Exchanger

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Exchanger
 
    用于实现两个人之间的数据交换，每个人在完成一定的事务后想与对方交换数据，第一个先拿出数据的人将一直等待第二个人拿着数据到来时，才能彼此交换数据。

package com.ronbay.thread.timer;

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

public class ExchangerTest {

	public static void main(String[] args) {
		ExecutorService service = Executors.newCachedThreadPool();
		final Exchanger exchanger = new Exchanger();
		service.execute(new Runnable() {
			@Override
			public void run() {
				try {
					String data1 = "zxx";
					System.out.println("线程" + Thread.currentThread().getName() + "正准备把数据" + data1 + "换出去");
					Thread.sleep((long)Math.random()*10000);
					
					String data2 = (String)exchanger.exchange(data1);
					System.out.println("线程" + Thread.currentThread().getName() + "换回数据为" + data2);
				} catch (Exception e) {
				}
			}
		});
		
		service.execute(new Runnable() {
			
			@Override
			public void run() {
				try {
					String data1 = "1hm";
					System.out.println("线程" + Thread.currentThread().getName() + "正把数据" + data1 + "换出去");
					Thread.sleep((long)Math.random()*10000);
					String data2 = (String)exchanger.exchange(data1);
					System.out.println("线程" + Thread.currentThread().getName() + "换回数据为" + data2);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		});
	}

}