public class CountDownLatchTest {
    private static CountDownLatch countDownLatsh = new CountDownLatch(5);

    private static class Player implements Runnable{
        private Integer index;
        public Player(Integer index){
            this.index = index;
        }

        @Override
        public void run() {
            System.out.println("玩家"+index+"準(zhǔn)備完成");
            countDownLatsh.countDown();
        }
    }

  
    public static void main(String[] args) throws InterruptedException {
    
        for(int i = 0; i < 5; i++){
            Player player = new Player(i);
            Thread thread = new Thread(player);
            thread.start();
        }
        countDownLatsh.await();

        System.out.println("玩家準(zhǔn)備完畢，開始游戲");
    }
}

public class CyclicBarrierTest {

    private static CyclicBarrier cyclicBarrier = new CyclicBarrier(5);
    
    public static class Surmount implements Runnable{
        @Override
        public void run() {

            try {
                for(int i = 1; i < 4; i++){
                    Random rand = new Random();
                    int randomNum = rand.nextInt((3000 - 1000) + 1) + 1000;//產(chǎn)生1000到3000之間的隨機(jī)整數(shù)
                    Thread.sleep(randomNum);
                    String name = Thread.currentThread().getName();
                    System.out.println(name+"翻過了第" + i +"個障礙");
                    cyclicBarrier.await();
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (BrokenBarrierException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void main(String[] args){
        for (int i = 1; i < 6; i++){
            Thread thread = new Thread(new Surmount(),"選手"+ i );
            thread.start();
        }
        System.out.println("main is end");
    }
}