Nrthugu

I have an array setup and another class in this program that gives me a getInStock to give me the current value in the array. I'm trying to subtract one of the stock once the person using the program enters in a number for the item being used. I want it to then update the number in the array in case it is used again.

public static void main(String args) {

            // create the stdin object (to use the keyboard)

            Scanner stdin = new Scanner(System.in);

            int itemSelected = 0;   // Item ID selected by user, 0 for not available

            int itemIndex = 0;      // selected index into array of items



            // display items in the arrays using the toString method

            System.out.printf ("%-4.4s %6.6s %-11.11sn", "Item", "Price", "Description");

            for (Item b : ITEM_LIST) { System.out.println(b); }       





            System.out.println ("nSelect an item by its item number. Enter 0 to quit");

            do {

                try {

                    System.out.printf ("item #%d: ", shoppingCartCount+1);

                    itemSelected = stdin.nextInt( );       // read line from keyboard

                    if (itemSelected == 0)

                        continue;   // exit the loop



                    // Search ITEM_LIST looking for the user's requested itemID

                    for (itemIndex=0; itemIndex<ITEM_LIST.length; itemIndex++)



                        if (itemSelected == ITEM_LIST[itemIndex].getItemID()){



                            if (ITEM_LIST[itemIndex].getInStock()<1){

                                System.out.println("Item is not in stock try later");                      

                            }

                            break;  // it was found, itemIndex = position in the LIST

                        }

                    if (itemIndex == ITEM_LIST.length){  // reached the end and not found                

                        System.out.println("Item is not available");

                    }

                    if (shoppingCartCount==9 ) {

                        shoppingCart[shoppingCartCount] = ITEM_LIST[itemIndex];

                        shoppingCartCount++;  // keep track of items in the cart 

                        System.out.println("Your cart is full.");

                        break;

                    }                

                    else {  // The item was found                       

                        shoppingCart[shoppingCartCount] = ITEM_LIST[itemIndex];

                        shoppingCartCount++;  // keep track of items in the cart            

                    }

                }   //end of try

                catch (InputMismatchException |  StringIndexOutOfBoundsException e) {

                    System.out.println ("Illegal selection. Try again"); 

                }  

            } while (itemSelected != 0);   // loop until a '0' is entered



            // display the shopping cart

            System.out.println("nnThank you for shopping at Shop-azon");

            double total=0;

            for (int i=0; i<shoppingCartCount; i++) {

                System.out.println(shoppingCart[i]);

                total += shoppingCart[i].getPrice();            

            }

            System.out.println(shoppingCartCount + " items in your cart");

            System.out.printf("Your total is $%.2fnn", total);       

        } // end of main()  

for the use case you have explained , like you want to remove the number when you are using it and later update it better use Queue in Java and use functions like pop() , push() , seek() for help you can see this

Click here!