import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import javax.servlet.http.HttpSession;

import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.PrintWriter;
import java.io.IOException;
import java.text.DecimalFormat;

public class ShoppingServ extends HttpServlet

{

String link;
String[] books;
String[] music;
String[] computers;
String<ArrayList> selitems; // JAVA.STRING.LANG doesnot take parameters error
String<ArrayList> cartitems ;// JAVA.STRING.LANG doesnot take parameters error



public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException,java.util.NoSuchElementException
{

	doPost(request,response);

}

public void doPost(HttpServletRequest request,HttpServletResponse response)	throws ServletException,IOException,java.util.NoSuchElementException
{

books=request.getParameterValues("books");
music=request.getParameterValues("music");
computers=request.getParameterValues("computers");

link=request.getParameter("link");

 String rem = request.getParameter("rem");
 String num = request.getParameter("num");






HttpSession session=request.getSession(true);
session.setMaxInactiveInterval(2*60*60);

response.setContentType("html/text");
PrintWriter out=response.getWriter();

if(link.equals("books"))
{
	booksPage(response);
}

else if(link.equals("music"))
{
	musicPage(response);
}

else if(link.equals("computers"))

{
	computerPage(response);
}



else if(link.equals("items"))
{
String page=request.getParameter("items");

String items[]={" "};

if(page.equals("books"))
{
   if(books!=null){
    items=books;
}
}
else if(page.equals("music"))
{
if(music!=null)
{

items=music;
}
}

else if(page.equals("computers"))
{
if(computers!=null){

items=computers;
}

}

out.println("<html>");
        out.println("<head>");
        out.println("<title>Added Items</title>");
        out.println("</head>");
        out.println("<body bgcolor='#99CC66'>");
        out.println("<blockquote>");
        out.println("<p>&nbsp;</p>");
        out.println("<p><font color='#666666' size='+2'>The following items were added to your shopping cart successfully!!</font></p>");
        out.println("<p>&nbsp;</p>");

		try{

		selitems= new ArrayList();

		for(int i=0;i<items.length;i++)
		{
		selitems.add(items[i]);

		StringTokenizer stkn = new StringTokenizer(items[i],"$");

		out.println("---"+stkn.nextToken());
		    out.println("<br>");
        	out.println("<br>");

		while(stkn.hasMoreTokens())
		{

		out.println("Price of Item is $ "+stkn.nextToken());

		}
		    out.println("<br>");
        	out.println("<br>");
            out.println("<br>");
        	out.println("<br>");


		}
		session.setAttribute("selitems",selitems);
		cartitems=(ArrayList)session.getAttribute("cartitems");

		if(cartitems!=null)
		{
		ArrayList<String> tempitems=(ArrayList)session.getAttribute("selitems");

		if(tempitems!=null)
		{
		for(String temp:tempitems)
		{
         cartitems.add(temp);
		}
		}
		session.setAttribute("cartitems",cartitems);
		session.removeAttribute("selitems");

		}

		else{

        	cartitems = new ArrayList();

        	ArrayList<String> tempitems = (ArrayList)session.getAttribute("selitems");

			for(String temp: tempitems)
        	{
        		cartitems.add(temp);
        	}
            session.setAttribute("cartitems", cartitems);
        	session.removeAttribute("selitems");
        }
}

 catch(Exception e)
        {
          out.println("Please Select Any Item");
        }

        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<hr>");
        out.println("<p><a href='shop.fun?link=cart' target='rightFrame' style='text-decoration:none'>[View Cart]</a> &nbsp&nbsp&nbsp");
        out.println("<a href='shop.fun?link=books' target='rightFrame' style='text-decoration:none'> [Go to Books Page]</a> &nbsp&nbsp&nbsp");
        out.println("<a href='shop.fun?link=music' target='rightFrame' style='text-decoration:none'> [Go to Music Page]</a> &nbsp&nbsp&nbsp");
        out.println("<a href='shop.fun?link=computers' target='rightFrame' style='text-decoration:none'> [Go to Computers Page]</a>");
        out.println("</p> &nbsp&nbsp&nbsp  </p>");
        out.println("<p>&nbsp;</p>");
        out.println("</blockquote>");
        out.println("</body>");
        out.println("</html>");
}

else if(link.equals("cart"))
{
        out.println("<html>");
        out.println("<head>");
        out.println("<title>Shopping Cart</title>");
        out.println("</head>");
        out.println("<body bgcolor='#99CC66'>");
        out.println("<blockquote>");
        out.println("<hr>");
        out.println("<p><font color='#666666' size='+1'> Items you have selected: </font></p>");
        out.println("<p>&nbsp;</p>");
        out.println("<div align='center'>");



		try{

		out.println("<table width='60%' border='0' cellpadding='8'>");
        out.println("<tr align='center'>");
        out.println("<th width='65%' scope='col'>&nbsp Item</th>");
        out.println("<th width='10%' scope='col'>&nbsp Price</th>");
        out.println("<th width='25%' scope='col'>&nbsp;</th>");
        out.println("</tr>");

		cartitems=(ArrayList)session.getAttribute("cartitems");

		double total=0.00;

		if(rem!=null)
		{
		if(rem.equals("xyz"))
		{
		cartitems.remove(Integer.parseInt(num));
		session.setAttribute("cartitems",cartitems);
		}
		}
		for(String s:cartitems)
		{
		 out.println("<tr align='left'>");

         StringTokenizer st = new StringTokenizer(s, "$");
         out.println("<td>&nbsp;" + st.nextToken() + "</td>");

		 while (st.hasMoreTokens())
         {
           String tot = st.nextToken();
           out.println("<td>&nbsp;" + tot + "</td>");

           total = total + Double.parseDouble(tot);

         }
         out.println("<td><A href='shop.fun?link=cart&rem=xyz&num=" + cartitems.indexOf(s) +"'");
         out.println("target='rightFrame'>[remove item]</A></td>");
         out.println("</tr>");
        }
		 out.println("</table>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<B>Total: &nbsp&nbsp " + total + "</B>");
        out.println("<p>&nbsp;</p>");
        out.println("<form method='post' action='shop.fun?link=orderplaced'>");
        out.println("<label>");
        out.println("<input type='submit' name='reset' value='Check out'>");
        out.println("</label>");
        out.println("</form>");



		}

		 catch(Exception e){

        	out.println("Please Select Any Item");
        }

		 out.println("<p>&nbsp;</p>");
        out.println("<hr>");
        out.println("<p>&nbsp;</p>");
        out.println("</div>");
        out.println("</blockquote>");
        out.println("</body>");
        out.println("</html>");

		}

		if(link.equals("orderplaced"))
      {

      	out.println("<html>");
        out.println("<head>");
        out.println("<title>Shopping Cart</title>");
        out.println("</head>");
        out.println("<body bgcolor='#99CC66'>");
        out.println("<blockquote>");
        out.println("<hr>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<div align='center'>");

        out.println("<font size = '7' color='374780'><strong>You Have Successfully Placed The Order</strong></font>");
        session.invalidate();

        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<p>&nbsp;</p>");
        out.println("<hr>");
        out.println("<p>&nbsp;</p>");
        out.println("</div>");
        out.println("</blockquote>");
        out.println("</body>");
        out.println("</html>");

      }



		}


void booksPage(HttpServletResponse response) throws ServletException,IOException
{

	response.setContentType("text/html");
	PrintWriter out=response.getWriter();

	out.println("<html>");
      out.println("<head>");
      out.println("<title>Books</title>");
      out.println("</head>");
      out.println("<body bgcolor='#99CC66'>");
      out.println("<blockquote>");
      out.println("<p>  ");
      out.println("<font color='#666666' size='+4'>Shop for Books");
      out.println("</font>");
      out.println("</p>");
      out.println("<hr>");
      out.println("</p>");
      out.println("<div align='right'>");
      out.println("<font color='blue' size='+2'>");
      out.println("<p><a href='shop.fun?link=cart' target='rightFrame' style='text-decoration:none'>");
      out.println("[View Cart]</a></p>");
      out.println("</font>");
      out.println("</div>");
      out.println("<font color='#000033' size='+1'>");
      out.println("<form name='booksshopping' method='post' action='shop.fun'>");
      out.println("<p>");
      out.println("<input type='hidden' name='link' value='items'>");
      out.println("<input type='hidden' name='items' value='books'>");
      out.println("<label>");
      out.println("<input type='checkbox' name='books' value='Java Servlet Programming $29.95'>");
      out.println("Java Servlet Programming [$29.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='books' value='Oracle Database Programming $48.95'>");
      out.println("Oracle Database Programming [$48.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='books' value='System Analysis with UML $14.95'>");
      out.println("System Analysis with UML [$14.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='books' value='Object Oriented Software Programming $35.99'>");
      out.println("Object Oriented Software Programming [$35.99]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='books' value='Java Web Services $27.99'>");
      out.println("Java Web Services [$27.99]<br>");
      out.println("<br>");
      out.println("<br>");
      out.println("<div align='center'>");
      out.println("<input type='submit' name='cart' value='Add to Cart'>");
      out.println("</div>");
      out.println("</label>");
      out.println("<br>");
      out.println("</p>");
      out.println("</form>");
      out.println("<p>&nbsp;</p>");
      out.println("</blockquote>");
      out.println("</body>");
      out.println("</html>");


