Question

Write a program to implement the following: create a class representing a

company where a company has a minimum and maximum limit of the

quantity of products. Allow the user to order from the company product

list (create a list of any ten products). Apply proper constraint if user

order more than the quantity available with the company. Based on the

quantity generate the customer bill.

Answer 1

import java.util.ArrayList;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        ArrayList<String> products = new ArrayList<>();
        products.add("Potato");
        products.add("Tomato");
        products.add("Onion");
        products.add("Cabbage");
        products.add("Carrot");
        products.add("Cucumber");
        products.add("Garlic");
        products.add("Bell Pepper");
        products.add("Eggplant");
        products.add("Pumpkin");
        double[] quantities = {100, 85, 45, 55, 60, 53, 32, 23, 120, 90};
        double[] prices = {1.5, 1.9, 1.6, 1.78, 1.56, 2.3, 1.32, 1.44, 1.65, 1.48};
        double[] shopCart = new double[products.size()];
        Scanner in = new Scanner(System.in);
        while (true) {
            System.out.println("\nSELECT:");
            for (int i = 0; i < products.size(); i++) {
                System.out.println(i + 1 + ". " + products.get(i) + " " + quantities[i] + "kg " + prices[i] + "$ per kg");
            }
            System.out.println("0. Purchase");
            System.out.println("Choice: ");
            int choice = in.nextInt();
            if (choice == 0) {
                StringBuilder builder = new StringBuilder();
                for (int i = 0, j = 1; i < shopCart.length; i++) {
                    if (shopCart[i] > 0) {
                        builder.append(j++).append(". ").append(products.get(i)).append(" Weight: [");
                        builder.append(shopCart[i]).append("kg] Price per kg: [").append(prices[i]).append("$]");
                        builder.append(" Total: [").append(String.format("%.2f", shopCart[i] * prices[i])).append("$]\n");
                    }
                }
                if (builder.length() > 0) {
                    System.out.println("BILL");
                    System.out.println(builder);
                }
                break;
            }
            System.out.println("How many kg(g): ");
            double weigh = in.nextDouble();
            if (quantities[choice - 1] >= weigh) {
                shopCart[choice - 1] += weigh;
                quantities[choice - 1] -= weigh;
            }
        }
    }
}