Hello Tree

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.tree.*;

public class TreeDemo extends Jframe {

JTree tree;

DefaultTreeModel treeModel;

String[] strLeaves =

{"Leaf 1.", "Leaf 2.", "Leaf 3.", "Subroot "};

public TreeDemo(){

super ("Demonstration of JTree");

setSize(200,400);

addWindowListener

(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

}