JTree - How do I fire a valueChange Event from a keyPressed Event?

Question

Hi,
I have been stumped trying to figure out how to fire a valueChange event in my JTree from a keyPressed event.
When a user changes tree node using the mouse a valueChange event fires. In my program the valueChange executes some code that must be done. I want to get my JTree to work, so that if a user is nagivating the tree using the keyboard, the code is only executed if they press the enter key.
Below is a little demo program of what I am attempting to accomplish. Any suggestions would be greating appriciated.
Thanks,
Corey
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.tree.*;
import javax.swing.event.*;
public class SimpleTreeDemo extends JFrame  {
  public SimpleTreeDemo() {
  public static void main(String args[]) {
    JFrame j = new SimpleTreeDemo();
    DefaultMutableTreeNode category = new DefaultMutableTreeNode("Top of JTree");
    DefaultMutableTreeNode leaf1 = new DefaultMutableTreeNode("leaf1");
    DefaultMutableTreeNode leaf2 = new DefaultMutableTreeNode("leaf2");
    category.add(leaf1); category.add(leaf2);
    final JTree jtree = new JTree(category);
    boolean bflag = false;
    jtree.addTreeSelectionListener(new TreeSelectionListener() {
         public void valueChanged(TreeSelectionEvent e) {
              System.out.println("valueChanged");
              if (bflag)
                   // Execute Code
    jtree.addKeyListener(new KeyListener() {
        public void keyTyped(KeyEvent ke) {
          System.out.println("keyTyped");
        public void keyPressed(KeyEvent ke) {
             System.out.println("keyPressed");
             if (ke.getKeyCode() == KeyEvent.VK_ENTER)
                  bflag = true;
                // Fire valueChanged here!
        public void keyReleased(KeyEvent ke) {
             System.out.println("keyReleased");}
    Container c = j.getContentPane();
    c.add(jtree);
    j.setSize(200,200);
    j.show();

Answer 1

Try this, it works for me.
// Tree Key Listener
      tree.addKeyListener(new java.awt.event.KeyAdapter() {
         public void keyPressed(KeyEvent e) {
            tree_KeyReleased(e);
private void tree_KeyReleased(KeyEvent e) {
      try {
      int keyCode = e.getKeyCode();
      // Get the Tree Path
      TreePath selPath = tree.getSelectionPath();
      if (keyCode == e.VK_DELETE) { //KeyCode - 127
         removeSelectedNode(); // Remove the node
      else if (keyCode == e.VK_ADD) { // Key Code - 107
         tree.expandPath(selPath); // Expand the Node
      else if (keyCode == e.VK_SUBTRACT) { // Key Code 109
         tree.collapsePath(selPath); // Collapse the Node
      else if (keyCode == e.VK_ENTER) {
          // What Ever you want to do here
      else {
      } catch (NullPointerException ex) {
      //System.out.println("Null");
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