线程间交换数据的Exchanger

Exchanger是一个用于线程间协作的工具类。Exchanger用于进行线程间的数据交换

示例：

class ExchangerTest{
    private static final Exchanger<String> exgr = new Exchanger<String>();
    private static ExecutorService threadPool = Executors.newFixedThreadPool(2);
    public static void main(String[] args){
        threadPool.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    String A = "银行流水A"; //A录入银行流水数据
                    String c = exgr.exchange(A);
                }catch (InterruptedException e){

                }
            }
        });
        threadPool.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    String B = "银行流水B";
                    String A = exgr.exchange(B);
                    System.out.println("A和B数据是否一致：" + A.equals(B) + ", A录入的是：" + A + "，B录入的是：" + B);
                }catch (InterruptedException e){

                }
            }
        });
        threadPool.shutdown();
    }
}

输出：

A和B数据是否一致：false, A录入的是：银行流水A，B录入的是：银行流水B