// Create tree
    JTree tree = new JTree();
    DefaultTreeModel model = (DefaultTreeModel)tree.getModel();
    
    // Find node to which new node is to be added
    int startRow = 0;
    String prefix = "J";
    TreePath path = tree.getNextMatch(prefix, startRow, Position.Bias.Forward);
    MutableTreeNode node = (MutableTreeNode)path.getLastPathComponent();
    
    // Create new node
    MutableTreeNode newNode = new DefaultMutableTreeNode("green");
    
    // Insert new node as last child of node
    model.insertNodeInto(newNode, node, node.getChildCount());

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