TestThread2.java

package com.test;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
/**
 * 在TestThread的基础上，为CyclicBarrier 加入runnable
 * 在写完前，可以做其他事
 * @author Joy
 */
public class TestThread2 {
    public static void main(String[] args) {
        int N = 4;
        CyclicBarrier barrier  = new CyclicBarrier(N,new Runnable() {
            @Override
            public void run() {
                System.out.println("当前线程"+Thread.currentThread().getName());   
            }
        });
         
        for(int i=0;i<N;i++)
            new Writer(barrier).start();
        /*for(int i=0;i<N;i++) {
            if(i<N-1)
                new Writer(barrier).start();
            else {
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                new Writer(barrier).start();
            }
        }*/
        
    }
    static class Writer extends Thread{
        private CyclicBarrier cyclicBarrier;
        public Writer(CyclicBarrier cyclicBarrier) {
            this.cyclicBarrier = cyclicBarrier;
        }
 
        @Override
        public void run() {
            System.out.println("线程"+Thread.currentThread().getName()+"正在写入数据...");
            try {
                Thread.sleep(5000);      //以睡眠来模拟写入数据操作
                System.out.println("线程"+Thread.currentThread().getName()+"写入数据完毕，等待其他线程写入完毕");
                cyclicBarrier.await();
                System.out.println("线程"+Thread.currentThread().getName()+"在await后面");
                //cyclicBarrier.await(2000, TimeUnit.MILLISECONDS);//await指定时间，故意让其中一个线程拖延时间
                
            } catch (InterruptedException e) {
                e.printStackTrace();
            }catch(BrokenBarrierException e){
                e.printStackTrace();
            } /*catch (TimeoutException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}*/
            System.out.println("所有线程写入完毕，继续处理其他任务...");
        }
    }
}