同步器-Exchanger

同步器--Exchanger

用于实现两个线程间的数据交换,每个线程在完成一定的任务后想与对方交换数据,第一个先拿出数据的线程将一直等待第二个线程拿着数据到来时,才能彼些交换数据.

public class ExchangerTest {
	public static void main(String[] args) {
		final Exchanger<String> exchanger = new Exchanger<String>();
		
		ExecutorService service = Executors.newCachedThreadPool();
		service.execute(new Runnable() {
			public void run() {
				try {

					String data1 = "人民币";
					System.out.println("线程" + Thread.currentThread().getName()
							+ "正在把数据" + data1 + "换出去");
					Thread.sleep((long) (Math.random() * 10000));
					String data2 = exchanger.exchange(data1);
					System.out.println("线程" + Thread.currentThread().getName()
							+ "换回的数据为" + data2);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
		service.execute(new Runnable() {
			public void run() {
				try {

					String data1 = "白粉";
					System.out.println("线程" + Thread.currentThread().getName()
							+ "正在把数据" + data1 + "换出去");
					Thread.sleep((long) (Math.random() * 10000));
					String data2 = exchanger.exchange(data1);
					System.out.println("线程" + Thread.currentThread().getName()
							+ "换回的数据为" + data2);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
		service.shutdown();
	}
}