Use type parameters.

src/main/java/com/samskivert/swing/CollapsibleList.java

@@ -16,9 +16,7 @@ import javax.swing.ListModel;
  * can be collapsed. Each section of a list uses a {@link JList} instance
  * to render the section elements.
  */
-@SuppressWarnings({ "unchecked", // we build with 1.5 which did not have parameterized JList
+public class CollapsibleList<E> extends JPanel
-                    "rawtypes" })
-public class CollapsibleList extends JPanel
 {
     /**
      * Constructs an empty collapsible list.
@@ -36,7 +34,7 @@ public class CollapsibleList extends JPanel
     /**
      * Constructs a collapsible list with the supplied section labels and models.
      */
-    public CollapsibleList (List<String> sections, List<ListModel> models)
+    public CollapsibleList (List<String> sections, List<ListModel<E>> models)
     {
         this(); // set up our layout manager
 
@@ -61,10 +59,10 @@ public class CollapsibleList extends JPanel
      *
      * @return the index of the newly added section.
      */
-    public int addSection (String label, ListModel model)
+    public int addSection (String label, ListModel<E> model)
     {
         add(new JLabel(label));
-        add(new JList(model));
+        add(new JList<E>(model));
         return getSectionCount()-1;
     }
 
@@ -80,9 +78,9 @@ public class CollapsibleList extends JPanel
     /**
      * Returns the list object associated with the specified section.
      */
-    public JList getSectionList (int index)
+    public JList<E> getSectionList (int index)
     {
-        @SuppressWarnings("unchecked") JList list = (JList)getComponent(index*2+1);
+        @SuppressWarnings("unchecked") JList<E> list = (JList<E>)getComponent(index*2+1);
         return list;
     }
 

src/test/java/com/samskivert/swing/TestComboButtonBox.java

@@ -33,7 +33,7 @@ public class TestComboButtonBox
         JFrame frame = new JFrame("Test ComboButtonBox");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
-        DefaultComboBoxModel model = new DefaultComboBoxModel();
+        DefaultComboBoxModel<Image> model = new DefaultComboBoxModel<Image>();
         model.addElement(createImage(Color.blue));
         model.addElement(createImage(Color.green));
         model.addElement(createImage(Color.red));