Name:- Priyanka Khandu Thadke
Class:-A(CO5I) Roll no:- 60
Practical no:-07 Write a java to Create a JTree.
Program code:-
Q1.Java program to demonstrate use of tree component in swing.
import javax.swing.*;
import javax.swing.tree.*;
public class JtreeExample {
public static void main(String[] args) {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Thadke");
DefaultMutableTreeNode child1 = new DefaultMutableTreeNode("Priyanka");
DefaultMutableTreeNode child2 = new DefaultMutableTreeNode("Ankita");
DefaultMutableTreeNode child3 = new DefaultMutableTreeNode("Sayali");
root.add(child1);
root.add(child2);
root.add(child3);
JTree tree = new JTree(root);
JFrame frame = new JFrame("JTree Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(tree));
frame.setSize(300, 300);
frame.setVisible(true);
Output:
Q2. Write a program code to generate the following output
import javax.swing.*;
import javax.swing.tree.*;
public class JtreeExample {
public static void main(String[] args) {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("India");
DefaultMutableTreeNode child1 = new DefaultMutableTreeNode("Maharastra");
DefaultMutableTreeNode child2 = new DefaultMutableTreeNode("Mumbai");
DefaultMutableTreeNode child3 = new DefaultMutableTreeNode("Pune");
DefaultMutableTreeNode child4 = new DefaultMutableTreeNode("Nashik");
DefaultMutableTreeNode child5 = new DefaultMutableTreeNode("Nagpur");
DefaultMutableTreeNode child6 = new DefaultMutableTreeNode("Gujrat");
root.add(child1);
root.add(child6);
child1.add(child2);
child1.add(child3);
child1.add(child4);
child1.add(child5);
JTree tree = new JTree(root);
JFrame frame = new JFrame("JTree Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(tree));
frame.setSize(300, 300);
frame.setVisible(true);
Output:
Exercise:
Q1. Write a Jtree program to show root directory and its subdirectory and its
subFolders of Your System.
import javax.swing.*;
import javax.swing.tree.*;
public class JtreeExample {
public static void main(String[] args) {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("System Folders and
subdirectories");
DefaultMutableTreeNode child0 = new DefaultMutableTreeNode("D drive");
DefaultMutableTreeNode child1 = new DefaultMutableTreeNode("jdk");
DefaultMutableTreeNode child2 = new DefaultMutableTreeNode("Oracle.exe");
DefaultMutableTreeNode child3 = new DefaultMutableTreeNode("photo");
DefaultMutableTreeNode child4 = new DefaultMutableTreeNode("Screenhot");
DefaultMutableTreeNode child5 = new DefaultMutableTreeNode("Images");
DefaultMutableTreeNode child6 = new DefaultMutableTreeNode("Desktop");
DefaultMutableTreeNode child7 = new DefaultMutableTreeNode("Ajp folder");
DefaultMutableTreeNode child8 = new DefaultMutableTreeNode("awt program");
DefaultMutableTreeNode child9 = new DefaultMutableTreeNode("swing program");
DefaultMutableTreeNode child10 = new DefaultMutableTreeNode("zoom");
DefaultMutableTreeNode child11 = new DefaultMutableTreeNode("C drive");
DefaultMutableTreeNode child12 = new DefaultMutableTreeNode("Apps");
DefaultMutableTreeNode child13 = new DefaultMutableTreeNode("Whatsapp");
DefaultMutableTreeNode child14 = new DefaultMutableTreeNode("BGMI");
DefaultMutableTreeNode child15 = new DefaultMutableTreeNode("Avm");
root.add(child0);
child0.add(child1);
child0.add(child2);
child0.add(child3);
child3.add(child4);
child3.add(child5);
root.add(child6);
child6.add(child7);
child7.add(child8);
child7.add(child9);
child6.add(child10);
root.add(child11);
child11.add(child12);
child12.add(child13);
child12.add(child14);
child11.add(child15);
JTree tree = new JTree(root);
JFrame frame = new JFrame("JTree Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new
JScrollPane(tree));
frame.setSize(300, 300);
frame.setVisible(true); }}
Output:
