Shopping cart!! Retriving values from Hashtable?

Hi,
Could you please help me solve this problem?
I am adding some values to the Hashtable. For every time I add the server is definitely showing
me that some thing is added to the Hashtable. But when I try to print the values present in
Hashtable, I do not see any thing on the browser other than "table headers" ? Can any one help
me?
Here are the codes
ShopBean.java
import java.util.*;
import java.lang.*;
public class ShopBean
     private Hashtable hashtable = new Hashtable();
     public ShopBean()
     public void addToCart(String itemid,String name,float price,int quantity)
          String[] items = {itemid,name,Float.toString(price),Integer.toString(quantity)};
          if(hashtable.containsKey(itemid))
               String[] tmpItem = (String[])hashtable.get(itemid);
               int tmpQuantity = Integer.parseInt(tmpItem[3]);
               quantity += tmpQuantity;
               tmpItem[3] = Integer.toString(quantity);
          else
               hashtable.put(itemid,items);
     public Enumeration getEnumeration()
          return hashtable.elements();
Tibre.java
public class Tibre extends HttpServlet
     String user,s1,s2,s3,s4,s5,s6,s7,prev,next,flag;
     int i,count=0,i1,i2,i3,i4,records=0,from,to,no,rem,k,c;
     public void doGet(HttpServletRequest req,HttpServletResponse res)
          doPost(req,res);
     public void doPost(HttpServletRequest req,HttpServletResponse res)
          try
               ServletOutputStream sos = res.getOutputStream();
               HttpSession ses = req.getSession(true);
               user=(String)ses.getValue("user");
               ShopBean cart = new ShopBean();
               String id = req.getParameter("id");
               if(id != null)
                    String name = req.getParameter("name");
                    Float price = new Float(req.getParameter("price"));
                    cart.addToCart(id,name,price.floatValue(),1);
                    System.out.println("cart values in tibre.java"+cart);
               sos.println("<html>");
               sos.println("<body bgcolor=lightyellow>");
               sos.println("<p>Welcome to Online shopping "+user+" , Please see the
gallery of items.</p>");
               sos.println("<table border='1' cellspacing='1' width='41%'
cellpadding='2' id='AutoNumber1'>");
               sos.println("<tr>");
                    sos.println("<td width='21%'>");
                    sos.println("<img border='0' src='images/11.gif' width='120'
height='150'>   ");
                    sos.println("</td>");
                    sos.println("<td width='79%'>");
                    sos.println("<img border='0' src='images/22.gif' width='120'
height='150'></td>");
               sos.println("</tr>");
               sos.println("<tr>");
               sos.println("<form method='post'
action='http://localhost:8080/servlet/Tibre'>");
                    sos.println("<td width='21%'>$300 <input type=submit value='Add
to Cart' name=tibre1>");
                    sos.println("</td>");
                    sos.println("<input type='hidden' value='100' name='id'>");
                    sos.println("<input type='hidden' value='Tibre' name='name'>");
                    sos.println("<input type='hidden' value='300.89' name='price'>");
                    res.sendRedirect("http://localhost:8080/servlet/Tibre");
                    sos.println("</form>");
                    sos.println("<form method='post'
action='http://localhost:8080/servlet/Tibre'>");
                    sos.println("<td width='79%'>$800.99 <input type=submit
value='Add to Cart' name=tibre2>");
                    sos.println("</td>");
                    sos.println("<input type='hidden' value='200' name='id'>");
                    sos.println("<input type='hidden' value='Compaq' name='name'>");
                    sos.println("<input type='hidden' value='800.99' name='price'>");
                    res.sendRedirect("http://localhost:8080/servlet/Tibre");
                    sos.println("</form>");
               sos.println("</tr>");
               sos.println("</table>");
               sos.println("<a href='http://localhost:8080/servlet/ViewCart'>View
Cart</a>");
               sos.println("</body>");
               sos.println("</html>");
          catch(Exception e)
               e.printStackTrace();
ViewCart.java // When I click viewcart I should display the contents from the hashtable
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class ViewCart extends HttpServlet
     public void doGet(HttpServletRequest req,HttpServletResponse res)
          try
               ServletOutputStream sos = res.getOutputStream();
               ShopBean cart = new ShopBean();
               sos.println("<html><head>");
               sos.println("<title> Shopping Cart Contents</title>");
               sos.println("</head>");
               sos.println("<body bgcolor=lightyellow>");
               sos.println("<table border='1' width='300' cellspacing='0'
cellpadding='2' align='center'>");
               sos.println("<caption><b>Shopping cart contents</b></caption>");
sos.println("<tr><th>description</th><th>Price</th><th>Quantity</th></tr>");
               Enumeration enum=cart.getEnumeration();
               String[] tmpItem;
               while(enum.hasMoreElements())
                    tmpItem=(String[])enum.nextElement();
                    sos.println("<tr>");
                    sos.println("<td>"+tmpItem[1]+"</td>");
                    sos.println("<td align='center'>"+tmpItem[2]+"</td>");
                    sos.println("<td align='center'>"+tmpItem[3]+"</td></tr>");
               sos.println("</table>");
               sos.println("</center>");
               sos.println("<a     href='http://localhost:8080/servlet/Tibre'>Back to
Catalog</a>");
               sos.println("</body>");
               sos.println("</html>");
          catch(Exception e)
               e.printStackTrace();
Also please correct me if there are any mistakes in my code.
Thanks for any help
Uma

Few errors,
1.Your 'addToCart' method in the bean will not work as you are thinking. Try to find out the reason by yourself.
2.ShopBean cart = new ShopBean(); in your ViewCart servlet gives you a fresh bean with a blank hashtable. Obviously it will not contain any items and hence you are not getting them displayed in the browser. Again you need to find out the error, I can give you a clue, Insert an item in the bean's constructor and test your code.
3.You need to carry the information between your servlets, session is the best thing to use. So, your bean's scope must be session.
Try to solve it by yourself, this forum will always be there to guide you.
Hope this helps.
Sudha

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Shopping cart!! Retriving values from Hashtable?

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