package com.jiucaiyuan.net.juc.lock;



import java.util.concurrent.CountDownLatch;



/**

 * 演示CountDownLatch

 * 6个同学陆续离开教室之后，班长才能锁门

 *

 * @Author jiucaiyuan  2022/3/13 22:40

 * @mail services@jiucaiyuan.net

 */



public class CountDownLatchDemo {

    public static void main(String[] args) throws InterruptedException {



        CountDownLatch countDownLatch = new CountDownLatch(6);



        for (int i = 1; i <= 6; i++) {

            new Thread(() -> {

                System.out.println(Thread.currentThread().getName() + "号同学离开了教室。");

                countDownLatch.countDown();

            },String.valueOf(i)).start();

        }

        countDownLatch.await();

        System.out.println(Thread.currentThread().getName() + "班长锁门离开了教室。");

    }

}