refactoring: Add Buttons to a new Panel instead of the Frame

src/main/java/Gui/gui.java

@@ -1,11 +1,15 @@
 package Gui;
 
+import java.awt.GridBagLayout;
+
 import javax.swing.JButton;
 import javax.swing.JFrame;
+import javax.swing.JPanel;
 
 public class gui {
 	   JFrame jf;
 	   JButton StartBtn, CloseBtn;
+		JPanel Panel;
 
 	    public static int width = 800, height = 600;
 
@@ -18,10 +22,16 @@ public class gui {
 			jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 			StartBtn = new JButton("Starte Spiel");
 			StartBtn.setSize(300,100);
-			jf.add(StartBtn);
 			CloseBtn = new JButton("Schlieen");
 			CloseBtn.setSize(300,100);
-			jf.add(CloseBtn);
+			Panel = new JPanel();
+			Panel.setSize(width,height);
+			Panel.setLayout(new GridBagLayout());
+			Panel.add(StartBtn);
+			Panel.add(CloseBtn);
+			jf.add(Panel);
+			Panel.setVisible(true);
+			
 	    }
 
 }