Why I cannot edit and updat tree node in this program??

Question

Dear Friends:
I have following code, it can be run ok,
I set it editable, I hope to edit at run time, but looks like I cannot edit,
what is wrong??
Can you help??
Thanks
package treeSelectionListener;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
public class SelectableTreeTest extends JFrame
     public SelectableTreeTest(){
          JPanel jp = new JPanel();
          JPanel jp2 = new JPanel();
        MyTree myTree= new MyTree();
        MyTree myTree2= new MyTree();
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.setPreferredSize(new Dimension(600,400));
        jp.setPreferredSize(new Dimension(600,400));
        jp2.setPreferredSize(new Dimension(600,400));
        myTree.setPreferredSize(new Dimension(600,400));
        myTree2.setPreferredSize(new Dimension(600,400));
        JScrollPane   jsp = new JScrollPane();
        jsp.setPreferredSize(new Dimension(600,400));
          add(jsp, BorderLayout.CENTER);
          jsp.setViewportView(tabbedPane);
          jp.add(myTree);
          jp2.add(myTree2);
          tabbedPane.addTab("1st Tree", jp);
          tabbedPane.addTab("2nd Tree", jp2);
    public static void main(String[] args) {
        JFrame frame = new SelectableTreeTest();
        WindowUtilities.setNativeLookAndFeel();
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
        frame.pack();
        frame.setVisible(true);
  public class MyTree extends JTree implements TreeSelectionListener {
  private JTree tree;
  private JTextField currentSelectionField;
  public MyTree() {
    Container content = getContentPane();
    DefaultMutableTreeNode root =
      new DefaultMutableTreeNode("Root");
    DefaultMutableTreeNode child;
    DefaultMutableTreeNode grandChild;
    for(int childIndex=1; childIndex<4; childIndex++) {
      child = new DefaultMutableTreeNode("Child " + childIndex);
      root.add(child);
      for(int grandChildIndex=1; grandChildIndex<4; grandChildIndex++) {
        grandChild =
          new DefaultMutableTreeNode("Grandchild " + childIndex +
                                     "." + grandChildIndex);
        child.add(grandChild);
    tree = new JTree(root);
    tree.setEditable(true);
    tree.addTreeSelectionListener(this);
    content.add(new JScrollPane(tree), BorderLayout.CENTER);
    currentSelectionField = new JTextField("Current Selection: NONE");
    content.add(currentSelectionField, BorderLayout.SOUTH);
    setSize(250, 275);
    setVisible(true);
  public void valueChanged(TreeSelectionEvent event) {
    currentSelectionField.setText
      ("Current Selection: " +
       tree.getLastSelectedPathComponent().toString());
}

Answer 1

change this
tree = new JTree(root);
tree.setEditable(true);
tree.addTreeSelectionListener(this);to this
setEditable(true);
addTreeSelectionListener(this);and this
currentSelectionField.setText
  ("Current Selection: " +
   tree.getLastSelectedPathComponent().toString());to this
currentSelectionField.setText
  ("Current Selection: " +
  getLastSelectedPathComponent().toString());and remove this
private JTree tree;