Re: Thread problems with javax.swing.Timer?

From:

Nigel Wade <nmw@ion.le.ac.uk>

Newsgroups:

comp.lang.java.gui

Date:

Fri, 08 May 2009 16:46:22 +0100

Message-ID:

<gu1k4f$r9v$1@south.jnrs.ja.net>

Giampiero Mughini wrote:

Sabine Dinis Blochberger ha scritto:

A compilable example would help [1].

My guess is that whatever your timer does, should go into an invokeLater
block. See EventQueue [2]. Example:

    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
     // your code
        }
    });

protected void startCounter() {

              if (timer!=null)
                      timer.stop();

              timer = new Timer(1000, new ActionListener() {
                      public void actionPerformed(ActionEvent arg0) {
                                      updateDisplay();
                      }
              });
              timer.setInitialDelay(0);
              timer.start();

      }

Should I put the call to the method updateDisplay() into an invokeLater
block?

No need. It's within the actionPerfomed() method of an ActionListener. This will
be run by the EDT when the requisite action is encountered, i.e. when the Timer
fires.

See:

http://java.sun.com/docs/books/tutorial/uiswing/misc/timer.html

--
Nigel Wade