Rudimentäre UI eingefügt.

ImmoMApp/src/gui/MainMenu.java

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+package gui;
+
+import java.awt.event.ActionEvent;
+
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+import facade.ImmoMApp;
+
+public class MainMenu extends JFrame {
+	private ImmoMApp app;
+	
+	public static void main(String[] args) {
+		new MainMenu();
+	}
+	
+	MainMenu() {
+		app = new ImmoMApp();
+		
+		this.setTitle("ImmoMApp");
+		this.setSize(300, 250);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		
+		JPanel buttons = new JPanel();
+		buttons.setLayout(new BoxLayout(buttons, BoxLayout.Y_AXIS));
+		
+		JButton jb1 = new JButton("Mietgesuch anlegen");
+		jb1.addActionListener((ActionEvent e) -> {
+			new MietgesuchAnlegenUI(app);
+		});
+		
+		JButton jb2 = new JButton("Mietgesuche anzeigen");
+		jb2.addActionListener((ActionEvent e) -> {
+			new MietgesucheAnzeigenUI(app);
+		});
+		
+		JButton jb3 = new JButton("Beenden");
+		
+		buttons.add(new JLabel(" "));
+		buttons.add(jb1);
+		buttons.add(jb2);
+		
+		this.add(new JLabel("Willkommen bei der ImmoMApp"), "North");
+		this.add(buttons, "Center");
+		this.add(jb3, "South");
+		
+		this.setVisible(true);
+	}
+
+}

ImmoMApp/src/gui/MietgesuchAnlegenUI.java

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+package gui;
+
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+
+import facade.ImmoMApp;
+
+public class MietgesuchAnlegenUI extends JFrame {
+	private ImmoMApp app;
+	
+	private JTextField zimmer;
+	private JTextField qm;
+	private JTextField miete;
+	private JTextField ort;
+	private JTextArea text;
+	private JTextField mail;
+	
+	public MietgesuchAnlegenUI(ImmoMApp app) {
+		this.app = app;
+		
+		this.setTitle("ImmoMApp: Mietgesuch anlegen");
+		this.setSize(400, 350);
+		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+		
+		JPanel inputs = new JPanel();
+		inputs.setLayout(new BoxLayout(inputs, BoxLayout.Y_AXIS));
+		
+		JPanel container = new JPanel();
+		container.add(new JLabel("Zimmer (+ KB): "));
+		container.add(zimmer = new JTextField(5));
+		inputs.add(container);
+		
+		container = new JPanel();
+		container.add(new JLabel("Größe (qm): "));
+		container.add(qm = new JTextField(5));
+		inputs.add(container);
+		
+		container = new JPanel();
+		container.add(new JLabel("Miete (EUR): "));
+		container.add(miete = new JTextField(5));
+		inputs.add(container);
+		
+		container = new JPanel();
+		container.add(new JLabel("Ort: "));
+		container.add(ort = new JTextField(24));
+		inputs.add(container);
+		
+		container = new JPanel();
+		container.add(new JLabel("Beschreibung: "));
+		container.add(text = new JTextArea(5, 24));
+		inputs.add(container);
+		
+		container = new JPanel();
+		container.add(new JLabel("Mail-Adresse: "));
+		container.add(mail = new JTextField(24));
+		inputs.add(container);
+		
+		this.add(inputs, "Center");
+		
+		JPanel buttons = new JPanel();
+		
+		JButton cancel = new JButton("Verwerfen");
+		cancel.addActionListener(e -> this.dispose());
+		
+		JButton ok = new JButton("Speichern");
+		ok.addActionListener(e -> {
+			app.mietgesuchAnlegen(Integer.parseInt(zimmer.getText()), Integer.parseInt(qm.getText()), Integer.parseInt(miete.getText()), ort.getText(), text.getText(), mail.getText());
+			JOptionPane.showMessageDialog(this, "Mietgesuch angelegt.");
+		});
+		
+		buttons.add(cancel);
+		buttons.add(ok);
+		
+		this.add(buttons, "South");
+		
+		this.setVisible(true);
+	}
+
+}

ImmoMApp/src/gui/MietgesucheAnzeigenUI.java

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+package gui;
+
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+
+import facade.ImmoMApp;
+
+public class MietgesucheAnzeigenUI extends JFrame {
+	private ImmoMApp app;
+	
+	public MietgesucheAnzeigenUI(ImmoMApp app) {
+		this.app = app;
+		
+		this.setTitle("ImmoMApp: Übersicht Mietgesuche");
+		this.setSize(400, 350);
+		this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+		
+		var mgs = app.mietgesucheAbfragen();
+		
+		JLabel jl = new JLabel(mgs.length + " Mietgesuch" + (mgs.length != 1? "e":"") + " verfügbar.");
+		this.add(jl, "North");
+		
+		JPanel mietgesuche = new JPanel();
+		mietgesuche.setLayout(new BoxLayout(mietgesuche, BoxLayout.Y_AXIS));
+		
+		for (String s : mgs) {
+			jl = new JLabel(s);
+			mietgesuche.add(jl);
+		}
+		
+		this.add(mietgesuche, "Center");
+		
+		JPanel buttons = new JPanel();
+		
+		JButton ok = new JButton("Schließen");
+		ok.addActionListener(e -> this.dispose());
+		
+		buttons.add(ok);
+		
+		this.add(buttons, "South");
+		
+		this.setVisible(true);
+	}
+
+}