automatically switch to fullscreen

src/de/miaurizius/jgame2d/core/Boot.java

@@ -6,12 +6,14 @@ import java.util.logging.Logger;
 public class Boot {
 
     public static final Logger logger = Logger.getLogger("JDGame2D");
+    public static JFrame window;
 
     static void main() {
-        JFrame window = new JFrame();
+        window = new JFrame();
         window.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
         window.setResizable(false);
         window.setTitle("JGame2D");
+        window.setUndecorated(true);
 
         GamePanel gamePanel = new GamePanel();
         window.add(gamePanel);

src/de/miaurizius/jgame2d/core/GamePanel.java

@@ -222,6 +222,16 @@ public class GamePanel extends JPanel implements Runnable {
 
         tempScreen = new BufferedImage(screenWidth, screenHeight, BufferedImage.TYPE_INT_RGB);
         fg2 = (Graphics2D) tempScreen.getGraphics();
+
+        setFullscreen();
+    }
+    public void setFullscreen() {
+        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+        GraphicsDevice gd = ge.getDefaultScreenDevice();
+        gd.setFullScreenWindow(Boot.window);
+
+        fScreenWidth = Boot.window.getWidth();
+        fScreenHeight = Boot.window.getHeight();
     }
 
 }