Program
import java.util.Scanner; class Product { String name; int quantity; double price; double tax; // Constructor public Product(String name, int quantity, double price, double tax) { this.name = name; this.quantity = quantity; this.price = price; this.tax = tax; } // Method to calculate the total amount public double calculateTotalAmount() { double totalPrice = price * quantity; double totalTax = totalPrice * (tax / 100); return totalPrice + totalTax; } } public class ProductCalculation { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); // Taking input...