diff --git a/id/blatt5/code/mvc/Controller.java b/id/blatt5/code/mvc/Controller.java
new file mode 100644
index 0000000..b624b42
--- /dev/null
+++ b/id/blatt5/code/mvc/Controller.java
@@ -0,0 +1,64 @@
+import javax.swing.JFrame;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.ChangeEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+
+public class Controller {
+    private Temperature _temperature;
+    private UserInterface _ui;
+    private JFrame _frame;
+
+    public Controller() {
+        _temperature = new Temperature();
+        _ui = new UserInterface(this);
+        _frame = _ui.getUIFrame();
+        _temperature.addObserver(_ui);
+        _ui.initGUI();
+        registriereUIAktionen();
+        _ui.zeigeFenster();
+    }
+
+    private void registriereUIAktionen() {
+        _ui.getCelsius().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                _ui.getCelsiusSlider().setValue(Integer.valueOf(_ui.getCelsius().getText()));
+            }
+        });
+
+        _ui.getCelsiusSlider().addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent changeEvent) {
+                int celsius = _ui.getCelsiusSlider().getValue();
+                _ui.getCelsius().setText(Integer.toString(celsius));
+            }
+        });
+
+        _ui.getFahrenheit().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                _ui.getFahrenheitSlider().setValue(Integer.valueOf(_ui.getFahrenheit().getText()));
+            }
+        });
+
+        _ui.getFahrenheitSlider().addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent changeEvent) {
+                int fahrenheit = _ui.getFahrenheitSlider().getValue();
+                _ui.getFahrenheit().setText(Integer.toString(fahrenheit));
+            }
+        });
+
+        _ui.getCelsiusButton().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                int celsius = _ui.getCelsiusSlider().getValue();
+                _temperature.setCelsiusTemperature(celsius);
+            }
+        });
+
+        _ui.getFahrenheitButton().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                int fahrenheit = _ui.getFahrenheitSlider().getValue();
+                _temperature.setFahrenheitTemperature(fahrenheit);
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/mvc/MANIFEST.MF b/id/blatt5/code/mvc/MANIFEST.MF
new file mode 100644
index 0000000..5ee19cb
--- /dev/null
+++ b/id/blatt5/code/mvc/MANIFEST.MF
@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: Main
+
diff --git a/id/blatt5/code/mvc/Main.java b/id/blatt5/code/mvc/Main.java
new file mode 100644
index 0000000..975b5dd
--- /dev/null
+++ b/id/blatt5/code/mvc/Main.java
@@ -0,0 +1,27 @@
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+
+public class Main {
+    public static void main(String[] argv) {
+        SwingUtilities.invokeLater(new Runnable()
+        {
+            @Override
+            public void run()
+            {
+                try
+                {
+                    UIManager.setLookAndFeel(UIManager
+                            .getSystemLookAndFeelClassName());
+                }
+                catch (ClassNotFoundException | InstantiationException
+                        | IllegalAccessException
+                        | UnsupportedLookAndFeelException e)
+                {
+                    e.printStackTrace();
+                }
+                new Controller();
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/mvc/Temperature.java b/id/blatt5/code/mvc/Temperature.java
new file mode 100644
index 0000000..0d3e41e
--- /dev/null
+++ b/id/blatt5/code/mvc/Temperature.java
@@ -0,0 +1,41 @@
+import java.util.Observable;
+
+public class Temperature extends Observable {
+    private int _celsius;
+    private int _fahrenheit;
+
+    public Temperature() {
+        _celsius = 0;
+        _fahrenheit = 32;
+    }
+
+    public int getCelsiusTemperature() {
+        return _celsius;
+    }
+
+    public int getFahrenheitTemperature() {
+        return _fahrenheit;        
+    }
+
+    public void setCelsiusTemperature(int celsius) {
+        _celsius = celsius;
+        _fahrenheit = convertToFahrenheit(_celsius);
+        setChanged();
+        notifyObservers();
+    }
+
+    public void setFahrenheitTemperature(int fahrenheit) {
