Java Add Node To JTree

How To Add A New Node To JTree Using Java NetBeans

In this Java Tutorial we will see How To Insert A New Node To JTree From JTextField Using DefaultMutableTreeNode + TreeSelectionModel On Button Click Event In Java NetBeans .

Project Source Code:

private void jButtonAddNodeActionPerformed(java.awt.event.ActionEvent evt) {                                               

        

        // get selected Node

        

        TreeSelectionModel smd = jTree1.getSelectionModel();

        

        if(smd.getSelectionCount() > 0){

            DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) jTree1.getSelectionPath().getLastPathComponent();

            DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(jTextField1.getText());

            selectedNode.add(newNode);

            DefaultTreeModel model = (DefaultTreeModel) jTree1.getModel();

            model.reload();

        }

    }  

OutPut:

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