}


void musicPage(HttpServletResponse response) throws ServletException, IOException
     {

      response.setContentType("text/html");
      PrintWriter out = response.getWriter();

      out.println("<html>");
      out.println("<head>");
      out.println("<title>Music</title>");
      out.println("</head>");
      out.println("<body bgcolor='#99CC66'>");
      out.println("<blockquote>");
      out.println("<p>  ");
      out.println("<font color='#666666' size='+4'>Shop for Music");
      out.println("</font>");
      out.println("</p>");
      out.println("<hr>");
      out.println("</p>");
      out.println("<div align='right'>");
      out.println("<font color='#660000' size='+2'>");
      out.println("<p><a href='shop.fun?link=cart' target='rightFrame' style='text-decoration:none'>[View Caart]</a></p>");
      out.println("</font>");
      out.println("</div>");
      out.println("<font color='#000033' size='+1'>");
      out.println("<form name='musicshopping' method='post' action='shop.fun'>");
      out.println("<p>");
      out.println("<input type='hidden' name='link' value='items'>");
      out.println("<input type='hidden' name='items' value='music'>");
      out.println("<label>");
      out.println("<input type='checkbox' name='music' value='Hallowed be thy name by Iron Maiden $26.99'>");
      out.println("Hallowed be thy name by Iron Maiden [$26.99]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='music' value='Dream of mirrors by Iron Maiden $10.95'>");
      out.println("Dream of mirrors by Iron Maiden [$10.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='music' value='Fatal Tragedy by Dream Theatre $9.97'>");
      out.println("Fatal Tragedy by Dream Theatre [$9.97]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='music' value='Fade to Black by Metallica $13.98'>");
      out.println("Fade to Black by Metallica [$13.98]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='music' value='Hotel California by Eagles $27.99'>");
      out.println("Hotel California by Eagles [$27.99]<br>");
      out.println("<br>");
      out.println("<br>");
      out.println("<div align='center'>");
      out.println("<input type='submit' name='cart' value='Add to Cart'>");
      out.println("</div>");
      out.println("</label>");
      out.println("<br>");
      out.println("</p>");
      out.println("</form>");
      out.println("<p>&nbsp;</p>");
      out.println("</blockquote>");
      out.println("</body>");
      out.println("</html>");

     }



  void computerPage(HttpServletResponse response) throws ServletException, IOException
     {

      response.setContentType("text/html");
      PrintWriter out = response.getWriter();

      out.println("<html>");
      out.println("<head>");
      out.println("<title>Computers</title>");
      out.println("</head>");
      out.println("<body bgcolor='#99CC66'>");
      out.println("<blockquote>");
      out.println("<p>  ");
      out.println("<font color='#666666' size='+4'>Shop for Computers");
      out.println("</font>");
      out.println("</p>");
      out.println("<hr>");
      out.println("</p>");
      out.println("<div align='right'>");
      out.println("<font color='#660000' size='+2'>");
      out.println("<p><a href='shop.fun?link=cart' target='rightFrame' style='text-decoration:none'>[View Cart]</a></p>");
      out.println("</font>");
      out.println("</div>");
      out.println("<font color='#000033' size='+1'>");
      out.println("<form name='computersshopping' method='post' action='shop.fun'>");
      out.println("<p>");
      out.println("<input type='hidden' name='link' value='items'>");
      out.println("<input type='hidden' name='items' value='computers'>");
      out.println("<label>");
      out.println("<input type='checkbox' name='computers' value='Apple MacBook Pro with 13.3\" Display $1299.99'>");
      out.println("Apple MacBook Pro with 13.3\" Display [$1299.99]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='computers' value='Asus Laptop with Centrino 2 Black $949.95'>");
      out.println("Asus Laptop with Centrino 2 Black [$949.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='computers' value='HP Pavilion Laptop with Centrino 2 DV7 $1199.95'>");
      out.println("HP Pavilion Laptop with Centrino 2 DV7 [$1199.95]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='computers' value='Toshiba satellite Laptop with Centrino 2 - Copper $899.99'>");
      out.println("Toshiba satellite Laptop with Centrino 2 - Copper [$899.99]</label>");
      out.println("<br>");
      out.println("<br>");
      out.println("<label>");
      out.println("<input type='checkbox' name='computers' value='Sony VAIO Laptop with Core 2 Duo Cosmopolitan $779.99'>");
      out.println("Sony VAIO Laptop with Core 2 Duo Cosmopolitan [$779.99]<br>");
      out.println("<br>");
      out.println("<br>");
      out.println("<div align='center'>");
      out.println("<input type='submit' name='cart' value='Add to Cart'>");
      out.println("</div>");
      out.println("</label>");
      out.println("<br>");
      out.println("</p>");
      out.println("</form>");
      out.println("<p>&nbsp;</p>");
      out.println("</blockquote>");
      out.println("</body>");
      out.println("</html>");

     }




}

selitems and cartitems don't take parameters,I'm kinda stuck with this error!

Start by using the CODE tags when posting code and only post the code that is related to your problem, not the whole program. If people need to see more code they will ask for it. No one is going to read through that thing you just posted.

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