线程之间数据交换Exchanger

Exchanger用于线程间进行通信、数据交换。Exchanger提供了一个同步点exchange方法，两个线程调用exchange方法时，无论调用时间先后，两个线程会互相等到线程到达exchange方法调用点，此时两个线程可以交换数据，将本线程产出数据传递给对方。

 

 

代码示例：

package com.zte.paas.lcap.application.web;

import java.util.concurrent.Exchanger;
import java.util.stream.Stream;

/**
 * @Description: TODO
 * @Author LG
 * @Date 2022/3/15
 */
public class MoneyExchanger implements Runnable{
    //数据交换器
    Exchanger<String> exchanger = null;
    //交换数据的数组对象
    String[] moneys = null;

    public MoneyExchanger(Exchanger<String> exchanger, String[] moneys) {
        this.exchanger = exchanger;
        this.moneys = moneys;
    }

    @Override
    public void run() {
        Stream.of(moneys).forEach(money -> {
            try {
                //用money换取exMoney
                String exMoney = this.exchanger.exchange(money);
                System.out.println(Thread.currentThread().getName() + " 用 " + money + " 换 " + exMoney);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        });
    }

    public static void main(String[] args) {
        Exchanger<String> exchanger = new Exchanger<>();
        MoneyExchanger moneyExchanger = new MoneyExchanger(exchanger,new String[]{"人民币","卢布"});
        MoneyExchanger moneyExchanger2 = new MoneyExchanger(exchanger, new String[]{"美元","日元"});
        new Thread(moneyExchanger).start();
        new Thread(moneyExchanger2).start();

    }
}

 

 

执行结果：