how do I remove root node from JTree?

Question

I am currently removing all children from root using below line of code.

        //Remove all children from root
        DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
        DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
        root.removeAllChildren();
        model.reload();

Above code does not remove root from JTree. how do I remove root node from JTree?

Answer 1

Code written below should help you out.

 

DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
        DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
        root.removeAllChildren();
        model.reload();
        model.setRoot(null); // This will remove your root.

let me know