Where to go with my JTree now. Custom UserObjects or another way to achieve what is needed?

Question

I have a jTree which I populate the nodes from a toString method of List of objects. I have about 10 different kind of objects in that List.

I'm having problems with changing the node name. Normally, when I need to reach an object of a node, I search for the node.toString() in the List to find out where is the object located in the list, so I can do myList.get(i). But when I change the node name, it won't find anything in the List because it doesn't update the objects name. And I can't find a way to save the old name prior to changing node name.

I also tried using my objects as UserObject of the node but when I edit the name, it converts the UserObject back to String

How should I continue?

Answer 1

Thanks to everyone, I managed to tackle this (hopefully) last problem with this particular JTree. Here is how I did it from THIS example:

  private static class MyTreeCellEditor extends DefaultTreeCellEditor {

        public MyTreeCellEditor(JTree tree, DefaultTreeCellRenderer renderer) {
            super(tree, renderer);
        }
        Text newText;
        Real newReal;
        Size newSize;
        Integer newInt;
        Boolean newBool;
        Table newTable;

        @Override
        public Component getTreeCellEditorComponent(JTree jtree, Object o, boolean bln, boolean bln1, boolean bln2, int i) {
            return super.getTreeCellEditorComponent(jtree, o, bln, bln1, bln2, i); //To change body of generated methods, choose Tools | Templates.
        }

    @Override
    public Object getCellEditorValue() {
        String value = (String) super.getCellEditorValue();
        DefaultMutableTreeNode testNode = (DefaultMutableTreeNode) super.tree.getLastSelectedPathComponent();

        Object objToChange = testNode.getUserObject();

        while (objToChange instanceof DefaultMutableTreeNode) {
            DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) objToChange;
            objToChange = parentNode.getUserObject();
        }

        if (testNode.getChildCount() > 0) {
            value += " (" + testNode.getChildCount() + ")";
        }

        if (objToChange instanceof Text) {
            newText = (Text) objToChange;
            newText.setName(value);
            return newText;
        } else if (objToChange instanceof Real) {
            newReal = (Real) objToChange;
            newReal.setName(value);
            return newReal;
        } else if (objToChange instanceof Size) {
            newSize = (Size) objToChange;
            newSize.setName(value);
            return newSize;
        } else if (objToChange instanceof Integer) {
            newInt = (Integer) objToChange;
            newInt.setName(value);
            return newInt;
        } else if (objToChange instanceof Boolean) {
            newBool = (Boolean) objToChange;
            newBool.setName(value);
            return newBool;
        } else if (objToChange instanceof Table) {
            newTable = (Table) objToChange;
            newTable.setName(value);
            return newTable;
        } else {
            return new Text("unexpected object 02");
        }
    }

Text, Real, Size etc. are my custom objects that populate the nodes.

Edit: Just noticed that Object objToChange = testNode.getUserObject(); might return a TreeNode. So I've put a while loop for that.