diff --git a/src/Week11/Button.java b/src/Week11/Button.java
index 42a6d78..0ad57e7 100644
--- a/src/Week11/Button.java
+++ b/src/Week11/Button.java
@@ -1,43 +1,44 @@
-import javax.swing.JButton;
-import javax.swing.border.EmptyBorder;
+import javax.swing.*;
+import javax.swing.border.*;
 
+import java.awt.*;
+import java.awt.event.*;
 import java.awt.Color;
-import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
 
 public class Button extends JButton {
     private boolean selected;
     private Color bg;
     private Color fg;
 
+    /**
+     * @param String buttonLabel
+     * @param Color fg
+     * @param Color bg
+     */
     public Button(String buttonLabel, Color bg, Color fg) {
         super(buttonLabel);
             this.bg = bg;
             this.fg = fg;
 
+        applyCommon();
         deselect();
     }
 
+    // Apply default appearance to the button upon exiting the bounds.
     public void deselect() {
         selected = false;
-        applyDefaultStyle();
-    }
-
-    public void select() {
-        selected = true;
-        applyFocusedStyle();
-    }
-
-    private void applyDefaultStyle() {
         setBackground(bg);
         setForeground(fg);
     }
 
-    private void applyFocusedStyle() {
+    // Apply focused appearance to the button upon hover.
+    public void select() {
+        selected = true;
         setBackground(fg);
         setForeground(bg);
     }
 
+    // Apply hover functionality to all buttons, as well as removing certain default stylings.
     private void applyCommon() {
         addMouseListener(
                 new MouseListener() {
@@ -53,11 +54,15 @@ public class Button extends JButton {
                     @Override
                     public void mouseEntered(MouseEvent e) {
                         select();
+                        repaint();
+                        revalidate();
                     }
 
                     @Override
                     public void mouseExited(MouseEvent e) {
                         deselect();
+                        repaint();
+                        revalidate();
                     }
                 });
 
diff --git a/src/Week11/Gui.java b/src/Week11/Gui.java
index aba1a8b..a30db4f 100644
--- a/src/Week11/Gui.java
+++ b/src/Week11/Gui.java
@@ -1,9 +1,6 @@
-import javax.swing.JFrame;
-import javax.swing.UIManager;
+import javax.swing.*;
 
-import java.awt.Color;
-import java.awt.BorderLayout;
-import java.awt.Dimension;
+import java.awt.*;
 
 public class Gui extends JFrame {
     public Gui() {
diff --git a/src/Week11/Panel.java b/src/Week11/Panel.java
index 6ecb0ee..6c11b78 100644
--- a/src/Week11/Panel.java
+++ b/src/Week11/Panel.java
@@ -1,7 +1,6 @@
-import javax.swing.JPanel;
+import javax.swing.*;
 
-import java.awt.BorderLayout;
-import java.awt.Color;
+import java.awt.*;
 
 public class Panel extends JPanel {
     private Color bg;
@@ -19,6 +18,21 @@ public class Panel extends JPanel {
         setBackground(bg);
         setForeground(fg);
 
-        add(new Button("Example text", new Color(160, 32, 240), Color.WHITE));
+        Button b = new Button("Example text", new Color(160, 32, 240), Color.WHITE);
+            b.addActionListener(
+                e -> {
+                    System.out.println("Button action.");
+                }
+            );
+
+        Button b2 = new Button("Example 2 text", new Color(160, 32, 240), Color.WHITE);
+            b2.addActionListener(
+                e -> {
+                    System.out.println("Button 2 action.");
+                }
+            );
+
+        add(b);
+        add(b2);
     }
 }
diff --git a/src/Week9/Task$SortByTitleComparator.class b/src/Week9/Task$SortByTitleComparator.class
new file mode 100644
index 0000000..885a747
Binary files /dev/null and b/src/Week9/Task$SortByTitleComparator.class differ
diff --git a/src/Week9/Task.class b/src/Week9/Task.class
new file mode 100644
index 0000000..f6bfda3
Binary files /dev/null and b/src/Week9/Task.class differ
diff --git a/src/Week9/Week9$1.class b/src/Week9/Week9$1.class
new file mode 100644
index 0000000..4885178
Binary files /dev/null and b/src/Week9/Week9$1.class differ
diff --git a/src/Week9/Week9$2.class b/src/Week9/Week9$2.class
new file mode 100644
index 0000000..d1649fe
Binary files /dev/null and b/src/Week9/Week9$2.class differ
diff --git a/src/Week9/Week9$3.class b/src/Week9/Week9$3.class
new file mode 100644
index 0000000..c2ded17
Binary files /dev/null and b/src/Week9/Week9$3.class differ
diff --git a/src/Week9/Week9$4.class b/src/Week9/Week9$4.class
new file mode 100644
index 0000000..fbfe28c
Binary files /dev/null and b/src/Week9/Week9$4.class differ
diff --git a/src/Week9/Week9.class b/src/Week9/Week9.class
new file mode 100644
index 0000000..3ba2341
Binary files /dev/null and b/src/Week9/Week9.class differ
diff --git a/src/Week9/Week9Gui.class b/src/Week9/Week9Gui.class
new file mode 100644
index 0000000..dc55d0d
Binary files /dev/null and b/src/Week9/Week9Gui.class differ