### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.ui
Index: ui/org/eclipse/jdt/internal/ui/typehierarchy/TraditionalHierarchyViewer.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TraditionalHierarchyViewer.java,v
retrieving revision 1.38
diff -u -r1.38 TraditionalHierarchyViewer.java
--- ui/org/eclipse/jdt/internal/ui/typehierarchy/TraditionalHierarchyViewer.java	6 Aug 2009 13:53:47 -0000	1.38
+++ ui/org/eclipse/jdt/internal/ui/typehierarchy/TraditionalHierarchyViewer.java	9 Nov 2010 09:02:14 -0000
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2009 IBM Corporation and others.
+ * Copyright (c) 2000, 2010 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -97,7 +97,8 @@
 					}
 					IType[] interfaces= hierarchy.getRootInterfaces();
 					for (int i= 0; i < interfaces.length; i++) {
-						res.add(interfaces[i]);
+						if (!res.contains(interfaces[i]))
+							res.add(interfaces[i]);
 					}
 				} else {
 					if (Flags.isInterface(hierarchy.getCachedFlags(input))) {