Please help me to develop a shopping cart in java

Question

I want to develop a simple shopping cart application where a particulart owner can add the items, and the user have to select the item code and the quantity he needs. These are the things i need.
Implement a shopping cart with following features.
1. Create items with required attributes.
2. Define shopping cart parameters
3. define stock values
4. Create an order
5. add to cart
6. Copy cart
7. remove item from cart
8. Check out
9. Print history.
i'm so cunfused. Please help me.

Answer 1

/* This program will add the product code,name,and the price of the items
import java.io.*;
import java.util.*;
public class AddingItems
     public String code,name;
     public static float price;
     LinkedList olist=null;
     public AddingItems(String code,String name,float price)
     this.code=code;
     this.name=name;
     this.price=price;
     public Object getUserInput()
     System.out.println();
     GetInput gi=new GetInput();
     int number=gi.getInteger(" Enter the number of items you want to add to the system : ");
     System.out.println();
     System.out.println();
     olist=new LinkedList(); //declaring the array length according to the user input
          for(int i=0;i<number;i++)
               System.out.println(" **** Enter The Product Details *** ");
               System.out.println();
               GetInput gicode=new GetInput();
               code=gicode.getString("\t Enter the product code : ");
               GetInput giname=new GetInput();
               name=giname.getString("\t Enter the name of the product :");
               GetInput giprice=new GetInput();
               price=giprice.getInteger("\t Enter the product price in Rs. :");
               // creating an object of the AddingItems class
               AddingItems items=new AddingItems(code,name,price);
               // the value input from the user to the system is now assigned to the array created with the length given by the user
               olist.add(items);
          return olist;
          public void display()
          System.out.println();
          System.out.println("\t\t\t*** These are the products in the system **** ");
          System.out.println();
          System.out.println("\t\t\t Product Code \t\t\t Product Name \t\t\t Price in Rs.");
          System.out.println();
          for(int i=0;i<olist.size();i++)
          AddingItems items=(AddingItems)olist.get(i);
          System.out.println("\t\t\t "+items.code+"\t\t\t\t "+items.name+"\t\t\t\t "+items.price);
          System.out.println();
          /*public void addItemsToCart()
          System.out.println();
          GetInput input=new GetInput();
          System.out.println();
          String selection=input.getString("Do you want to continue adding the products to your shopping cart ? [y]es,[N]o : ");
          System.out.println();
          switch(selection.charAt(0))
               case 'y':
               case 'Y':
               System.out.println();
               System.out.println("Enter the products and the quantities you want to add to your shopping cart :");
               System.out.println("........................................................................... ");
               LinkedList myList=null;
               break;
               case 'n':
               case 'N':
               System.out.println();
               String message=" You are about to log off from the system: ";
               System.out.println(message);
               break;
               default:
public static void main(String[] args)
AddingItems items=new AddingItems("code","name",price);
//AddingItems[] additems=(AddingItems)items.getUserInput();
items.getUserInput();
items.display();
     /*GetInput input=new GetInput();
     System.out.println();
     String selection=input.getString("Do you want to continue adding the products to your shopping cart ? [Y]es,[N]o : ");
     System.out.println();
     switch(selection.charAt(0))
          case 'y':
          case 'Y':
          System.out.println();
          System.out.println(" Enter the code of the product and the quantity you want to add to the shopping cart ");
          String code=null;
          int quantity=0;
          double total=0.0;
          LinkedList myList=new LinkedList();
          GetInput itemc=new GetInput();
          String itemcc=itemc.getString();
          //GetInput list=new GetInput();
          Scanner sc=new Scanner(System.in);
          System.out.println(" .............. Enter the code and the quantity you wamt to add to your shopping cart");
          System.out.println();
          System.out.println();
          //while(sc.equals(item.code))
          Scanner c=nextString();
          //GetInput list=new GetInput();
          //AddingItems items=new AddingItems("code");
          //String listcode=list.getString("Enter the item code :");
          if(listcode==olist.contains(true))
          myList.add(listcode);     
          GetInput list2=new GetInput();
          //int listquantity=list2.getInteger("Enter the quantity :");
          //myList.add(listquantity);     
          System.out.println("Do you want to continue ");
          break;
          case 'n':
          case 'N':
          System.out.println();
          String message=" You are about to log off from the system: ";
          System.out.println(message);
          GetInput select=new GetInput();
          System.out.println();
          String need=select.getString("Do you want to proceed ? [o]k ,gnore : ");
          case 'o':
          case 'O':
          System.exit(1);
          break;
     default:
          //GetInput input=new GetInput();
     //code=
this is i did using the linked list to add the items to the shopping cart but now i'm so stuck that i can't search for the product code where the user adds is there in the list which is added by the owner. pls help