added register new user feature

PR2Bib/src/domainBib/Bibliothek.java

@@ -510,6 +510,22 @@ public class Bibliothek {
 		}
 		return jlabelList;
 	}
+
+	public static int getNewKennnummer() {
+		int newKennnummer = 0;
+		for(Kunde k: kundenListe) {
+			int nummer = k.getKennnummer();
+			if(nummer > newKennnummer) {
+				newKennnummer = nummer;
+			}
+		}
+		newKennnummer += 1;
+		return newKennnummer;
+	}
+
+	public static void addCustomer(Kunde k) {
+		kundenListe.add(k);
+	}
 	
 }
 

PR2Bib/src/guiBib/BibliothekGUI.java

@@ -86,8 +86,28 @@ public class BibliothekGUI extends JFrame implements ActionListener{
 	}
 
 	private void nutzerAnlegen() {
-		// TODO Auto-generated method stub
+		JPanel registerMenu = new JPanel(new BorderLayout());
-		
+		int newKennnummer = Bibliothek.getNewKennnummer();
+		JLabel text0 = new JLabel("Ihre Kennnummmer wird " + newKennnummer + " sein.");
+		JCheckBox studentOrNot = new JCheckBox("Sind Sie Student? Falls ja bitte anklicken."); 
+		registerMenu.add(text0, BorderLayout.NORTH);
+		registerMenu.add(studentOrNot, BorderLayout.CENTER);
+		final boolean[] isStudent = {false};
+		studentOrNot.addActionListener(e -> isStudent[0] = studentOrNot.isSelected());
+		JPanel bg = new JPanel(new GridLayout(1,2,10,10));
+		JButton b2 = new JButton("OK");
+		b2.addActionListener(e -> {
+			Kunde k = new Kunde(isStudent[0], newKennnummer);
+			Bibliothek.addCustomer(k);
+			cl.show(mainPanel, "loginPanel");
+		});
+		JButton b1 = new JButton("Abbrechen");
+		b1.addActionListener(e -> cl.show(mainPanel, "loginPanel"));
+		bg.add(b1);
+		bg.add(b2);
+		registerMenu.add(bg, BorderLayout.SOUTH);
+		mainPanel.add(registerMenu, "registerMenu");
+		cl.show(mainPanel, "registerMenu");
 	}
 
 	private static void openAdmin() {