HttpSession Management with List and more than one selected values

hello frieds ...
this are html and servlet files i try to get attribute from list box it select more than one values i try to save it in vector but not get one.
look it and reply....

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
   <HEAD>
      <META name="GENERATOR" content="IBM WebSphere Studio">
      <TITLE>Shopping.html</TITLE>
   </HEAD>
   <BODY>
<P align="center"><FONT color="#9999ff" size="6"><BLINK><B>Shopping Centre</B></BLINK></FONT></P>
<P><BR>
<FONT size="+2" color="#9999ff" face="Bookman Old Style">Select Items to be pruchase</FONT></P>
<FORM action="servlet/checkOut" method="POST">Items : 
<SELECT name="items" size="3" multiple>
    <OPTION value="LG" selected>Monitor</OPTION>
    <OPTION value="Intel">Processor</OPTION>
    <OPTION value="Logitech">Mouse</OPTION>
    <OPTION value="Windows 2000 Advance Server">OS</OPTION>
    <OPTION value="Java 2">Lanaguage</OPTION>
</SELECT> <BR>
<BR>
<INPUT name="submit" type="submit" value="Submit"> <INPUT name="reset" type="reset" value="Reset"></FORM>
</BODY>
</HTML>
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class checkOut extends HttpServlet implements SingleThreadModel {
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException {

PrintWriter out = res.getWriter();
out.println("<html><title>Your Shopping</title><body>Hello<br>");
out.println("Items you Selected are as follows<br>");
try {
HttpSession session = req.getSession();
Vector items = (Vector) session.getAttribute("items");
out.println("<p>Number items selected :"+items.size()+"<br>");
for (Enumeration e = items.elements() ; e.hasMoreElements()  ;)  {
   String item_name = (String) e.nextElement();
   String item_value = (String) session.getAttribute(item_name);
   out.println("<p>Item "+item_value+"<br>");
   //out.println("<p>Item "+e.nextElement().toString()+"<br>");
}
out.println("</body></html>");
}catch (Throwable e) {
}
}
}

[ October 11, 2002: Message edited by: Mike Curwen ]

Try this...

/* @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@  */
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class checkOut extends HttpServlet implements SingleThreadModel {
public void doPost(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException {
PrintWriter out = res.getWriter();
out.println("<html><title>Your Shopping</title><body>Hello<br>");
out.println("Items you Selected are as follows<br>");
try {
Vector items =new Vector();
String s[]=req.getParameterValues("items");
if(s!=null){
for(int i=0;i<s.length;++i){
items.addElement(s[i]);
/* items can be printed here itself. But if you put in the session
you can get it from any page */
}
}
HttpSession session = req.getSession(true);
session.putValue("newitems",items);
/* in your code you have not put the value in the session */
Vector newitems = (Vector) session.getValue("newitems");
int i=0;
out.println("<p>Number items selected :"+newitems.size()+"<br>");
for (Enumeration e = newitems.elements() ; e.hasMoreElements()  ;)   {
i++;
String item_name = (String) e.nextElement();
out.println("<p>Item  No: "+i+" :   "+item_name+"<br>");
}
out.println("</body></html>");
}catch (Throwable e) {
}
}
}
/*  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@  */

[ October 11, 2002: Message edited by: Mike Curwen ]