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Java使用另一个线程检查线程的状态(Java checking the status of threads by using another thread)

 我有一个程序，其中一堆线程执行一些任务。 我想知道所有这些线程何时完成，以便我可以用其结果做其他一些事情。 我不想使用像Thread.join这样的东西。 我更喜欢的是另一个线程检查所有这些线程，当它看到它们完成时，它执行一些特殊任务。 关于如何做到这一点的任何想法？ 

I have a program where a bunch of threads carry out some task. I want to know when all these threads are finished so that I can do some other stuff with their results. I don't want to use things like Thread.join. What I prefer is another thread checking on all these threads and when it sees that they are finished, it carries out some special task. Any ideas about how this can be done ?

原文：https://stackoverflow.com/questions/13000446

更新时间：2022-11-06 21:11

最满意答案

 你这样开始：  
int value = 123;
bgw1.RunWorkerAsync(value);  // argument: value,  the int will be boxed
 
 接着  
private void worker_DoWork(object sender, DoWorkEventArgs e) 
{
   int value = (int) e.Argument;   // the 'argument' parameter resurfaces here

   ...

   // and to transport a result back to the main thread
   double result = 0.1 * value;
   e.Result = result;
}


// the Completed handler should follow this pattern 
// for Error and (optionally) Cancellation handling
private void worker_Completed(object sender, RunWorkerCompletedEventArgs e) 
{
  // check error, check cancel, then use result
  if (e.Error != null)
  {
     // handle the error
  }
  else if (e.Cancelled)
  {
     // handle cancellation
  }
  else
  {          
      double result = (double) e.Result;
      // use it on the UI thread
  }
  // general cleanup code, runs when there was an error or not.
}

You start it like this: 
int value = 123;
bgw1.RunWorkerAsync(argument: value);  // the int will be boxed
 
and then  
private void worker_DoWork(object sender, DoWorkEventArgs e) 
{
   int value = (int) e.Argument;   // the 'argument' parameter resurfaces here

   ...

   // and to transport a result back to the main thread
   double result = 0.1 * value;
   e.Result = result;
}


// the Completed handler should follow this pattern 
// for Error and (optionally) Cancellation handling
private void worker_Completed(object sender, RunWorkerCompletedEventArgs e) 
{
  // check error, check cancel, then use result
  if (e.Error != null)
  {
     // handle the error
  }
  else if (e.Cancelled)
  {
     // handle cancellation
  }
  else
  {          
      double result = (double) e.Result;
      // use it on the UI thread
  }
  // general cleanup code, runs when there was an error or not.
}

Java使用另一个线程检查线程的状态(Java checking the status of threads by using another thread)

最满意答案

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