java多线程 Exchanger数据交换测试代码

 学习java多线程，请同时参阅    Java多线程 信号量和屏障实现控制并发线程数量，主线程等待所有线程执行完毕1

 学习java多线程，请同时参阅：java多线程CountDownLatch简单测试

Exchanger用于进行两个线程之间的数据交换。它提供一个同步点，在这个同步点，两个线程可以交换彼此的数据。

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

public class ExchangeDemo {


    public static void main(String[] args) throws InterruptedException {

        ExecutorService threadPool= Executors.newFixedThreadPool(2);
        final Exchanger exchanger = new Exchanger();


        for(int i=0;i<6;i++){
            threadPool.execute(new Runnable(){
                @Override
                public void run() {
                    Object data = "---JavaThread-----exchanger-----" +Thread.currentThread().getName();
                        try {
                            System.out.println("------kai-------threadName-----" + Thread.currentThread().getName() + "==-data==" +"----" + data);
                            data = exchanger.exchange(data);

                            System.out.println("-------wan------threadName-----" + Thread.currentThread().getName() + "==-data==" +"----" + data);
                            Thread.sleep(10000);
                            System.out.println("-------------------------------------------------------------------------------" );
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }

                }
            });
        }

        System.out.println("---------------------开始交换数据---------------------" );
    }




}

运行代码输出如下：

---------------------开始交换数据---------------------
------kai-------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-1
------kai-------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-2
-------wan------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-2
-------wan------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-1
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
------kai-------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-1
------kai-------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-2
-------wan------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-1
-------wan------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-2
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
------kai-------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-2
------kai-------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-1
-------wan------threadName-----pool-1-thread-1==-data==-------JavaThread-----exchanger-----pool-1-thread-2
-------wan------threadName-----pool-1-thread-2==-data==-------JavaThread-----exchanger-----pool-1-thread-1
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------