src/share/classes/javax/swing/plaf/ComboBoxUI.java

@@ -36,17 +36,17 @@
 public abstract class ComboBoxUI extends ComponentUI {
 
     /**
      * Set the visibility of the popup
      */
-    public abstract void setPopupVisible( JComboBox c, boolean v );
+    public abstract void setPopupVisible( JComboBox<?> c, boolean v );
 
     /**
      * Determine the visibility of the popup
      */
-    public abstract boolean isPopupVisible( JComboBox c );
+    public abstract boolean isPopupVisible( JComboBox<?> c );
 
     /**
      * Determine whether or not the combo box itself is traversable
      */
-    public abstract boolean isFocusTraversable( JComboBox c );
+    public abstract boolean isFocusTraversable( JComboBox<?> c );
 }