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方法后盖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<String> exchanger;    public ExchangerThreadA(Exchanger<String> 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) {        }    }}

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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