CountDownLatch的使用案例

public class CountDownLatch {

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

        java.util.concurrent.CountDownLatch countDownLatch = new java.util.concurrent.CountDownLatch(6);

 

        for(int i=1;i<=6;i++){

            new Thread(()->{

                System.out.println(Thread.currentThread().getName()+"\t 上完自习，离开教室");

                countDownLatch.countDown();

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

        }

 

        countDownLatch.await();

        System.out.println(Thread.currentThread().getName()+"\t *****班长最后关门走人");

    }

}