Recurring Countdown Timer in Java

Question

I\'m trying to implement a countdown timer into a pre-existing public class and I have a few questions.

An overview: I want to have a timer within a program that counts

Answer 1

If you need to update your GUI better to use SwingWorker http://en.wikipedia.org/wiki/SwingWorker I would write something like this:

SwingWorker timer = new SwingWorker() {
    Integer timer=60;
    @Override
    protected String doInBackground() throws Exception {
      //update guiModel
      //label.setText(timer.toString());
        while(timer>0){
        Thread.sleep(1000);
        timer--;
        }
        return null;
    }
    @Override
     public void done(){
         System.exit(0);
     } 
};

JButton restart = new JButton(){
    {
  addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                timer.cancel(true);
                timer.execute();
            }
        });      
    }
};