高级并发编程学习之使用Exchanger

     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，第一个先拿到数据的人讲一直等待第二个人拿着数据到来时候，才能交换彼此数据。

package com.lei.lock;
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(){//线程A
public void run() {
try {
/*线程A将数据zxx提交*/
String data1 = "zxx";
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);//阻塞，直到获取到线程B的数据
System.out.println("线程" + Thread.currentThread().getName() +
"换回的数据为" + data2);
}catch(Exception e){

}
}
});
service.execute(new Runnable(){//线程B
public void run() {
try {

String data1 = "lhm";
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);//阻塞，直到获取到线程A的数据
System.out.println("线程" + Thread.currentThread().getName() +
"换回的数据为" + data2);
}catch(Exception e){

}
}
});
}
}