--- a/java.hints/src/org/netbeans/modules/java/hints/errors/Utilities.java	Mon Aug 04 15:33:21 2008 +0530
+++ a/java.hints/src/org/netbeans/modules/java/hints/errors/Utilities.java	Mon Aug 04 16:35:07 2008 +0530
@@ -100,9 +100,14 @@ 
         
         if (name == null) {
             if(et instanceof LiteralTree) {
-                String guess = (String) ((LiteralTree) et).getValue();
-                if (guess != null)
-                    return guessLiteralName(guess);
+                LiteralTree lt=((LiteralTree) et);
+                //142405 check is LiteralTree.getValue() String before cast
+                if(lt.getValue()instanceof String){
+                    String guess = (String) lt.getValue();
+                    if (guess != null)
+                        return guessLiteralName(guess);
+                }else
+                    return DEFAULT_NAME;
             } else
                 return DEFAULT_NAME;
         }