page gets hang on runtime

after running following servlets the web page is get hanged
"ServletRecord.java"

import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.lang.String;
import java.sql.Connection;
import javax.servlet.RequestDispatcher;

import java.sql.Statement;
import java.sql.ResultSet;
import javax.naming.*;
import javax.naming.directory.*;
import oracle.jdbc.pool.OracleDataSource;

public class ServletRecord extends HttpServlet{

public void doGet(HttpServletRequest request, HttpServletResponse response)
                                   throws ServletException,IOException{
        doPost(request,response);
    }
   public void doPost(HttpServletRequest request, HttpServletResponse response)
                                   throws ServletException,IOException{
            response.setContentType("text/html");
            PrintWriter out = response.getWriter();

Connection con = null;
                Statement st1 = null;

ResultSet rs = null;

try {

Context initContext = new InitialContext();
                 Context envContext = (Context) initContext.lookup("java:/comp/env");
                OracleDataSource ds = (OracleDataSource) envContext.lookup("jdbc/abc");
                 if (envContext == null)throw new Exception("Error: No Context");
                if (ds == null) throw new Exception("Error: No DataSource");
                if (ds != null)
                 con = ds.getConnection();

st1 = con.createStatement();

ArrayList al=null;
                ArrayList userList =new ArrayList();
                String query = "select * from ABC.PERSONS order by P_ID";
                System.out.println("query " + query);

rs = st1.executeQuery(query);

while(rs.next())
                {
                    al  = new ArrayList();

al.add(rs.getInt(1));
                  al.add(rs.getString(2));
                  al.add(rs.getString(4));
                  al.add(rs.getString(5));
                  System.out.println("al :: "+al);
                  userList.add(al);
                }

request.setAttribute("userList",userList);

String nextJSP = "Home";

RequestDispatcher dispatcher = request.getRequestDispatcher(nextJSP);
                dispatcher.forward(request,response);

rs.close();
                    st1.close();
                 con.close();

} catch (SQLException se) {
            out.println("An Error Had occurred while accessing the database");
            out.println("<HR>");

out.println(se.getMessage());
        }

catch (Exception e) {
            e.printStackTrace();

} finally {
            try {
                if (rs != null)
                    rs.close();
                if (st1 != null)
                    st1.close();

if (con != null)
                    con.close();
            } catch (Exception e) {
                out.println(e);
            }
        }

}
}

"Home.java"

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.sql.*;
import java.sql.*;
import java.util.*;

public class Home extends HttpServlet{

public void service(HttpServletRequest request, HttpServletResponse response)
                                   throws ServletException,IOException{
            response.setContentType("text/html");
            PrintWriter out = response.getWriter();
out.println("<HTML>");
 out.println("<HEAD>");
  out.println("<TITLE>Servlet Application</TITLE>");

out.println("<script language=\"javascript\">");
out.println("function editRecord(id){");

out.println("window.location.href=\"editUser.jsp?\"+id; }");

out.println("function deleteRecord(id){");

out.println("window.location.href=\"../edit/DeleteUser?\"+id;  }");
out.println("</script>");
 out.println("</HEAD>");

out.println("<BODY>");
 out.println("<br>");
out.println("<table align=\"center\">");

out.println("</table>");
out.println("<br>");
out.println("<table width=\"600px\"  align=\"center\" style=\"background-color:#EDF6EA;border:1px solid #000000;\">");
out.println("<tr><td colspan=9 align=\"center\" height=\"10px\"></td></tr>");

out.println("<tr><td colspan=9 align=\"center\"><a href=\"addUser.jsp\" style=\"font-weight:bold;color:#cc0000;\">Add New User</a></td></tr>");
out.println("<tr><td colspan=9 align=\"center\" height=\"10px\"></td></tr>");
  out.println("<tr style=\"background-color:#7BA88B;font-weight:bold;\">");
     out.println("<td>Person Id</td><td>LastName</td><td>FirstName</td>");
     out.println("<td>Address</td><td>City</td>");
     out.println("<td>Edit</td><td>Delete</td>");

out.println("</tr>");

String bgcolor="";
    int count=0;
    List viewList = new ArrayList();
    Iterator  viewItr;

if(request.getAttribute("userList")!=null && request.getAttribute("userList")!="")
    {
        List userList =  (ArrayList)request.getAttribute("userList");
        Iterator itr = userList.iterator();

while(itr.hasNext())
        {

if(count%2==0)
            {
             bgcolor = "#C8E2D1";
            }
            else
            {

bgcolor = "#EAF8EF";
            }

viewList = (ArrayList)itr.next();
            int P_ID = Integer.parseInt(viewList.get(0).toString());
            viewItr = viewList.iterator();

out.println("<tr style=\"background-color:bgcolor;\">");

while(viewItr.hasNext())
            {

out.println("<td>viewItr.next()</td>");

}
            count++;

out.println("<td><input type=\"button\" name=\"edit\" value=\"Edit\" style=\"background-color:#49743D;font-weight:bold;color:#ffffff;\" onclick=\"editRecord(P_ID);\" ></td>");
                out.println("<td><input type=\"button\" name=\"delete\" style=\"background-color:#ff0000;font-weight:bold;;color:#ffffff;\" value=\"Delete\" onclick=\"deleteRecord(P_ID);\"></td>");
            out.println("</tr>");

}
    }
    if(count==0)
    {

out.println("<tr><td colspan=\"9\" align=\"center\"> </td></tr>");
            out.println("<tr><td colspan=\"9\" align=\"center\">No Record Avaliable</td></tr>");

}

out.println("<tr><td colspan=9 align=\"center\" height=\"2px\"></td></tr>");

out.println("</table>");
 out.println("</BODY>");
out.println("</HTML>");
}
}

following database i 'm using
"P_ID" NUMBER(*,0),
"LASTNAME" VARCHAR2(255 BYTE),
"FIRSTNAME" VARCHAR2(255 BYTE),
"ADDRESS" VARCHAR2(255 BYTE),
"CITY" VARCHAR2(255 BYTE)
i'm not understanding why this is not working

When you say

the web page is get hanged

what exactly does that mean?

What happens on the browser?
Does the server CPU go to 100%?
Do other web apps/pages on the server still respond?

Bill

The following code might be the issue.