java: CyclicBarrier 设置arrive action

package com.example.app;

import java.util.Random;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.stream.IntStream;

public class CyclicBarrierTest2 {
    private static CyclicBarrier cyclicBarrier=new CyclicBarrier(5, new Runnable() {
        @Override
        public void run() {
            System.out.println("all threads arrived......");
        }
    });
    public static void main(String[] args) {

        for(int round=0; round<3;round++){
            IntStream.range(0,5).forEach( i -> new Thread(new Runnable() {
                @Override
                public void run() {
                    int random= new Random().nextInt(5000);
                    try {
                        Thread.sleep(random);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    try {
                        System.out.println(System.currentTimeMillis()+" "+Thread.currentThread().getName()+" got before barrier......");
                        cyclicBarrier.await();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    } catch (BrokenBarrierException e) {
                        e.printStackTrace();
                    }

                    System.out.println(System.currentTimeMillis()+" "+Thread.currentThread().getName()+" got after barrier......");

                }
            }).start());
        }

    }
}