i=1;i<50;i++){ new Thread(()->{ readWriteTest.get(); },"读锁").start(); } } } class ReadWriteTest{ int num =0; private ReadWriteLock readWriteLock = new ReentrantReadWriteLock(); //读 public void get(){ readWriteLock.readLock().lock(); try{ System.out.println(num+"=="+Thread.currentThread().getName()); }finally { readWriteLock.readLock().unlock(); } } //写 public void write(int i){ readWriteLock.writeLock().lock(); try{ this.num=i; }finally { readWriteLock.writeLock().unlock(); } } }