java 多線程 day17 Exchanger

import java.util.concurrent.Exchanger;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;public class Thread1701_Exchanger {    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 = "zxx";                    System.out.println("線程" + Thread.currentThread().getName() +                            "正在把數據" + data1 +"換出去");                    Thread.sleep((long)(Math.random()*10000));                    String data2 = (String)exchanger.exchange(data1);                    System.out.println("線程" + Thread.currentThread().getName() +                            "換回的數據爲" + data2);                }catch(Exception e){                }            }        });        service.execute(new Runnable(){            public void run() {                try {                    String data1 = "lhm";                    System.out.println("線程" + Thread.currentThread().getName() +                            "正在把數據" + data1 +"換出去");                    Thread.sleep((long)(Math.random()*10000));                    String data2 = (String)exchanger.exchange(data1);                    System.out.println("線程" + Thread.currentThread().getName() +                            "換回的數據爲" + data2);                }catch(Exception e){                }            }        });    }}