How do i get to display the nodes under the root node in a JTree?

Question

In my JTree there is a root node.This root node has 4 child nodes.Each child node in turn has nodes under it.What i need to do is just display the child nodes under the root node i.e., the four child nodes and keep these child nodes in a collapsed state.How do i go sbout this?

Answer 1

Please try this:
tree.expandRow(0);
SwingUtilities.invokeLater(new Runnable(){
    public void run(){
        tree.setRootVisible(false);
});If you want to show the RootHandles:
tree.setShowsRootHandles(true);If you want to keep nodes in collapsed state (not expandable):
        tel = new TreeWillExpandListener() {
            public void treeWillExpand(TreeExpansionEvent event) throws ExpandVetoException {
                throw new ExpandVetoException( event, "Don't want" );
            public void treeWillCollapse(TreeExpansionEvent event) throws ExpandVetoException {
        tree.addTreeWillExpandListener(tel);Some reading material:
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html
http://java.sun.com/docs/books/tutorial/uiswing/events/treewillexpandlistener.html
Edited by: Andre_Uhres on Nov 14, 2007 5:17 PM
Edited by: Andre_Uhres on Nov 14, 2007 5:33 PM
Edited by: Andre_Uhres on Nov 14, 2007 5:39 PM