refactoring: extract Methods for Interface

src/main/java/Gui/GuiInterface.java

@@ -0,0 +1,13 @@
+package Gui;
+
+public interface GuiInterface {
+
+	void StartMainMenu();
+
+	void createFrame();
+
+	void createButtons();
+
+	void createPanel();
+
+}

src/main/java/Gui/gui.java

@@ -10,18 +10,20 @@ import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 
-public class gui {
+public class gui implements GuiInterface {
 	   public static JFrame Frame;
 	   public static JButton StartBtn, CloseBtn;
 	   public static JPanel Panel;
 	   public static JLabel Label;
 	   public static int width = 800, height = 600;
 
+	    @Override
 		public void StartMainMenu() {
 	    	createFrame();
 	    	createButtons();
 	    	createPanel();
 	    }
+	    @Override
 		public void createFrame(){
 	    	Frame = new JFrame("MiniGames");
 	    	Frame.setSize(width,height);
@@ -30,6 +32,7 @@ public class gui {
 	    	Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 	    }
 	    
+		@Override
 		public void createButtons() {
 			StartBtn = new JButton("Starte Spiel");
 			StartBtn.addActionListener(new StartGameGui());
@@ -38,6 +41,7 @@ public class gui {
 
 
 		}
+		@Override
 		public void createPanel() {
 			Panel = new JPanel();
 			Panel.setSize(width,height);

src/main/java/game/runGame.java

@@ -39,7 +39,6 @@ public class runGame {
 		return Numlines+1;
 
     }
-    
     public static String[] readFile(String Path) {
 		BufferedReader reader;
 		String[] Arr = new String[lines];

src/main/java/main.java

@@ -1,11 +1,12 @@
 
+import Gui.GuiInterface;
 import Gui.gui;
 
 public class main {
 
 	public static void main(String[] args) {
 		// TODO Auto-generated method stub
-		gui Mainmenu = new gui();
+		GuiInterface Mainmenu = new gui();
 		Mainmenu.StartMainMenu();
 	}
 

src/test/java/Gui/guiTest.java

@@ -9,7 +9,7 @@ class guiTest {
 
 	@BeforeAll
 	static void setUp() {
-		gui StartGui = new gui();	
+		GuiInterface StartGui = new gui();	
 		StartGui.StartMainMenu();
 	}