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可以在对中对元素进行配对和交换的线程的同步点。每个线程将条目上的某个方法呈现给 exchange 方法，与伙伴线程进行匹配，并且在返回时接收其伙伴的对象。Exchanger 可能被视为 SynchronousQueue 的双向形式。Exchanger 可能在应用程序（比如遗传算法和管道设计）中很有用。
import java.util.Random; import java.util.concurrent.Exchanger; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class ExchangerTest { public static void main(String[] args) { ExecutorService service = Executors.newCachedThreadPool(); final Exchanger<String> exchanger = new Exchanger<String>(); service.execute(new Runnable() { @Override public void run() { try { String data1 = "duwenlei"; System.out.println("线程"+Thread.currentThread().getName()+"要换的数据为"+data1); System.out.println("线程"+Thread.currentThread().getName()+"等待对方"); Thread.sleep(new Random().nextInt(10000)); String data2 = exchanger.exchange(data1); //开始互换数据 System.out.println("线程"+Thread.currentThread().getName()+"互换后的数据为"+data2); } catch (InterruptedException e) { e.printStackTrace(); } } }); service.execute(new Runnable() { @Override public void run() { try { String data1 = "shenjing"; System.out.println("线程"+Thread.currentThread().getName()+"要换的数据为"+data1 ); System.out.println("线程"+Thread.currentThread().getName()+"等待对方"); Thread.sleep(new Random().nextInt(10000)); String data2 = exchanger.exchange(data1); System.out.println("线程"+Thread.currentThread().getName()+"互换后的数据为"+data2); } catch (InterruptedException e) { e.printStackTrace(); } } }); service.shutdown(); } }
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原文地址：http://www.cnblogs.com/duwenlei/p/5126447.html
