java线程中Exchanger使用
jopen
10年前
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 返回其伙伴的对象,这时我们就需要使用线程类中的Exchanger类了,
我通过一个实例 来简单说明一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(); } } }); } }
执行完毕之后;你会发现数据完成交换
pool-1-thread-1正在把数据 abc 交换出去pool-1-thread-2正在把数据 def 交换出去
pool-1-thread-2交换数据 到 abc
pool-1-thread-1交换数据 到 def