线程之间数据交换

Posted 2020-10-21 weishao-lsv

场景：两个线程

功能：两个线程之间的数据交换

 

案例：

　　

public class ExchangeTest {
    
    public static void main(String[] args) {
        
        ExecutorService service = Executors.newFixedThreadPool(2);
        final Exchanger exchanger = new Exchanger();
        
        service.execute(new Runnable(){
            public void run() {
                try {                

                    String money = "美钞";
                    System.out.println("买方" + Thread.currentThread().getName() + "想把" + money +"换出去");
                    Thread.sleep((long)(Math.random()*10000));
                    String product = (String)exchanger.exchange(money);  
                    System.out.println("买方" + Thread.currentThread().getName() +"买回的是" + product);
                }catch(Exception e){
                    System.out.println("交易失败...");
                }
            }    
        });
        service.execute(new Runnable(){
            public void run() {
                try {                
                    String product = "AK-47";
                    System.out.println("卖方" + Thread.currentThread().getName() +"正在把" + product +"卖出去");
                    Thread.sleep((long)(Math.random()*10000));                    
                    String money = (String)exchanger.exchange(product); 
                    System.out.println("卖方" + Thread.currentThread().getName() + "拿到" + money);
                }catch(Exception e){
                    System.out.println("交易失败...");
                }                
            }    
        });        
        service.shutdown();
    }
}


结果输出：
　　
　　　买方pool-1-thread-1想把美钞换出去

　　　　卖方pool-1-thread-2正在把AK-47卖出去
　　　　卖方pool-1-thread-2拿到美钞
　　　　买方pool-1-thread-1买回的是AK-47