X
1.import java.awt.*; 2.import java.awt.*;
import java.applet.*; import java.applet.*;
import javax.swing.tree.*; import javax.swing.tree.*;
import javax.swing.*; import javax.swing.*;
import java.util.*; import java.util.*;
import java.net.*; import java.net.*;
/*<applet code="tree1.class" width=300 /*<applet code="tree1.class" width=300
height=400> </applet> */ height=400> </applet> */
public class tree1 extends JApplet { public class tree1 extends JApplet{
public void init() { public void init()
Container c1 = getContentPane(); {
DefaultMutableTreeNode top = new Container c1= getContentPane();
DefaultMutableTreeNode("TOP"); DefaultMutableTreeNode India=new
DefaultMutableTreeNode A = new DefaultMutableTreeNode("India");
DefaultMutableTreeNode("A"); DefaultMutableTreeNode Maharashtra=new
DefaultMutableTreeNode B = new DefaultMutableTreeNode("Maharashtra");
DefaultMutableTreeNode("B"); DefaultMutableTreeNode Gujarat=new
DefaultMutableTreeNode C = new DefaultMutableTreeNode("Gujarat");
DefaultMutableTreeNode("C"); DefaultMutableTreeNode Mumbai=new
DefaultMutableTreeNode a = new DefaultMutableTreeNode("Mumbai");
DefaultMutableTreeNode("a"); DefaultMutableTreeNode Pune=new
DefaultMutableTreeNode b = new DefaultMutableTreeNode("Pune");
DefaultMutableTreeNode("b"); DefaultMutableTreeNode Nashik=new
DefaultMutableTreeNode c = new DefaultMutableTreeNode("Nashik");
DefaultMutableTreeNode("c"); DefaultMutableTreeNode Nagpur=new
top.add(A); top.add(B);top.add(C); DefaultMutableTreeNode("Nagpur");
A.add(a); B.add(b); C.add(c); India.add(Maharashtra);
JTree jt = new JTree(top); India.add(Gujarat);
c1.add(jt);} Maharashtra.add(Mumbai);
public void paint(Graphics g) { Maharashtra.add(Pune);
super.paint(g); Maharashtra.add(Nashik);
Date d = new Date(); Maharashtra.add(Nagpur);
try{ JTree jt=new JTree(India);
InetAddress ip = c1.add(jt);
InetAddress.getLocalHost(); }
String year = d.getYear()+1900+""; public void paint(Graphics g) {
showStatus("Performed by akshay & prajol super.paint(g);
on"+d.getDate()+"/"+d.getMonth()+"/"+year+" Date d = new Date();
with address "+ip); try{
}catch(Exception e){ InetAddress ip =
e.printStackTrace(); InetAddress.getLocalHost();
} String year = d.getYear()+1900+"";
}} showStatus("Performed by akshay & prajol
on"+d.getDate()+"/"+d.getMonth()+"/"+year+"
with address "+ip);
}catch(Exception e){
e.printStackTrace();
}}}
XIII.
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import java.io.File;
import java.util.*;
import java.net.*;
public class JTreeExample {
public static void main(String[] args) {
JFrame frame = new JFrame("JTree Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree();
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root Directory");
File rootDir = new File(System.getProperty("user.home"));
File[] files = rootDir.listFiles();
if (files != null) {
for (File file : files) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(file.getName());
root.add(node);
if (file.isDirectory()) {
addFilesToNode(file, node);
}
}
}
DefaultTreeModel model = new DefaultTreeModel(root);
tree.setModel(model);
frame.getContentPane().add(new JScrollPane(tree));
frame.setSize(400, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static void addFilesToNode(File dir, DefaultMutableTreeNode node) {
File[] files = dir.listFiles();
if (files != null) {
for (File file : files) {
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(file.getName());
node.add(newNode);
if (file.isDirectory()) {
addFilesToNode(file, newNode);
}
}
}
}
}
