Insert node in JTree

Question

Hi!
I have a JTree created and I need to insert a node in the JTree at a particular path that the use wants. I read the path and the node to be added as a string from the user:
//Read path and node name
String path = JOptionPane.showInputDialog (this, "Enter new node path");
File f = new File (path);
//Create new child
DefaultMutableTreeNode child = new DefaultMutableTreeNode (f.getName());
DefaultMutableTreeNode parent = new DefaultMutableTreeNode (f.getParent());
//Get model and add new node
DefaultTreeModel model = (DefaultTreeModel)jTree1.getModel();
model.insertNodeInto (child, parent, parent.getChildCount());
child.setParent(parent);
jTree1.scrollPathToVisible(new TreePath(child.getPath()));
model.reload();
But, the new node is not showing up.
Kindly help,
x86

Answer 1

Not pretty, but should give you the idea.import java.awt.event.*;
import java.awt.*;
import javax.swing.tree.*;
import javax.swing.*;
import java.io.File;
import java.util.Stack;
public class Test extends JFrame implements ActionListener {
  DefaultMutableTreeNode root = new DefaultMutableTreeNode();
  JTree jt = new JTree(root);
  File f = new File("C:\\temp\\foo\\bar\\foo.txt");
  public Test() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = getContentPane();
    jt.setRootVisible(false);
    content.add(new JScrollPane(jt), BorderLayout.CENTER);
    JButton jb = new JButton("Add");
    content.add(jb,BorderLayout.SOUTH);
    jb.addActionListener(this);
    setSize(300,300);
    show();
  public static void main(String args[]) { new Test(); }
  public void actionPerformed(ActionEvent ae) {
    Stack s = new Stack();
    File p = (File)s.push(f);
    while (p.getParent()!=null) p=(File)s.push(p.getParentFile());
    DefaultMutableTreeNode current = root, tmp;
    while (!s.isEmpty()) {
      p=(File)s.pop();
      boolean found=false;
      for (int i=0; i<current.getChildCount(); i++) {
        if (current.getChildAt(i).equals(p)) {
         found=true;
         current=(DefaultMutableTreeNode)current.getChildAt(i);
      if (!found) {
        tmp = new DefaultMutableTreeNode(p);
        current.add(tmp);
        current = tmp;
    jt.updateUI();
}