Why this tree can not show on the Applet?

Question

hi, all, I try to create a java Applet show a tree, this following code has no error, but the tree can not show on the Applet, can any one tell me why? thanks!
<code>
import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.dnd.*;
public class AppletApp extends Applet {
     Date myDate;
     protected JTree m_tree = null;
     protected DefaultTreeModel m_model = null;
     protected JTextField m_display;
     public void init() {
     public void paint(Graphics g) {
          DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");          
          DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("node1");          
          root.add(node1);                    
          node1.add(new DefaultMutableTreeNode("sub1_1"));                         
          node1.add(new DefaultMutableTreeNode("sub1_2"));                                        
     public static void main(String arg[]) {
          JFrame myFrame = new JFrame();          
          Container contentPane = myFrame.getContentPane();
          contentPane.setLayout(new GridLayout(1,2));          
          AppletApp app = new AppletApp();          
          contentPane.add(new JScrollPane(app), BorderLayout.CENTER);     
          myFrame.addWindowListener (new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          app.init();
          app.start();
          myFrame.setSize (400,400);                              
          myFrame.setVisible(true);          
</code>

Answer 1

Not quite sure what you are trying to do, but if you move the code from the paint() method into the init() method (then delete your paint() method), then add one new line to the init() method (after the code you just inserted) that reads:
getContentPane().add(new JTree(root));
- You should at least see a tree!