Bug 66439 Copy of Class causes update error in package explorer
RC1 RHEL JDK 1.4.2_02 Motif I have experienced a problem where I copy a java file and paste it into the same package, accepting the default new name (CopyOfClass.java) However, the package view does not list the class, but it does list 2 instances of the last class in the package (note that I am using the hierarchical view). The file is aparently inserted in the correct location, but the name->class mapping is incorrect: clicking on classes that appear before where the new class should be inserted brings up the correct class, but clicking on classes that appear after the inserted class brings up a different class than the one selected. Restarting eclipse causes the problem to go away
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* Adds a listener for expand and collapse events in this viewer. Has no
	 * effect if an identical listener is already registered.
	 * 
	 * @param listener
	 *           a tree viewer listener
	 */
	public void addTreeListener(ITreeViewerListener listener) {
		treeListeners.add(listener);
	}
	/**
	 * Adds the given SWT tree listener to the given SWT control.
	 * 
	 * @param control
	 *           the SWT control
	 * @param listener
	 *           the SWT tree listener
	 */
	protected abstract void addTreeListener(
		Control control,
		TreeListener listener);
	
	protected void associate(Object element, Item item) {
		Object data = item.getData();
		if (data != null && data != element && equals(data, element)) {
			
			
			
			unmapElement(data, item);
			item.setData(element);
			mapElement(element, item);