Editable JTree Nodes

In this section, you will learn to make JTree editable nodes. For example. . If you want to edit the name of a tree node then the following program will help you a lot.

Program Description:

This program constructs a JTree that contains editable nodes. Firstly, it defines a class "JTreeEditable". Here we have used the init() method to create the nodes (Root, open, close, save, save as, and exit) of the tree. These nodes are added in a JTree object and we set the editable mode to " true " through the setEditable() method. The init() method adds these components to the JFrame. When you want to edit these components, just double click them and rename them..

setEditable():
This method takes a boolean value that is either a 'true' or a 'false'. When you enter true it becomes editable.

Here is the code of this program:


import javax.swing.*;

import javax.swing.tree.*;

import java.awt.*;



public class JTreeEditable extends JFrame {

  DefaultTreeModel treeModel;

  public JTreeEditable() {

  super("Editable Tree Frame");

  setSize(200, 200);

  setDefaultCloseOperation(EXIT_ON_CLOSE);

  }

  

  public void init(){

  DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");

  DefaultMutableTreeNode file = new DefaultMutableTreeNode("File");

  DefaultMutableTreeNode open = new DefaultMutableTreeNode("Open"); 

  DefaultMutableTreeNode save = new DefaultMutableTreeNode("Save"); 

  DefaultMutableTreeNode saveas = new DefaultMutableTreeNode("Save As"); 

  DefaultMutableTreeNode exit = new DefaultMutableTreeNode("Exit"); 

  treeModel = new DefaultTreeModel(root);

  JTree tree = new JTree(treeModel);

  tree.setEditable(true);

  treeModel.insertNodeInto(file,root, 0);

  file.add(open);

  file.add(save);

  file.add(saveas);

  file.add(exit);

  getContentPane().add(tree, BorderLayout.CENTER);

  }

  

  public static void main(String args[]) {

  JTreeEditable st = new JTreeEditable();

  st.init();

  st.setVisible(true);

  }

}

Download this program.

Output this program:

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