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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<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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