.idea/libraries/jlayer_1_0_3.xml

@@ -2,6 +2,7 @@
   <library name="jlayer-1.0.3">
     <CLASSES>
       <root url="jar://$USER_HOME$/Downloads/jlayer-master/jlayer-master/target/jlayer-1.0.3.jar!/" />
+      <root url="jar://$USER_HOME$/Downloads/jlayer-1.0.3.jar!/" />
     </CLASSES>
     <JAVADOC />
     <SOURCES />

.idea/vcs.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
   </component>
 </project>

src/HalloSchiffeVersenken.java

@@ -1,6 +1,7 @@
 public class HalloSchiffeVersenken {
 
     public static void main(String[] args) throws InterruptedException {
+        MainMenu mainMenu = new MainMenu();
 
         System.out.println("HelloSchiffeVersenekn");
 

src/MainMenu.java

@@ -0,0 +1,28 @@
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.*;
+import javax.swing.JFrame;
+import javax.swing.*;
+
+public class MainMenu implements ActionListener {
+    JFrame frame = new JFrame();
+    JButton startButton = new JButton("Start");
+    JLabel text = new JLabel("Studium versenken");
+
+    MainMenu(){
+        startButton.setBounds(100,200,200,50);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setSize(500,500);
+        frame.setLayout(null);
+        frame.setVisible(true);
+        frame.add(startButton);
+        frame.add(text);
+        frame.setLocationRelativeTo(null);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+
+    }
+}
+