final commit of the day

PR2Bib/src/domainBib/Bibliothek.java

@@ -1,6 +1,9 @@
 package domainBib;
 
+import java.awt.Component;
 import java.util.ArrayList;
+import javax.swing.JLabel;
+
 import guiBib.*;
 
 public class Bibliothek {
@@ -88,4 +91,24 @@ public class Bibliothek {
 		}
 		return null;
 	}
+
+	public static int bücherLänge() {
+		return bücherListe.size();
+	}
+
+	public static ArrayList<JLabel> buchAuflisten() {
+		ArrayList<JLabel> jlabelList = new ArrayList<>();
+		for(Buch b: bücherListe) {
+			String titel = b.getTitel();
+			int jahr = b.getJahr();
+			String autor = b.getAutor();
+			int kennnummer = b.getKennnummer();
+			JLabel buch = new JLabel("Titel: " + titel
+					+ ", Autor: " + autor
+					+ ", Jahr: " + jahr
+					+ ", Kennnummer: " + kennnummer);
+			jlabelList.add(buch);
+		}
+		return jlabelList;
+	}
 }

PR2Bib/src/guiBib/BibliothekGUI.java

@@ -4,6 +4,7 @@ import javax.swing.*;
 import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.ArrayList;
 
 public class BibliothekGUI extends JFrame implements ActionListener{
 	private static CardLayout cl = new CardLayout();
@@ -39,12 +40,12 @@ public class BibliothekGUI extends JFrame implements ActionListener{
 		bp.add(b1);
 		bp.add(b2);
 		loginPanel.add(bp, BorderLayout.SOUTH);
-		mainPanel.add(loginPanel, "loginPanel");
-		cl.show(mainPanel, "loginPanel");
 		add(mainPanel);
 		setVisible(true);
 		setSize(600, 600);
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		mainPanel.add(loginPanel, "loginPanel");
+		cl.show(mainPanel, "loginPanel");
 	}
 	
 	public static void openAdmin() {
@@ -85,7 +86,29 @@ public class BibliothekGUI extends JFrame implements ActionListener{
 	}
 
 	private static void bookMenu() {
-		// TODO Auto-generated method stub
+		int i = Bibliothek.bücherLänge();
+		if(i == 0) {
+			JPanel buchMenü = new JPanel(new BorderLayout());
+			JLabel text1 = new JLabel("Keine Bücher mehr vorhanden");
+			buchMenü.add(text1, BorderLayout.NORTH);
+			JButton b1 = new JButton("OK");
+			buchMenü.add(b1, BorderLayout.SOUTH);
+			mainPanel.add(buchMenü, "Bücher");
+			cl.show(mainPanel, "Bücher");
+			b1.addActionListener(e -> cl.show(mainPanel, "mediumPanel"));
+		}
+		if(i != 0) {
+			JPanel buchMenü = new JPanel(new GridLayout(i+1, 2, 10, 10));
+			ArrayList<JLabel> jlabelList = Bibliothek.buchAuflisten();
+			for(JLabel j: jlabelList) {
+				buchMenü.add(j);
+			}
+			JButton b1 = new JButton("OK");
+			buchMenü.add(b1, BorderLayout.SOUTH);
+			mainPanel.add(buchMenü, "Bücher");
+			cl.show(mainPanel, "Bücher");
+			b1.addActionListener(e -> cl.show(mainPanel, "mediumPanel"));
+		}
 	}
 	
 	private static void dvdMenu() {