[java] Java Fullscreen Mode and Key Down event

import java.awt.*; 
import java.awt.event.*; // keylistener
import java.awt.image.*; // volatileimage

public final class Test extends Frame
{
	private Graphics dbg;
	private VolatileImage dbImage;
	
	public static void main(String[] args)
	{
		Test test = new Test();
		test.mainloop();
	}
	
	public Test()
	{
		addKeyListener(new myKeyListener());
		
		GraphicsDevice	myDevice = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
		DisplayMode		oldMode = myDevice.getDisplayMode();
		DisplayMode		newMode = new DisplayMode(640, 480, 16, oldMode.getRefreshRate());

		if(myDevice.isFullScreenSupported()) {
			try {
				this.setVisible(false);
				this.dispose();
				this.setUndecorated(true);
				myDevice.setFullScreenWindow(this);
				myDevice.setDisplayMode(newMode);
			}
			catch (Exception e) {
				myDevice.setDisplayMode(oldMode);
               }
		} else {
			System.out.println("Sorry No Fullscreen");
			System.exit(0);
		}
	}
	
	/** Doublebuffer */
	public final void update(Graphics g)
	{
		if (dbImage == null || dbImage.validate(getGraphicsConfiguration()) == VolatileImage.IMAGE_INCOMPATIBLE) {
			dbImage = createVolatileImage(this.getSize().width, this.getSize().height);
			dbg = dbImage.createGraphics();
		}	
		paint(dbg);
		g.drawImage(dbImage, 0, 0, this);
	}
	
	public void paint(Graphics g)
	{
		g.drawString("Hello World", 100, 100);
	}
	
	public void mainloop()
	{	
		while(true) {
			repaint();
		}
	}
	
	class myKeyListener implements KeyListener
	{
		public void keyPressed(java.awt.event.KeyEvent keyEvent)
		{
			int keyCode = keyEvent.getKeyCode();

			switch (keyCode) {
			case KeyEvent.VK_ESCAPE:
				System.exit(0);
				break;
			}
		}
		
		public void keyReleased(java.awt.event.KeyEvent keyEvent) 
		{
		}
		
		public void keyTyped(java.awt.event.KeyEvent keyEvent)
		{
		}
		
	}  // class myKeyListener
}