Exchanger的简单示例

两个线程可以交换对象的同步点。每个线程都在进入 exchange 方法时给出某个对象，并接受其他线程返回时给出的对象。

public class Test {
	public static void main(String[] args) {
		final Exchanger exch = new Exchanger();
		
		ExecutorService exec = Executors.newCachedThreadPool();
		exec.execute(new Runnable(){
			@Override
			public void run() {
				String s1 = "S1中国";
				try {
					s1 = exch.exchange(s1);
					System.out.println("s1#"+s1);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}}
		);
		
		exec.execute(new Runnable(){
			@Override
			public void run() {
				String s2 = "S2外国";
				try {
					s2 = exch.exchange(s2);
					System.out.println("s2#"+s2);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}}
		);
	}
/**
 * 输出结果:
 * s1#S2外国
 * s2#S1中国
 */
}