多线程之Exchanger

多线程之Exchanger

Exchanger是一个用于线程间协作的工具类，用于两个线程间交换。

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例子：

方做交易，如果一方先到要等另一方也到了才能交易，交易就是执行exchange方法交换数据。

public class ExchangerTest {
    private static Exchanger<String> exchanger = new Exchanger<String>();
    static String goods = "电脑";
    static String money = "$1000";

    public static void main(String[] args) throws InterruptedException {
        System.out.println("准备交易，一手交钱一手交货...");
        // 卖家
        new Thread() {
            public void run() {
                System.out.println(getName() + " 卖家到了，已经准备好货：" + goods);
                try {
                    String money = exchanger.exchange(goods);
                    System.out.println(getName() + " 卖家收到钱：" + money);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();
        Thread.sleep(3000);
        // 买家
        new Thread() {
            public void run() {
                try {
                    System.out.println(getName() + " 买家到了，已经准备好钱：" + money);
                    String goods = exchanger.exchange(money);
                    System.out.println(getName() + " 买家收到货：" + goods);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();
    }
}

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