有时我们需要对元素进行配对和交换线程的同步点，使用exchange方法 返回其火伴的对象，这时候我们就需要使用线程类中的Exchanger类了，
我通过1个实例 来简单说明1下他的使用方法及其作用：
import java.util.concurrent.Exchanger;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class TestExchanger {
/**
* @param args
*/
public static void main(String[] args) {
ExecutorService executor = Executors.newCachedThreadPool();
final Exchanger<String> exchanger = new Exchanger<String>();
executor.execute(new Runnable() {
String data1 = "abc";
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName() +"正在把数据 "+ data1+ " 交换出去" );
Thread.sleep((long) (Math.random()*1000));
String data2 = (String) exchanger.exchange(data1);
System.out.println(Thread.currentThread().getName() + "交换数据 到 "+ data2);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
executor.execute(new Runnable() {
String data1 = "def";
@Override
public void run() {
try {
System.out.println(Thread.currentThread().getName() +"正在把数据 "+ data1+ " 交换出去" );
Thread.sleep((long) (Math.random()*1000));
String data2 = (String) exchanger.exchange(data1);
System.out.println(Thread.currentThread().getName() + "交换数据 到 "+ data2);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
}
}
履行终了以后；你会发现数据完成交换
pool⑴-thread⑴正在把数据 abc 交换出去
pool⑴-thread⑵正在把数据 def 交换出去
pool⑴-thread⑵交换数据 到 abc
pool⑴-thread⑴交换数据 到 def