added draw time and debug mode

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

@@ -6,6 +6,8 @@ import de.miaurizius.jgame2d.tile.TileManager;
 
 import javax.swing.*;
 import java.awt.*;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 public class GamePanel extends JPanel implements Runnable {
 
@@ -96,11 +98,28 @@ public class GamePanel extends JPanel implements Runnable {
         super.paintComponent(graphics);
         Graphics2D graphics2d = (Graphics2D) graphics;
 
+        // DEBUG
+        long drawStart = 0;
+        drawStart = System.nanoTime();
+
         //Draw all components
         tileM.draw(graphics2d);
         for (SuperObject superObject : obj) if (superObject != null) superObject.draw(graphics2d, this);
         player.draw(graphics2d);
         ui.draw(graphics2d);
+
+        long drawEnd = System.nanoTime();
+        long passed = drawEnd - drawStart;
+
+        // DEBUG
+        if(keyH.checkDrawTime) {
+            graphics2d.setColor(Color.white);
+            graphics2d.drawString("Draw Time: " + passed, 10, 400);
+            System.out.println("Draw Time: " + passed);
+            Logger.getLogger("DEBUG").log(Level.FINE, "Draw Time: " + passed);
+        }
+
+        // END
         graphics.dispose();
     }