+        _fahrenheit = fahrenheit;
+        _celsius = convertToCelsius(fahrenheit);
+        setChanged();
+        notifyObservers();
+    }
+
+    private int convertToFahrenheit(int celsius) {
+        return Math.round(1.8f * celsius + 32);
+    }
+
+    private int convertToCelsius(int fahrenheit) {
+        return Math.round(5.0f / 9.0f * (fahrenheit - 32));
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/mvc/UserInterface.java b/id/blatt5/code/mvc/UserInterface.java
new file mode 100644
index 0000000..8610181
--- /dev/null
+++ b/id/blatt5/code/mvc/UserInterface.java
@@ -0,0 +1,157 @@
+import java.awt.GridLayout;
+import java.awt.BorderLayout;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JLabel;
+import javax.swing.JSlider;
+import javax.swing.JTextField;
+import javax.swing.WindowConstants;
+import java.util.Observer;
+import java.util.Observable;
+
+class UserInterface implements Observer {
+    public static final String NAME = "Temperature converter";
+
+    private Controller _controller;
+
+    private JFrame __frame;
+    private JPanel __panel;
+    private JTextField __celsius;
+    private JTextField __fahrenheit;
+    private JSlider __celsiusSlider;
+    private JSlider __fahrenheitSlider;
+    private JButton __convertCelsiusButton;
+    private JButton __convertFahrenheitButton;
+
+    private GridLayout __layout;
+
+    private static final int CELSIUS_MIN = -18;
+    private static final int CELSIUS_MAX = 100;
+    private static final int CELSIUS_INIT = 0;
+
+    private static final int FAHRENHEIT_MIN = 0;
+    private static final int FAHRENHEIT_MAX = 212;
+    private static final int FAHRENHEIT_INIT = 32;
+
+    public UserInterface(Controller controller) {
+        _controller = controller;
+        __frame = new JFrame();
+        __frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        __frame.setTitle(NAME);
+    }
+
+    public void update(Observable o, Object arg) {
+        if (o instanceof Temperature) {
+            Temperature temperature = (Temperature) o;
+            int celsius = temperature.getCelsiusTemperature();
+            int fahrenheit = temperature.getFahrenheitTemperature();
+            __celsius.setText(Integer.toString(celsius));
+            __celsiusSlider.setValue(celsius);
+            __fahrenheit.setText(Integer.toString(fahrenheit));
+            __fahrenheitSlider.setValue(fahrenheit);
+        }
+    }
+
+    public void initGUI() {
+        __panel = new JPanel();
+        __layout = new GridLayout(1, 3);
+        __panel.setLayout(__layout);
+
+        JPanel celsiusPanel = new JPanel();
+        BoxLayout boxLayoutCelsius = new BoxLayout(celsiusPanel, BoxLayout.Y_AXIS);
+        celsiusPanel.setLayout(boxLayoutCelsius);
+
+        __celsius = new JTextField();
+        __celsius.setText(Integer.toString(CELSIUS_INIT));
+        __celsiusSlider = new JSlider(JSlider.VERTICAL, CELSIUS_MIN, CELSIUS_MAX, CELSIUS_INIT);
+        celsiusPanel.add(__celsius);
+        celsiusPanel.add(__celsiusSlider);
+        celsiusPanel.add(new JLabel("Celsius"));
+
+        JPanel fahrenheitPanel = new JPanel();
+        BoxLayout boxLayoutFahrenheit = new BoxLayout(fahrenheitPanel, BoxLayout.Y_AXIS);
+        fahrenheitPanel.setLayout(boxLayoutFahrenheit);
+
+        __fahrenheit = new JTextField();
+        __fahrenheit.setText(Integer.toString(FAHRENHEIT_INIT));
+        __fahrenheitSlider = new JSlider(JSlider.VERTICAL, FAHRENHEIT_MIN, FAHRENHEIT_MAX, FAHRENHEIT_INIT);
+        fahrenheitPanel.add(__fahrenheit);
+        fahrenheitPanel.add(__fahrenheitSlider);
+        fahrenheitPanel.add(new JLabel("Fahrenheit"));
+
+        JPanel middlePanel = new JPanel();
+        middlePanel.setLayout(new BoxLayout(middlePanel, BoxLayout.Y_AXIS));
+        __convertCelsiusButton = new JButton("Convert to Fahrenheit");
+        __convertFahrenheitButton = new JButton("Convert to Celsius");
+        middlePanel.add(__convertCelsiusButton);
+        middlePanel.add(__convertFahrenheitButton);
+
+        __panel.add(celsiusPanel);
+        __panel.add(middlePanel);
+        __panel.add(fahrenheitPanel);        
+
+        __frame.getContentPane().add(__panel, BorderLayout.CENTER);
+        __frame.pack();
+    }
+
+    /**
+     * Gibt das JFrame der UI zurück.
