Help needed on accessing an arraylist

Question

Hello
I have declared an arrayList globally as follows:
     ArrayList itemList = new ArrayList();I have then wrote a method to test if a user's session is new, if so set the arrayList into the session using setAttribute. The code then gets the attribute from the session and stores it in the variable listFromSession. This is also set into the session. The code is below:
//ItemList itemList;
          if (ca.isNew()){
               //itemList = new ArrayList();
          ca.setAttribute("itemlist", itemList);
          ArrayList listFromSession = (ArrayList)ca.getAttribute("itemList");
          listFromSession.add(c);
          ca.setAttribute("itemList", listFromSession);I have then tried to retrieve elements from the arrayList. Code is below, but im not sure if im trying to access the arrayList as you would a normal array:
ArrayList listFromSession = (ArrayList)ca.getAttribute("itemList");
                    for (int i = 0; i < listFromSession.length; i++){
                         int amt = listFromSession.getprodQuant(i);
                         int id = listFromSession.getStockID(i);
                         String name = listFromSession.getprodName(i);
                         float price = listFromSession.getprodPrice(i);
                         float totalPrice = amt * price;
                         out.println("<TD>" + id + "</TD>");
                         out.println("<TD>" + name + "</TD>");
                         out.println("<TD>" + amt + "</TD>");
                         out.println("<TD>" + price + "</TD>");
                         out.println("<TD>" + totalprice + "</TD>");
                    }For example, i did originally have int amt = listFromSession(i).getprodQaunt; and so forth but that threw the same error: cannot find symbol getProdQuant even when I put code it in the example above.
Basically the compiler cannot find the get methods nor the variable length(), ive tried size() but it dosn't like that either
Can anyone help?
Thanks                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

Can anyone understand as to why my arraylist cannot be accesssed or return the elements?
Is it because the initialization is outside of the method that is accessing the list?
package cart;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.Enumeration;
import cart.CartItem;
public class CartSession extends HttpServlet
     private HttpSession ca = null;
     private int numProducts = 0;
     ArrayList itemList = new ArrayList();
     ArrayList listFromSession = new ArrayList();
       public void doPost(HttpServletRequest request,
                               HttpServletResponse response)
            throws ServletException, IOException
         response.setContentType("text/html");
          PrintWriter out = response.getWriter();
          int currentProduct = Integer.parseInt(request.getParameter("stock"));
          String currentName = request.getParameter("name");
          float currentPrice = Float.parseFloat(request.getParameter("price"));
          String am = request.getParameter("Amount");
          if (am == null) am = "1";
          int currentAmount = Integer.parseInt(am);
          cart.CartItem c = new cart.CartItem(currentProduct, currentName, currentPrice, currentAmount);
          ca = request.getSession();
          //ItemList itemList;
          if (ca.isNew()){
               //itemList = new ArrayList();
          ca.setAttribute("itemlist", itemList);
          ArrayList listFromSession = (ArrayList)ca.getAttribute("itemList");
          listFromSession.add(c);
          ca.setAttribute("itemList", listFromSession);
          ca.setAttribute("currentProd", c);
          sendPage(response);
     private void sendPage(HttpServletResponse reply) throws IOException
                    reply.setContentType("text/HTML");
                    PrintWriter out = reply.getWriter();
                    out.println("<HTML>");
                    out.println("<HEAD>");
                    out.println("<TITLE></TITLE>");
                    out.println("<HEAD>");
                    out.println("<BODY><H1>Your Shopping Cart</H1>");
                    out.println("<CENTER>");
                    out.println("<BR><BR><BR>");
                    //cart.removeAttribute("currentProd");
                         out.println("<TABLE BGCOLOR=Aqua BORDER=2>");
                         out.println("<TR>");
                         out.println("<TH>Stock ID</TH>");
                         out.println("<TH>Product</TH>");
                         out.println("<TH>Quantity</TH>");
                         out.println("<TH>Unit price</TH>");
                         out.println("<TH>Total price</TH>");
                         out.println("</TR>");
                    ArrayList listFromSession = (ArrayList)ca.getAttribute("itemList");
                    for (int i = 0; i < listFromSession.length; i++){
                         int amt = listFromSession.getprodQuant(i);
                         int id = listFromSession.getStockID(i);
                         String name = listFromSession.getprodName(i);
                         float price = listFromSession.getprodPrice(i);
                         float totalPrice = amt * price;
                         out.println("<TD>" + id + "</TD>");
                         out.println("<TD>" + name + "</TD>");
                         out.println("<TD>" + amt + "</TD>");
                         out.println("<TD>" + price + "</TD>");
                         out.println("<TD>" + totalprice + "</TD>");
                         //See if user wants more items
                         out.println("<FORM METHOD=POST ACTION='paymentform.html'>");
                         out.println("Would you like to<BR>");
                         out.println("<INPUT TYPE=SUBMIT VALUE=\" Add more items \">");
                         out.println("<FORM METHOD=POST ACTION='paymentform.html' \">");
                         out.println("<INPUT TYPE=SUBMIT VALUE=\" Check Out \">");
                    out.println("</TABLE>");
                    out.println("</FORM>");
                    out.println("</CENTER>");
                    out.println("</BODY>");
                    out.println("</HTML>");
                    out.flush();
{code}