Check out example codes for "how to find the total of the products added to the shopping cart in java program". It will help you in understanding the concepts better.

Code Example 1

import java.util.Scanner;
public class ShoppingCartPrinter
{

   public static void main(String[] args) 
   {
      ItemToPurchase item1= new ItemToPurchase();
      ItemToPurchase item2= new ItemToPurchase();
      Scanner kbdInput = new Scanner(System.in);

      System.out.println("Item 1");
      System.out.println( "Enter the item name: ");
      item1.setName(kbdInput.nextLine());
  etc...

      kbdInput.nextLine();

      ...
      System.out.println ( "Enter the item quantity: ");
      item2.setQuantity(kbdInput.nextInt());



      int totalItem1 = item1.getPrice()* item1.getQuantity();


      System.out.println ("\n"+"TOTAL COST");
      System.out.println (item1.getName()+" "+item1.getQuantity()+" "+" @ $" +totalItem1);
      etc...
      System.out.println ("Total: $"+ (totalItem1 + totalItem2));         
 }
}

Code Example 2

public class ItemToPurchase 
{
   public String itemName;
   public int itemPrice;
   public int itemQuantity;

   public ItemToPurchase()
   {
      itemName="none";
      itemPrice=0;
      itemQuantity=0;  
   }

   public void setName(String name)
   {
      itemName = name;   
   }
   public String getName()
   {
      return itemName;
   }

    }

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