+     * 
+     * @return Das JFrame der UI.
+     */
+    public JFrame getUIFrame()
+    {
+        return __frame;
+    }
+
+    /**
+     * Zeigt das Hauptfenster an.
+     */
+    public void zeigeFenster()
+    {
+        __frame.setLocationRelativeTo(null);
+        __frame.setVisible(true);
+    }
+
+    /**
+     * Schließt das Fenster.
+     */
+    public void schliesseFenster()
+    {
+        __frame.dispose();
+    }
+
+    public JTextField getCelsius() {
+        return __celsius;
+    }
+
+    public JTextField getFahrenheit() {
+        return __fahrenheit;
+    }
+
+    public JSlider getCelsiusSlider() {
+        return __celsiusSlider;
+    }
+
+    public JSlider getFahrenheitSlider() {
+        return __fahrenheitSlider;
+    }
+    
+    public JButton getCelsiusButton() {
+        return __convertCelsiusButton;
+    }
+
+    public JButton getFahrenheitButton() {
+        return __convertFahrenheitButton;
+    }
+
+    /**
+     * Aktualisiert das Layout.
+     */
+    private void aktualisiereLayout()
+    {
+        __frame.validate();
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/wam/HauptWerkzeug.java b/id/blatt5/code/wam/HauptWerkzeug.java
new file mode 100644
index 0000000..b35502d
--- /dev/null
+++ b/id/blatt5/code/wam/HauptWerkzeug.java
@@ -0,0 +1,69 @@
+import javax.swing.JFrame;
+import javax.swing.JSlider;
+import javax.swing.JTextField;
+import javax.swing.event.ChangeListener;
+import javax.swing.event.ChangeEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ActionEvent;
+
+public class HauptWerkzeug {
+    private Umrechner __rechner;
+    private HauptWerkzeugUI __ui;
+
+    private JFrame __frame;
+
+    public HauptWerkzeug(Umrechner rechner) {
+        __rechner = rechner;
+        __ui = new HauptWerkzeugUI();
+        __frame = __ui.getUIFrame();
+        __ui.initGUI();
+        registriereUIAktionen();
+        __ui.zeigeFenster();
+    }
+
+    private void registriereUIAktionen() {
+        __ui.getCelsius().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                __ui.getCelsiusSlider().setValue(Integer.valueOf(__ui.getCelsius().getText()));
+            }
+        });
+
+        __ui.getCelsiusSlider().addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent changeEvent) {
+                int celsius = __ui.getCelsiusSlider().getValue();
+                __ui.getCelsius().setText(Integer.toString(celsius));
+            }
+        });
+
+        __ui.getFahrenheit().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                __ui.getFahrenheitSlider().setValue(Integer.valueOf(__ui.getFahrenheit().getText()));
+            }
+        });
+
+        __ui.getFahrenheitSlider().addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent changeEvent) {
+                int fahrenheit = __ui.getFahrenheitSlider().getValue();
+                __ui.getFahrenheit().setText(Integer.toString(fahrenheit));
+            }
+        });
+
+        __ui.getCelsiusButton().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                int celsius = __ui.getCelsiusSlider().getValue();
+                int fahrenheit = __rechner.convertToFahrenheit(celsius);
+                __ui.getFahrenheitSlider().setValue(fahrenheit);
+                __ui.getFahrenheit().setText(Integer.toString(fahrenheit));
+            }
+        });
+
+        __ui.getFahrenheitButton().addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                int fahrenheit = __ui.getFahrenheitSlider().getValue();
+                int celsius = __rechner.convertToCelsius(fahrenheit);
+                __ui.getCelsiusSlider().setValue(celsius);
+                __ui.getCelsius().setText(Integer.toString(celsius));
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/wam/HauptWerkzeugUI.java b/id/blatt5/code/wam/HauptWerkzeugUI.java
new file mode 100644
index 0000000..c8f38d1
--- /dev/null
+++ b/id/blatt5/code/wam/HauptWerkzeugUI.java
@@ -0,0 +1,140 @@
+import java.awt.GridLayout;
+import java.awt.BorderLayout;
+import javax.swing.BoxLayout;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JLabel;
+import javax.swing.JSlider;
+import javax.swing.JTextField;
+import javax.swing.WindowConstants;
+
+class HauptWerkzeugUI {
+    public static final String NAME = "Temperature converter";
+
+    private JFrame __frame;
+    private JPanel __panel;
+    private JTextField __celsius;
+    private JTextField __fahrenheit;
+    private JSlider __celsiusSlider;
+    private JSlider __fahrenheitSlider;
+    private JButton __convertCelsiusButton;
+    private JButton __convertFahrenheitButton;
+
+    private GridLayout __layout;
+
+    private static final int CELSIUS_MIN = -18;
+    private static final int CELSIUS_MAX = 100;
+    private static final int CELSIUS_INIT = 0;
+
+    private static final int FAHRENHEIT_MIN = 0;
+    private static final int FAHRENHEIT_MAX = 212;
+    private static final int FAHRENHEIT_INIT = 32;
+
+    public HauptWerkzeugUI() {
+        __frame = new JFrame();
+        __frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        __frame.setTitle(NAME);
+    }
+
+    public void initGUI() {
+        __panel = new JPanel();
+        __layout = new GridLayout(1, 3);
+        __panel.setLayout(__layout);
+
+        JPanel celsiusPanel = new JPanel();
+        BoxLayout boxLayoutCelsius = new BoxLayout(celsiusPanel, BoxLayout.Y_AXIS);
+        celsiusPanel.setLayout(boxLayoutCelsius);
+
+        __celsius = new JTextField();
+        __celsius.setText(Integer.toString(CELSIUS_INIT));
+        __celsiusSlider = new JSlider(JSlider.VERTICAL, CELSIUS_MIN, CELSIUS_MAX, CELSIUS_INIT);
+        celsiusPanel.add(__celsius);
+        celsiusPanel.add(__celsiusSlider);
+        celsiusPanel.add(new JLabel("Celsius"));
+
+        JPanel fahrenheitPanel = new JPanel();
+        BoxLayout boxLayoutFahrenheit = new BoxLayout(fahrenheitPanel, BoxLayout.Y_AXIS);
+        fahrenheitPanel.setLayout(boxLayoutFahrenheit);
+
+        __fahrenheit = new JTextField();
+        __fahrenheit.setText(Integer.toString(FAHRENHEIT_INIT));
+        __fahrenheitSlider = new JSlider(JSlider.VERTICAL, FAHRENHEIT_MIN, FAHRENHEIT_MAX, FAHRENHEIT_INIT);
+        fahrenheitPanel.add(__fahrenheit);
+        fahrenheitPanel.add(__fahrenheitSlider);
+        fahrenheitPanel.add(new JLabel("Fahrenheit"));
+
+        JPanel middlePanel = new JPanel();
+        middlePanel.setLayout(new BoxLayout(middlePanel, BoxLayout.Y_AXIS));
+        __convertCelsiusButton = new JButton("Convert to Fahrenheit");
+        __convertFahrenheitButton = new JButton("Convert to Celsius");
+        middlePanel.add(__convertCelsiusButton);
+        middlePanel.add(__convertFahrenheitButton);
+
+        __panel.add(celsiusPanel);
+        __panel.add(middlePanel);
+        __panel.add(fahrenheitPanel);        
+
+        __frame.getContentPane().add(__panel, BorderLayout.CENTER);
+        __frame.pack();
+    }
+
+    /**
+     * Gibt das JFrame der UI zurück.
+     * 
+     * @return Das JFrame der UI.
+     */
+    public JFrame getUIFrame()
+    {
+        return __frame;
+    }
+
+    /**
+     * Zeigt das Hauptfenster an.
+     */
+    public void zeigeFenster()
+    {
+        __frame.setLocationRelativeTo(null);
+        __frame.setVisible(true);
+    }
+
+    /**
+     * Schließt das Fenster.
+     */
+    public void schliesseFenster()
+    {
+        __frame.dispose();
+    }
+
+    public JTextField getCelsius() {
+        return __celsius;
+    }
+
+    public JTextField getFahrenheit() {
+        return __fahrenheit;
+    }
+
+    public JSlider getCelsiusSlider() {
+        return __celsiusSlider;
+    }
+
+    public JSlider getFahrenheitSlider() {
+        return __fahrenheitSlider;
+    }
+    
+    public JButton getCelsiusButton() {
+        return __convertCelsiusButton;
+    }
+
+    public JButton getFahrenheitButton() {
+        return __convertFahrenheitButton;
+    }
+
+    /**
+     * Aktualisiert das Layout.
+     */
+    private void aktualisiereLayout()
+    {
+        __frame.validate();
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/wam/MANIFEST.MF b/id/blatt5/code/wam/MANIFEST.MF
new file mode 100644
index 0000000..5ee19cb
--- /dev/null
+++ b/id/blatt5/code/wam/MANIFEST.MF
@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: Main
+
diff --git a/id/blatt5/code/wam/Main.java b/id/blatt5/code/wam/Main.java
new file mode 100644
index 0000000..c7f3cf7
--- /dev/null
+++ b/id/blatt5/code/wam/Main.java
@@ -0,0 +1,28 @@
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
+
+public class Main {
+    public static void main(String[] argv) {
+        final Umrechner rechner = new Umrechner();
+        SwingUtilities.invokeLater(new Runnable()
+        {
+            @Override
+            public void run()
+            {
+                try
+                {
+                    UIManager.setLookAndFeel(UIManager
+                            .getSystemLookAndFeelClassName());
+                }
+                catch (ClassNotFoundException | InstantiationException
+                        | IllegalAccessException
+                        | UnsupportedLookAndFeelException e)
+                {
+                    e.printStackTrace();
+                }
+                new HauptWerkzeug(rechner);
+            }
+        });
+    }
+}
\ No newline at end of file
diff --git a/id/blatt5/code/wam/Umrechner.java b/id/blatt5/code/wam/Umrechner.java
new file mode 100644
index 0000000..e57ab60
--- /dev/null
+++ b/id/blatt5/code/wam/Umrechner.java
@@ -0,0 +1,10 @@
+
+public class Umrechner {
+    public int convertToCelsius(int fahrenheit) {
+        return Math.round(5.0f / 9.0f * (fahrenheit - 32));
+    }
+
+    public int convertToFahrenheit(int celsius) {
+        return Math.round(1.8f * celsius + 32);
+    }
+}
\ No newline at end of file