Java Program for Shopping Bill

In this section, we will discuss how to create Java programs for shopping bills. For generating the shopping bill, we require the product ID, name, quantity, price per item, and total price of the product, and grand total. Besides the product details, we can also add some other details like date of purchase, discount (if any), SGST, CGST, POS name, address, contact details, bill number, etc.

In the following Java program, we have created two classes first is the Product class and the second is the ShoppingBill class.

The Product class has the details related to the product such as product name, quantity, price per unit, and total price. We have declared these properties as private. So that no one can access these properties directly. In order to create an object of the Product class, we have created a constructor of the Product class and, we will put all the product properties in that constructor. The class also has a method displayFormat() that displays the bill on the console.

The ShoppingBill class reads the item name, quantity, price per unit and calculates the total price to be paid. Also, reads a character 'Y' or 'N' after entering the detail of a product. If you want to enter more than one product, press 'Y' after entering the details of each product, else press 'N'. It shows the total price to pay.

At the end of the application, before displaying the result we will display all product will properties, and for that reason display() method is used to have some printing formats.

ShoppingBill.java

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.text.SimpleDateFormat;  
import java.util.Date;  
import java.util.Calendar;
class Product 
    {
        // properties
        private String id;
        private String pname;
        private int qty;
        private double price;
        private double totalPrice;
         
        // constructor
        Product(String id, String pname, int qty, double price, double totalPrice) 
        {
            this.id=id;
            this.pname = pname;
            this.qty = qty;
            this.price = price;
            this.totalPrice = totalPrice;
        }
            // getter methods
            public String getId() 
                {
                    return id;
                }
                public String getPname() 
                {
                    return pname;
                }
                public int getQty() 
                {
                    return qty;
                }
                public double getPrice() 
                {
                    return price;
                }
                public double getTotalPrice() 
                {
                    return totalPrice;
                }
                //displayFormat
                public static void displayFormat() 
                {
                	System.out.format("-----------------------------------------------------------------------------------------------------------------------------------");
                    System.out.print("\nProduct ID \t\tName\t\tQuantity\t\tRate \t\t\t\tTotal Price\n");
                    System.out.format("-----------------------------------------------------------------------------------------------------------------------------------\n");
                }
                 
                // display
                public void display() 
                {
                    System.out.format("   %-9s             %-9s      %5d               %9.2f                       %14.2f\n" ,id, pname, qty, price, totalPrice);
                }
    }
public class ShoppingBill 
    {
        public static void main(String args[]) 
            {
                // variables
                String id = null;
                String productName = null;
                int quantity = 0;
                double price = 0.0;
                double totalPrice = 0.0;
                double overAllPrice = 0.0;
                double cgst, sgst, subtotal=0.0, discount=0.0;
                char choice = '\0';
                System.out.println("\t\t\t\t--------------------Invoice-----------------");
                System.out.println("\t\t\t\t\t "+"  "+"Metro Mart Grocery Shop");
                System.out.println("\t\t\t\t\t3/98 Mecrobertganj New Mumbai");
                System.out.println("\t\t\t\t\t"  +"    " +"Opposite Metro Walk");
                System.out.println("GSTIN: 03AWBPP8756K592"+"\t\t\t\t\t\t\tContact: (+91) 9988776655");
                //format of date and time
                SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");  
                Date date = new Date();  
                Calendar calendar = Calendar.getInstance();
                String[] days = new String[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
                //prints current date and time
                System.out.println("Date: "+formatter.format(date)+"  "+days[calendar.get(Calendar.DAY_OF_WEEK) - 1]+"\t\t\t\t\t\t (+91) 9998887770");
                Scanner scan = new Scanner(System.in);
                System.out.print("Enter Customer Name: ");
                String customername=scan.nextLine();
                //create Scanner class object
                //creating an ArrayList to store the product
                List<Product> product = new ArrayList<Product>();
                do 
                    {
                        // read input values
                        System.out.println("Enter the product details: ");
                        System.out.print("Product ID: ");
                        id = scan.nextLine();
                        System.out.print("Product Name: ");
                        productName = scan.nextLine();
                        System.out.print("Quantity: ");
                        quantity = scan.nextInt();
                        System.out.print("Price (per unit): ");
                        price = scan.nextDouble();
                        //calculate total price for a particular product
                        totalPrice = price * quantity;
                        //calculates overall price
                        overAllPrice = overAllPrice + totalPrice;
                        //creates Product class object and add it to the List
                        product.add( new Product(id, productName, quantity, price, totalPrice) );
                        // ask for continue shopping?
                        System.out.print("Want to add more items? (y or n): ");
                        //reads a character Y or N
                        choice = scan.next().charAt(0);
                        //read remaining characters, don't store (no use)
                        scan.nextLine();
                    } 
                while (choice == 'y' || choice == 'Y');
                //display all product with its properties
                Product.displayFormat();
                for (Product p : product) 
                {
                    p.display();
                }
                //price calculation
                System.out.println("\n\t\t\t\t\t\t\t\t\t\tTotal Amount (Rs.) " +overAllPrice);
                //calculating discount
                discount = overAllPrice*2/100;
                System.out.println("\n\t\t\t\t\t\t\t\t\t\t    Discount (Rs.) " +discount);
                //total amount after discount
                subtotal = overAllPrice-discount; 
                System.out.println("\n\t\t\t\t\t\t\t\t\t\t          Subtotal "+subtotal);
                //calculating tax
                sgst=overAllPrice*12/100;
                System.out.println("\n\t\t\t\t\t\t\t\t\t\t          SGST (%) "+sgst);
                cgst=overAllPrice*12/100;
                System.out.println("\n\t\t\t\t\t\t\t\t\t\t          CGST (%) "+cgst);
                //calculating amount to be paid by buyer
                System.out.println("\n\t\t\t\t\t\t\t\t\t\t     Invoice Total " +(subtotal+cgst+sgst));
                System.out.println("\t\t\t\t----------------Thank You for Shopping!!-----------------");
                System.out.println("\t\t\t\t                     Visit Again");
                // close Scanner
                scan.close();
            }   
    }

Output: