Problem inserting new node into JTree with depthFirstEnumeration()

Question

Hello,
I'm currently trying to use depthFirstEnumeration() to add and delete nodes for a simple JTree. I've written a method to handle this, but it keeps coming back with an exception saying that 'new child is an ancestor'.
All I'm trying to do is add and delete nodes from a JTree using add and remove buttons within a swing program. When a user adds the new node the JTree needs to be updated with new labels in sequential order dependent upon a depthFirst traversal of the JTree.
My current code for the add button is as follows,
public void actionPerformed(ActionEvent event) 
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
        Enumeration e = rootNode.depthFirstEnumeration();
        if(event.getSource().equals(addButton))
            if (selectedNode != null)
                while (e.hasMoreElements()) {
                // add the new node as a child of a selected node at the end
                DefaultMutableTreeNode newNode = (DefaultMutableTreeNode)e.nextElement();
                 // treeModel.insertNodeInto(newNode, selectedNode, selectedNode.getChildCount());
                //System.out.print(newNode.getUserObject() + "" + newNodeSuffix++);
                String label = "Node"+i;
                treeModel.insertNodeInto(newNode, selectedNode, selectedNode.getChildCount());
                i++;
                  //make the node visible by scrolling to it
                TreeNode[] totalNodes = treeModel.getPathToRoot(newNode);
                TreePath path = new TreePath(totalNodes);
                tree.scrollPathToVisible(path);
                //System.out.println();
        else if(event.getSource().equals(deleteButton))
            //remove the selected node, except the parent node
            removeSelectedNode();           
    } As you can see in the above code, I've tested the incrementing of the new nodes in a System.out.print() statement and they appear to be incrementing correctly. I just can't see how to correctly output the labels for the nodes.
Any help and advice always appreciated.

Answer 1

This is about the 5th posting on the same question. Here is the link to the last posting so you can see what has already been suggested so you don't waste your time making the same suggestion.
http://forum.java.sun.com/thread.jspa?threadID=704980
The OP doesn't seem to understand that nodes don't just rename themselves and that renderers will only display the text of the current node. If you want the text displayed to changed, then you need to change the text associated with each node, which means iterating through the entire tree to update each node with new text. Then again, maybe I don't understand the question, but the OP keeps posting the same question without any additional information.