Java Exchanger

简介

使两个线程之间传输数据，可以传输任意的数据类型

exchange()阻塞特性

调用exchange方法后该线程会等待其他线程来交换数据，一直阻塞等待下去，直到来交换获取

public static void main(String[] args) {
    Exchanger exchanger = new Exchanger();

    ExchangerThreadA exchangerThreadA = new ExchangerThreadA(exchanger);

    exchangerThreadA.start();
   //ExchangerThreadB exchangerThreadB = new ExchangerThreadB(exchanger);
   //exchangerThreadB.start();

    System.out.println("main end");
}
/****************/
public class ExchangerThreadA extends Thread {
    
    Exchanger exchanger;

    public ExchangerThreadA(Exchanger exchanger) {
        this.exchanger = exchanger;
    }

    @Override
    public void run() {

        try {
            System.out.println("in Thread A get Thread B value " + exchanger.exchange("i come from Thread A"));
            System.out.println("end ");

        } catch (InterruptedException e) {

        }

    }
}

---

重载方法

public V exchange(V x, long timeout, TimeUnit unit)
    throws InterruptedException, TimeoutException

在超出时间没有线程来交换/获取的话，那么就会出现超时异常，进入catch 中，在另一种角度来说算是一种解决一直等待浪费线程的问题吧