Problem Expanding certain paths in a JTree

Question

I am working with a JTree and trying to do the following:
My JTree is initially defined using the following code:
rootNode = new DefaultMutableTreeNode();
DefaultTreeModel treeModel = new DefaultTreeModel(rootNode);
tree = new JTree(treeModel);
//treeListener = new TreeSelectionListener();
tree.addTreeSelectionListener(treeListener);
DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
renderer.setLeafIcon(null);
tree.setCellRenderer(renderer);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
tree.setShowsRootHandles(true);
tree.setAutoscrolls(true);
tree.setExpandsSelectedPaths(true);
When a user selects a node, and presses some button, I get and save the current path (of the selected component) like this:
TreePath currentPath = tree.getSelectionPath();
Then I do some action on it, then repopulate the JTree
I have the following code at the bottom of the JTree populating method in an effort to expand the path in the tree which was last selected:
tree.expandPath(currentPath);
tree.setVisible(true);
tree.updateUI();
The problem is that when the tree repopulates, it stays completely collapsed, and I can't seem to figure out how automatically make it viewable in an expanded state (I don't want the user to have to go expand each expandable node by clicking beside it)
Does anyone know how to either expand the whole tree from the very beginning, or expand just the selected path?
Thanks in advance for your help,
Noha

Answer 1

To expand on path there is jtree.expandPath(treepath);
To expand the whole tree, I wrote a recursive method.