Made Fullscreen almost working….

CubeControl/Frame.java

 	// Anfang Ereignisprozeduren
 	
 	public void enterFullscreen(ActionEvent evt) {
-		FullscreenWindow fw = new FullscreenWindow(worker);
+		ledView.enterFullscreen();
+		FullscreenWindow fw = new FullscreenWindow(worker, cubeCanvas, ledView);
 	}
 	
 	public void editA_ActionPerformed(ActionEvent evt) {

CubeControl/FullscreenWindow.java

 	private Container cp = getContentPane();
 	private cubeWorker worker;
 	private JButton exitButton;
+	private Canvas3D canvas;
+	private Led3D led;
 	private int width;
 	private int height;
 	
-	public FullscreenWindow (cubeWorker cw) {
+	public FullscreenWindow (cubeWorker cw, Canvas3D cv, Led3D ledview) {
 		//Basic layout stuff
 		this.setUndecorated(true);
 		Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
 		worker = cw;
 		width = d.width;
 		height = d.height;
+		canvas = cv;
+		led = ledview;
 		exitButton = new JButton("Exit Fullscreen");
 		exitButton.setBounds(width-150, height-25, 150, 25);
 		exitButton.addActionListener(new ActionListener() {
 			public void actionPerformed(ActionEvent evt) {
 				dispose();
+				led.leaveFullscreen();
 			}
 		});
+		
+		canvas.setBounds(0,0, width, height-50);
+
+		
 		cp.add(exitButton);
+		cp.add(canvas);
 		
 		setVisible(true);
 	}
+
 }

CubeControl/Led3D.java

 import javax.vecmath.*;
 import com.sun.j3d.utils.behaviors.mouse.*;
 import com.sun.j3d.utils.image.TextureLoader;
+import java.awt.Toolkit;
 
 /**
  * This class is responsible for displaying the 3D View of our Cube.
 	private static Material redMat = new Material(
 			new Color3f(1.0f, 0.0f, 0.0f), new Color3f(1.0f, 0.0f, 0.0f),
 			new Color3f(1.0f, 0.0f, 0.0f), new Color3f(1.0f, 0.0f, 0.0f), 64.0f);
+	private Background background;
+	private Background fullscreenBackground;
 
 	/**
 	 * @param canv The Canvas3D we render our cube in
 		beh3.setSchedulingBounds(boundBox);
 		transGroup.addChild(beh3);
 
-		group.addChild(createBackground());
+		background = createBackground();
+		fullscreenBackground = createFullscreenBackground();
+		group.addChild(background);
+		
+		
 
 		// Add all our led sphares to the universe
 		for (int x = 0; x < 8; x++) {
 				100.0));
 		return bg;
 	}
+	
+	//create fullscreen background
+	private Background createFullscreenBackground() {
+		Background bg = new Background();
+		int radius = Toolkit.getDefaultToolkit().getScreenSize().width;
+		bg.setApplicationBounds(new BoundingSphere(new Point3d(0.0, 0.0, 0.0), radius));
+		return bg;
+
+	}
+	
+	public void enterFullscreen() {
+
+		group.removeChild(background);
+		group.addChild(fullscreenBackground);
+		
+	}
+	
+	public void leaveFullscreen() {
+		group.removeChild(fullscreenBackground);
+		group.addChild(background);
+		
+	}
 }