java同步器——2——笔记

package com.current;

public class Counter {

	public void totalCount(){
		System.out.println("全国人口统计执行");
	}
	
	public void cityCount(String city){
		System.out.println(city + "-》完成人口统计");
	}
}

<pre name="code" class="java">package com.current;

import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;

public class CityThread implements Runnable{

	private Counter counter;
	private String city;
	private CyclicBarrier barrier;

	public CityThread(Counter counter, String city, CyclicBarrier barrier) {
		super();
		this.counter = counter;
		this.city = city;
		this.barrier = barrier;
	}

	@Override
	public void run() {
		try {
			Thread.currentThread().sleep(1000);
		} catch (InterruptedException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		counter.cityCount(city);
		try {
			//阻塞等待其他线程
			barrier.await();
		} catch (InterruptedException e) {
			e.printStackTrace();
		} catch (BrokenBarrierException e) {
			e.printStackTrace();
		}
	}

}

<pre name="code" class="java">package com.current;

public class TotalThread implements Runnable{

	private Counter counter;
	
	public TotalThread(Counter counter) {
		super();
		this.counter = counter;
	}

	@Override
	public void run() {
		// TODO Auto-generated method stub
		counter.totalCount();
	}

	
}

<pre name="code" class="java">package com.current;

import java.util.concurrent.CyclicBarrier;

public class CyclicBarrierDemo {

	public static void main(String[] args) {
		Counter counter = new Counter();
		//利用屏障管理线程,传入管理者线程
		CyclicBarrier barrier = new CyclicBarrier(4, new TotalThread(counter));
		new Thread(new CityThread(counter,"四川",barrier)).start();
		new Thread(new CityThread(counter,"重庆",barrier)).start();
		new Thread(new CityThread(counter,"云南",barrier)).start();
		new Thread(new CityThread(counter,"深圳",barrier)).start();
		
	}
	
}