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Create JTree using an Object
Posted on: May 30, 2007 at 12:00 AM

In this section you will learn to create a JTree using object that works with Hashtable.

Create JTree using an Object

In this section you will learn to create a JTree using object that works with Hashtable.

Program Description:

This program simply creates a JTree and uses string type array. Program defines a string type array (Data) to keep multiple data to be displayed in a tree structure. Here the init() method that uses a Hashtable object to store data .This object is added to a JTree. Data is added in a tree node format.

Here is the code of this program:


import javax.swing.*;

import java.awt.*;

import javax.swing.JTree.*;

import java.awt.BorderLayout;

import java.util.*;



public class JTreeObject extends JFrame{

  String[][] Data = {

  {"Amar"}, {"BCA", "Address","rohini","Delhi"},

  {"Vinod"}, {"BCA", "Software", "Rohini", "Delhi"},

  {"Chandan"}, {"MCA", "Software", "Programer", "Rohini", "Delhi"}, 

  {"Suman"}, {"MCA", "Deginer", "Web", "Delhi"},

  {"Ravi"},{"MCA","Software","programer"}};



  public JTreeObject(){

  super("JTreeobject frame");

  setSize(300, 250);

  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  }



  public void init(){

  Hashtable hash = new Hashtable();

  for (int i = 0; i < Data.length; i+=2){

  hash.put(Data[i][0], Data[i + 1]);

  }

  JTree tree = new JTree(hash);

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

  }

  public static void main(String args[]){

  JTreeObject object = new JTreeObject();

  object.init();

  object.setVisible(true);

  }

}

Download this program.

Output of the program:

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