adding images, ideally:

assignments/a3/src/main/java/Controls.java

@@ -29,8 +29,14 @@ public class Controls extends JPanel implements Observer
     this.setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
     this.setPreferredSize(new Dimension(1280,75));
     this.setMinimumSize(new Dimension(320, 75));
+    this.starImg = ImageIO.read(new File("star.png"));
+    this.gridImg = ImageIO.read(new File("grid.png"));
+    this.listImg = ImageIO.read(new File("list.png"));
+    this.starIcon = new ImageIcon(starImg);
+    this.gridIcon = new ImageIcon(gridImg);
+    this.listIcon = new ImageIcon(listImg);
     
-    this.grid = new JButton("Grid");
+    this.grid = new JButton(gridIcon);
     grid.addActionListener(new ActionListener()
     {
       public void actionPerformed(ActionEvent e)
@@ -39,7 +45,7 @@ public class Controls extends JPanel implements Observer
       }
     });
     
-    this.list = new JButton("List");
+    this.list = new JButton(listIcon);
     list.addActionListener(new ActionListener()
     {
       public void actionPerformed(ActionEvent e)