Adding Nodes to Jtree

gistfile1.java

DefaultTreeModel model = (DefaultTreeModel)tree.getModel();
        DefaultMutableTreeNode root = (DefaultMutableTreeNode)model.getRoot();
        DefaultMutableTreeNode c1 = new DefaultMutableTreeNode("Cruce #1");
        c1.add(new DefaultMutableTreeNode("Child 1"));
        root.add(c1);                
        model.reload();