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import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
public class DefaultMutableTreeNodeDemo {
public static void main(String args[]) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
DefaultMutableTreeNode mercury = new DefaultMutableTreeNode("Mercury");
root.insert(mercury, 0);
DefaultMutableTreeNode venus = new DefaultMutableTreeNode("Venus");
root.insert(venus, 1);
DefaultMutableTreeNode mars = new DefaultMutableTreeNode("Mars");
root.insert(mars, 2);
JTree tree = new JTree(root);
JScrollPane scrollPane = new JScrollPane(tree);
frame.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
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