Java并发-28.并发工具类-Exchanger

2019-06-13 16:29:00 浏览数 (1)

  • Exchanger用于进行线程间的数据交换。
  • 提供一个同步点,在这个同步点,两个线程可以交换彼此的数据。
  • 第一个线程执行exchange方法,阻塞等待第二个线程也执行exchange方法,都到达同步点时,线程就可以交换数据
  • exchange(V x, long timeout, TimeUnit unit)方法可以超时等待
代码语言:javascript复制
import java.util.concurrent.Exchanger;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @author pengjunzhe
 */
public class ExchangerTest {
    private static Exchanger<String> exchanger = new Exchanger<>();
    private static ExecutorService threadpool = Executors.newFixedThreadPool(2);

    public static void main(String[] args) {
        threadpool.execute(() -> {
            String A = "银行流水A";
            try {
                String C = exchanger.exchange(A);
                System.out.println("A收到的是:"   C);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        });
        threadpool.execute(() -> {
            try {
                String B = "银行流水B";
                String A= exchanger.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) {
                e.printStackTrace();
            }

        });
        threadpool.shutdown();
    }
}

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