Timer in java using Eclipse

Question

I\'m trying to do a little program in Java using Eclipse, and I\'m a little bit lost.

Could anybody explain me (in a \"for dummies way\") what do I have to do for repain

Answer 1

Why not use the timer functionality that is built into the SWT Display class?

private void activateTimer(final Display display)
{
    display.timerExec(
        1000,
        new Runnable() {
            public void run() {
                whatever.redraw();
                // If you want it to repeat:
                display.timerExec(1000, this);
            }
        });
}

Answer 2

you have to split that to the separete methods, better would be using javax.swing.Action instead of ActionListener

private void activateTimer(){
    myTimer = new Timer(1000, myAction);
    myTimer.start();
}

private Action myAction = new AbstractAction() {

    private static final long serialVersionUID = 1L;

    @Override
    public void actionPerformed(ActionEvent e) {
          whatever.redraw();
    }
};

Answer 3

This page may be useful.

If you use SWT, do it in SWT way :)

EDIT:

The problem is widget should be updated by eclipse's thread. Try this code.

Job job = new Job("My Job") {
@Override
protected IStatus run(IProgressMonitor monitor) {
    Display.getDefault().asyncExec(new Runnable() {
        @Override
        public void run() {
            while(true)
            {
                Thread.sleep(1000);
                whatever.redraw();
            }
        }
    });
    return Status.OK_STATUS;
}
};
job.schedule();