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);
}
}
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Download this program.
Output of the program:
