adding more then one element to the vector

Hi guys
Actually I am adding a integer to my vector which is coming as a parameter from the url but what I want is to show the same vector on the same page but what problem I'm facing is it is showing me only one element in the vector even if I add a lot of data to my vector pls tell me what cld be the problem :
my code is as follows :
dis.jsp:----

<%@page language="java" import="java.util.*"%>
<%@page import="shop.disBean"%>
<%@page import="shop.cart"%>
 
<HTML>
<HEAD>
<TITLE>
Display Products
</TITLE>
</HEAD>
<BODY topmargin="0" leftmargin="0">
<table cellspacing="2" cellpadding="2" border="1">
<tr>
List of Book
<table border="3">
<tr>
<td>Book Name</td>
<td>Price</td>
<td>Publisher</td>
<td>CD</td>
<td>Category Name</td>
<td>Buy</td>
</tr>
<%--int ibook_id;--%>
<% Vector vect=new Vector();
    Vector add = new Vector();
    cart newcart = new cart();
    disBean disB=new disBean();
    disB.connect();
    vect=disB.query();
  int size=vect.size();
 
    for(int i=0;i<size;i++)
    {
    Object refObj=vect.elementAt(i);
    disBean strRecord=(disBean) refObj;
 
  %>
<tr>
<td><%= strRecord.getBook_name()%></a></td>
<td><%= strRecord.getPrice()%></td>
<td><%= strRecord.getPublisher() %></td>
<td><%= strRecord.getCd() %></td>
<td><%= strRecord.getCategory_name() %></td>
<td><a href="dis.jsp?book_id=<%=strRecord.getBook_id()%>">add to cart</a></td>
</tr>
<%
}%>
</table>
</td></tr></table>
<%
 String s = request.getParameter("book_id");
  int BookId;
  if (s != null )
  {
    BookId = Integer.parseInt(s);
    out.println("Id u chossed is " + BookId);
    add = newcart.addtocart(BookId);
  %>
 <%
 }
 %>
     <%
    int addsize = add.size();
      if (addsize > 0)
          {
              for(int i=0; i<addsize;i++)
                {
                    int bookid = ((Integer)add.elementAt(i)).intValue();
 
 %>
    <%=bookid%> <br>
 <%
    }}%>
 
    </BODY>
</HTML>

and my bean is as following through this bean only I'm adding elements in the vector
package shop;

import java.util.*;
import java.sql.*;
 
public class cart extends disBean{
 
 Vector list = new Vector();
    int size;
    Connection conn;
    String url = "jdbc  [img]http://www.javaranch.com/ubb/redface.gif[/img]dbc:test";
 
public Vector addtocart(int id)
 {
 
    if(id > 0)
    {
      list.addElement(new Integer(id));
    }
    return list;
  }
 
  public int getSize()
  {
    int size = list.size();
    return size;
  }
 
  /* public void showcart()
   {
    int len = list.size();
    for(int i=0;i<len;i++)
    {
        System.out.println(list.elementAt(i));
    }
   }*/
 
   public boolean getDetails(int bookid)throws SQLException, ClassNotFoundException{
        try
          {
          conn = DriverManager.getConnection(url, "sa", "");
          Statement stmt = conn.createStatement();
             String query = " select b.book_id, b.book_name, b.price,"+
             "b.publisher, b.cd, c.category_name from book b, category c"+
             "where b.category_id = c.category_id and "+
             "b.book_id = " + bookid ;
    // here we try to find the details of the book specified by the book_id
file://of this object
 
          ResultSet rs = stmt.executeQuery(query);
                    while (rs.next())
                    {
                        setBook_id(rs.getInt("book_id"));
                        setBook_name(rs.getString("book_name"));
                        setPrice(rs.getInt("price"));
                        setPublisher(rs.getString("publisher"));
                        setCd(rs.getString("cd"));
                        setCategory_name(rs.getString("category_name"));
                    }
 
    stmt.close();
    conn.close();
    return true;
    }//end of try
 
    catch (SQLException e) {
                conn.close();
                return false;
        }
  }
 
   public void empty(Vector vect)
  {
    vect.removeAllElements();
  }
 
 }

pls help me out I know the problem is in the vector ..
any help wld be great
Thanks in advance
Regards Preeti
Added the UBB code tag http://www.javaranch.com/ubb/ubbcode.html for readability--Carl
[This message has been edited by Carl Trusiak (edited March 07, 2001).]

The problem isn't with vector, it how you are using cart. Eveytime you call for the page, you create a new one so, it only shows the last one selected. There are plenty of examples of putting the cart into the session object and getting it from there each time.

------------------
Hope This Helps

Carl Trusiak

cld u pls give me some sample of doing it that will be great ...
thanks a lot
Regards Preeti

Hi,
you could use the following:

Ashwin.