Cash Register Program For 5 Products Using Switch Or If Else Statement In Java

We're told to make a cash register program for 5 products using Java. It loops until "-1" is entered on the "Continue?" input dialog box.There should be a:

1. Main Menu - where the user will pick what to buy (one product at a time) like the sample code below and prompt the user if he will buy another product or not. If yes, the program will go back to the main menu to buy another product and if not, continue to the program. And it looks something like this: LEvFOwQ.png

2. Receipt - at the end of every transaction.

3. Daily Sales Report where it shows all receipts then grand total like:

Transaction 1

-subtotal

Transaction 2

-subtotal

and so on then,

GRAND TOTAL

4. Inventory Report where it shows the Items Available before the Selling, Items Sold, and Items Available after Selling in table format.

Below is the code for a simple cash register for only one product that I made but I need to upgrade it for it to work for 5 products. That code will serve as the basis for this program.make the switch or if-else statement for the main menu first and if I got it right I try doing the rest.

int userQty1 = Integer.parseInt(JOptionPane.showInputDialog(
"Product ID Product Name Product Quantity Product Price"
+prodID1 + " " +prodName1 + " " + prodQty1 + " " +prodPrice1 "
"
+ and so on until prod5));

[code].....