用于实现两个人之间的数据交换,每个人在完成一定的事务后想与对方交换数据,第一个先拿出数据的人将一直等待第二个人拿着数据到来时,才能彼此交换数据。
package com.ljq.test.thread; 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 exchanger = new Exchanger(); service.execute(new Runnable(){ public void run() { try { String data1 = "张三"; 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 = (String)exchanger.exchange(data1); System.out.println("线程" + Thread.currentThread().getName() + "换回的数据为'" + data2+"'"); }catch(Exception e){ } } }); service.execute(new Runnable(){ public void run() { try { String data1 = "李四"; 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 = (String)exchanger.exchange(data1); System.out.println("线程" + Thread.currentThread().getName() + "换回的数据为'" + data2 + "'"); }catch(Exception e){ } } }); } }
返回结果:
线程pool-1-thread-1正在把数据'张三'换出去 线程pool-1-thread-2正在把数据'李四'换出去 线程pool-1-thread-1换回的数据为'李四' 线程pool-1-thread-2换回的数据为'张三'
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