1 package com.atguigu.boot.com.atguigu;
 2 
 3 import com.sun.org.apache.bcel.internal.generic.NEW;
 4 
 5 import java.util.concurrent.CountDownLatch;
 6 
 7 public class CountDownLatchDemo {
 8     private static final int CONSTANT_NUM=6;
 9 
10     public static void main(String[] args) throws InterruptedException {
11         CountDownLatch count=new CountDownLatch(CONSTANT_NUM);
12         for (int i = 1; i <7 ; i++) {
13             new Thread(()->{
14                 System.out.println(Thread.currentThread().getName()+"\t 国，被灭");
15                 count.countDown();
16             },CountryEnum.forEach_CountryEnum(i).getMess()).start();
17         }
18         count.await();
19         System.out.println(Thread.currentThread().getName()+"\t ********秦帝国，统一华夏");
20     }
21 
22     private static void closeDoor() throws InterruptedException {
23         CountDownLatch count=new CountDownLatch(CONSTANT_NUM);
24         for (int i = 0; i <6 ; i++) {
25             new Thread(()->{
26                 System.out.println(Thread.currentThread().getName()+"\t 上完自习，离开教室");
27                 count.countDown();
28             },String.valueOf(i)).start();
29         }
30         count.await();
31         System.out.println(Thread.currentThread().getName()+"\t ********班长最后关门走人");
32     }
33 }