Problem responding to events in fullscreen mode

Question

I made a fullscreen game and I'm trying to get it to respond to the mouse or keyboard input. The problem is it only responds a few second after I press the button. Does anyone know how I could speed up the response? All my code is posted below.
EDIT: I did some experimenting and it looks like device.isDisplayChangeSupported() returns false and the resolution never gets changed to 800x600 (I haden't noticed this before since I was flooding the whole screen with black). I also took a look at the resolutions I could manually set the monitor to and it only shows 1280x800 and 1024x768. This is under Ubuntu Linux. Even though I haven't run this program under my Windows installation, I'm sure I can change to 800x600 resolution there since I've done it manually and through other programs. Does anybody know any solutions to this? I will probably try running the program under Windows and see what happens.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferStrategy;
public class LostHaven implements KeyListener, MouseListener
     private static DisplayMode[] BEST_DISPLAY_MODES = new DisplayMode[] {
        new DisplayMode(800, 600, 32, 0),
        new DisplayMode(800, 600, 16, 0),
        new DisplayMode(800, 600, 8, 0)
    Frame mainFrame;
    boolean done;
    boolean pressed;
    public LostHaven(GraphicsDevice device)
        try
            GraphicsConfiguration gc = device.getDefaultConfiguration();
            mainFrame = new Frame(gc);
            mainFrame.setUndecorated(true);
            mainFrame.setIgnoreRepaint(true);
            device.setFullScreenWindow(mainFrame);
            if (device.isDisplayChangeSupported())
                chooseBestDisplayMode(device);
            mainFrame.addMouseListener(this);
            mainFrame.addKeyListener(this);
            mainFrame.createBufferStrategy(2);
            BufferStrategy bufferStrategy = mainFrame.getBufferStrategy();
            done = false;
            pressed = false;
            while (!done)
                Graphics g = bufferStrategy.getDrawGraphics();
                render(g);
                g.dispose();
                bufferStrategy.show();
        catch (Exception e)
            e.printStackTrace();
        finally
            device.setFullScreenWindow(null);
    private void render(Graphics g)
         Rectangle bounds = mainFrame.getBounds();
         g.setColor(Color.black);
        g.fillRect(0,0,bounds.width, bounds.height);
        g.setColor(Color.red);
        g.fillRect(bounds.width*1/4, bounds.height*1/4, bounds.width*2/4, bounds.height*2/4);
        if(pressed)
             g.drawString("mouse pressed", 0, 15);
    private static DisplayMode getBestDisplayMode(GraphicsDevice device)
        for (int x = 0; x < BEST_DISPLAY_MODES.length; x++)
            DisplayMode[] modes = device.getDisplayModes();
            for (int i = 0; i < modes.length; i++)
                if (modes.getWidth() == BEST_DISPLAY_MODES[x].getWidth()
&& modes[i].getHeight() == BEST_DISPLAY_MODES[x].getHeight()
&& modes[i].getBitDepth() == BEST_DISPLAY_MODES[x].getBitDepth()
return BEST_DISPLAY_MODES[x];
return null;
public static void chooseBestDisplayMode(GraphicsDevice device)
DisplayMode best = getBestDisplayMode(device);
if (best != null)
device.setDisplayMode(best);
     public void mousePressed(MouseEvent e)
     pressed = true;
     public void mouseReleased(MouseEvent e)
     public void mouseEntered(MouseEvent e)
     public void mouseExited(MouseEvent e)
     public void mouseClicked(MouseEvent e)
     public void keyTyped(KeyEvent e)
     public void keyPressed(KeyEvent e)
          if(e.getKeyCode() == KeyEvent.VK_ESCAPE)
               done = true;
     public void keyReleased(KeyEvent e)
     public static void main(String[] args)
          try
GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice device = env.getDefaultScreenDevice();
LostHaven gameWindow = new LostHaven(device);
          catch (Exception e)
               e.printStackTrace();
System.exit(0);
Message was edited by:
Japheth

Answer 1

Do you get this behavior when it's not fullscreen (and the rest is the same)?