Stop Thread right after one Minute

问题

I have a JButton to invoke my thread. But what I actually want to do is to stop the thread just after the one minute! My actionListener Method is:

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    new Frame2().setVisible(true);
    Thread t=new Thread(new Frame2());

    t.start();
    }

My thread to run for only one minute is as follow:

    public void run(){
    int i;
    while(!Thread.currentThread().isInterrupted()){
        for(i=0;i<=100;i++){

            if(i==100){
            Thread.currentThread().interrupt();
             }
        try {
            Thread.currentThread().sleep(600);
        } catch (InterruptedException ex) {
            System.out.print("THREAD CLOSED");
           return;
        }

    }
        System.out.print("DOING THINGS BLA BLA");
    }

}

The Problem: I have stopped the thread after one minute successfully, but I was not able to do anything desired in it. I just want to know that how can I achieve this in order to run the thread for only one minute and inside the thread I want to do my things! But how? Am I wrong with this approach? If, yes then what should be the right approach?

回答1:

The simplest way to do what you want is to have something like the following:

public void run() {
    long startTime = System.currentTimeMillis();
    while (System.currentTimeMillis() < startTime + 60000) {
        // do something useful
    }
}

"do something useful" should be a fast operation, and your thread will always last slightly longer than 1 minute (1 minute + the time of "do something useful").

Note about your original code: to stop a thread from the thread itself, no need for an interrupt: you just need to return from the run() method.

回答2:

To be sure that your thread will work 1 minute you need to create separate thread for that.

 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
   new Frame2().setVisible(true);
   final Thread t=new Thread(new Frame2());

   t.start();
   new Thread(new Runnable() {
     @Override
     public void run() {
       TimeUnit.SECONDS.sleep(1);
       t.interrupt();
     }
   }).start();
 }

Now regardles of what your "t" thread is doing, it will be killed after 1 minute.

来源：https://stackoverflow.com/questions/16455765/stop-thread-right-after-one-minute

标签

java

multithreading

for-loop

interrupt

interrupt-handling