import javax.swing.
*;
import javax.swing.tree.DefaultMutableTreeNode;
public class TreeDemo extends JFrame {
public TreeDemo() {
setTitle("JTree Example");
setSize(300, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
DefaultMutableTreeNode child1 = new DefaultMutableTreeNode("Child 1");
DefaultMutableTreeNode child2 = new DefaultMutableTreeNode("Child 2");
DefaultMutableTreeNode child3 = new DefaultMutableTreeNode("Child 3");
root.add(child1);
root.add(child2);
root.add(child3);
DefaultMutableTreeNode subChild1 = new DefaultMutableTreeNode("Sub Child 1.1");
DefaultMutableTreeNode subChild2 = new DefaultMutableTreeNode("Sub Child 1.2");
child1.add(subChild1);
child1.add(subChild2);
JTree tree = new JTree(root);
JScrollPane treeView = new JScrollPane(tree);
add(treeView);
setVisible(true);
}
public static void main(String[] args) {
new TreeDemo();
}
}
Output :
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class TreeDemo2 extends JFrame {
public TreeDemo2() {
// Create the frame
setTitle("JTree Example");
setSize(300, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("India");
DefaultMutableTreeNode maharashtra = new DefaultMutableTreeNode("Maharashtra");
DefaultMutableTreeNode mumbai = new DefaultMutableTreeNode("Mumbai");
DefaultMutableTreeNode pune = new DefaultMutableTreeNode("Pune");
DefaultMutableTreeNode nashik = new DefaultMutableTreeNode("Nashik");
DefaultMutableTreeNode nagpur = new DefaultMutableTreeNode("Nagpur");
maharashtra.add(mumbai);
maharashtra.add(pune);
maharashtra.add(nashik);
maharashtra.add(nagpur);
root.add(maharashtra);
root.add(new DefaultMutableTreeNode("Gujarat"));
JTree tree = new JTree(root);
JScrollPane treeView = new JScrollPane(tree);
add(treeView);
setVisible(true);
}
public static void main(String[] args) {
new TreeDemo2();
}
}
Output :
Exercise No1 :
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class TreeDemo2 extends JFrame {
public TreeDemo2() {
// Create the frame
setTitle("JTree Example");
setSize(300, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("This PC");
DefaultMutableTreeNode main1 = new DefaultMutableTreeNode("Windows-SSD C");
DefaultMutableTreeNode MinGW = new DefaultMutableTreeNode("MinGW");
DefaultMutableTreeNode PerfLogs = new DefaultMutableTreeNode("PerfLogs");
DefaultMutableTreeNode Windows = new DefaultMutableTreeNode("Windows");
DefaultMutableTreeNode XboxGames = new DefaultMutableTreeNode("XboxGames");
main1.add(MinGW);
main1.add(PerfLogs);
main1.add(Windows);
main1.add(XboxGames);
root.add(main1);
root.add(new DefaultMutableTreeNode("D"));
JTree tree = new JTree(root);
JScrollPane treeView = new JScrollPane(tree);
add(treeView);
setVisible(true);
}
public static void main(String[] args) {
new TreeDemo2();
}
}
Output :
