New to Java

Hi all,

I have an application that needs to run in 800x600 resolution no matter what PC it runs on so I used the following code:

public static void main(String args[]) {
        JFrame windo = new pdtester();
        windo.setVisible(true);
        
     GraphicsDevice device = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();

     /**find out if the device we are using is even capable of
      *supporting full screen*/
     if (device.isFullScreenSupported()) {
      DisplayMode display = new DisplayMode(800,600,32,0);

      try {
        device.setFullScreenWindow(windo);
        device.setDisplayMode(display);
      } catch (Exception e) {
          //exception handling here
      } 
 
 
 }
        
        


    }

it seems to work and the program executes in 800x600 but the problem is the graphics dont seem to refresh and they only show when you scroll over them etc... I assume its something to do with the refresh rate set at zero at present. I've tried 50 and display.REFRESH_RATE_UNKNOWN but I get the same problem.

Any ideas would be appreciated.

Thanks,

John