Java中的计时器问题-设置setRepeat（false）时时间未停止

Question

I'm hoping someone could help me fix this issue that I'm having with timers. When timer.start() is run, the timer starts. however, it seems to repeat endlessly.

I just need the timer to execute once. How can I achieve this if timer.setRepeats(false) is not working?

     ActionListener updatePane = new ActionListener() {

     public void actionPerformed(ActionEvent ae) {

     try {
            msgPaneDoc.insertString(msgPaneDoc.getLength(), "CLICK",  
                    msgPaneDoc.getStyle("bold_style")); 
         } catch (BadLocationException ex) {    
           }}}; 

        Timer timer = new Timer(3000,updatePane); 

         timer.start();
         timer.setRepeats(false);

Answer 1

You have call it from inside the The Event Dispatch Thread .

Try with SwingUtilities.invokeLater() or EventQueue.invokeLater()

Sample code:

SwingUtilities.invokeLater(new Runnable() {

    @Override
    public void run() {
        ActionListener actionListener = new ActionListener() {

            public void actionPerformed(ActionEvent ae) {
                System.out.println("Hello");
            }
        };
        Timer timer = new Timer(1000, actionListener);
        timer.start();
        timer.setRepeats(false);
    }
});