package com.jysemel.java.lock;

import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class CyclicBarrierDemo {

    private static final CyclicBarrier barrier= new CyclicBarrier(5,new Runnable() {
        @Override
        public void run() {
            System.out.println("已经就绪,可以出发了");
        }
    });

    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newCachedThreadPool();
        for (int i = 0; i < 10; i++) {
            final int threadNum = i;
            Thread.sleep(1000);
            executor.execute(() -> {
                try {
                    race(threadNum);
                } catch (Exception e) {
                    System.out.println("----------------");
                }
            });
        }
        executor.shutdown();
    }

    private static void race(int threadNum) throws Exception {
        Thread.sleep(1000);
        System.out.println("就绪----------------" + threadNum);
        barrier.await();
        System.out.println("启程----------------" + threadNum);
    }
}