多线程之减法计数器

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最新推荐文章于 2024-05-07 18:36:17 发布

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分类专栏：基础文章标签： java

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package com.lyon.juc;

import java.util.concurrent.CountDownLatch;

//减法计数器
public class CountDownLatchDemo {
    public static void main(String[] args) throws InterruptedException {
        //总数是5
        CountDownLatch countDownLatch = new CountDownLatch(5);
        for (int i = 1; i <= 5; i++) {
            new Thread(()->{
                System.out.println(Thread.currentThread().getName()+"go out");
                countDownLatch.countDown();//数量减1
            },String.valueOf(i)).start();
        }
        countDownLatch.await();//等待计数器归零，然后在向下执行
        System.out.println("Close door");
    }
}