线程结束监听器。 Java的 [英] Thread end listener. Java

问题描述

Java中是否有任何监听器可以处理某些线程已经结束？
这样的事情：

Are there any Listeners in Java to handle that some thread have been ended? Something like this:

Future<String> test = workerPool.submit(new TestCalalble());
test.addActionListener(new ActionListener()               
   {                                                         
    public void actionEnd(ActionEvent e)               
    {                                                        
        txt1.setText("Button1 clicked");                        
    }                                                        
   });

我知道，这样处理是不可能的，但是我希望在某些线程时得到通知结束。

I know, that it is impossible to deal like this, but I want to be notified when some thread ended.

通常我用这个Timer类来检查每个Future的状态。但这不是很好的方式。
谢谢

Usually I used for this Timer class with checking state of each Future. but it is not pretty way. Thanks

推荐答案

CompletionService 。

CompletionService<Result> ecs
       = new ExecutorCompletionService<Result>(e);
ecs.submit(new TestCallable());
if (ecs.take().get() != null) {
    // on finish
}

另一种方法是使用 ListenableFuture 来自Guava。

Another alternative is to use ListenableFuture from Guava.

代码示例：

ListenableFuture future = Futures.makeListenable(test);
future.addListener(new Runnable() {
 public void run() {
   System.out.println("Operation Complete.");
   try {
     System.out.println("Result: " + future.get());
   } catch (Exception e) {
     System.out.println("Error: " + e.message());
   }
 }
}, exec);

就个人而言，我更喜欢Guava解决方案。

Personally, I like Guava solution better.

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