Problem in Passing JTree object from Servlet pgm to browser

Question

Dear all:
Can anybody help to resolve the problem - pass the JTree obejct from servlet (Tomcat) to IE 6.0. The JTree oject alway shows invalid charcter in IE. Following is my coding.
import java.io.*;
import java.awt.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.swing.*;
import java.net.URL;
import java.sql.*;
import java.lang.*;
import java.util.*;
import javax.swing.tree.*;
//* Testing1 give it null
public class SimpleServer extends HttpServlet
DefaultMutableTreeNode top;
DefaultMutableTreeNode EX01;
DefaultMutableTreeNode EX02;
DefaultMutableTreeNode QB01;
DefaultMutableTreeNode QB02;
DefaultMutableTreeNode N2BS;
DefaultMutableTreeNode N2TS;
//StringTokenizer st2, st1;
String query;
Connection con ;
Statement statm;
ResultSet res, backupRes;
//RowSet res, backupRes;
TreeSet treeset ;
String [] tempArray;
//ServletContext sc ;
ObjectOutputStream out ;
DefaultMutableTreeNode temp_node;
     public void doGet(HttpServletRequest req, HttpServletResponse resp)
     throws ServletException, IOException
resp.setContentType("text/html");
// resp.setContentType("application/octet-stream");
System.out.println("create main node") ;
          out = new ObjectOutputStream(resp.getOutputStream());
          out.writeObject(this.set_NodeMain()); //no DB access,
     public void doPost(HttpServletRequest req, HttpServletResponse resp)
     throws ServletException, IOException
     try
     System.out.println("doPost " );
     doGet(req,resp);
          finally
     public DefaultMutableTreeNode set_NodeMain()
top = new DefaultMutableTreeNode("Tandem");
EX01 = new DefaultMutableTreeNode("EX01");
EX02 = new DefaultMutableTreeNode("EX02");
QB01 = new DefaultMutableTreeNode("QB01");
QB02 = new DefaultMutableTreeNode("QB02");
N2BS = new DefaultMutableTreeNode("N2BS");
N2TS = new DefaultMutableTreeNode("N2TS");
top.add(EX01);
top.add(EX02);
top.add(QB01);
top.add(QB02);
top.add(N2BS);
top.add(N2TS);
return top;
}

Answer 1

JMO - I hate seeing things like this in code:
Just use whitespace to separate the methods.
You can't just send a JTree to a browser. A browser has no idea how to render a Java object.
Put that JTree inside an applet and make it part of a JSP. That'll work.
MOD