Question

write a java code to create an online shopping system

Answer 1

class Product {
  private String name;
  private double price;
  private int quantity;

  // Getters and setters omitted for brevity
}

class Cart {
  private List<Product> items;

  public void addToCart(Product product) {
    items.add(product);
  }

  public double getTotalPrice() {
    double total = 0;
    for (Product product : items) {
      total += product.getPrice();
    }
    return total;
  }

  // ... other methods for removing items, managing quantities
}

public class OnlineShop {
  private List<Product> products;

  public OnlineShop() {
    // Initialize product list with sample data
    products = new ArrayList<>();
    products.add(new Product("T-Shirt", 19.99, 10));
    products.add(new Product("Laptop", 799.99, 5));
  }

  public void displayProducts() {
    for (int i = 0; i < products.size(); i++) {
      Product product = products.get(i);
      System.out.println((i + 1) + ". " + product.getName() + " - $" + product.getPrice());
    }
  }

  public void addToCart(int productIndex, Cart cart) {
    if (productIndex > 0 && productIndex <= products.size()) {
      Product product = products.get(productIndex - 1);
      cart.addToCart(product);
    } else {
      System.out.println("Invalid product selection.");
    }
  }

  public static void main(String[] args) {
    OnlineShop shop = new OnlineShop();
    Cart cart = new Cart();

    shop.displayProducts();

    // User interaction loop (simulated here)
    int choice = 1; // Sample user choice
    shop.addToCart(choice, cart);

    System.out.println("Cart Total: $" + cart.getTotalPrice());
  }
}

Answer 2

import java.util.*;

public class OnlineShoppingSystem {
    private static List<Product> products = new ArrayList<>();
    private static ShoppingCart cart = new ShoppingCart();
    private static User currentUser;

    public static void main(String[] args) {
        // Initialize some products
        products.add(new Product("Laptop", "High-performance laptop", 999.99));
        products.add(new Product("Smartphone", "Latest smartphone model", 499.99));
        products.add(new Product("Headphones", "Noise-cancelling headphones", 199.99));

        // Simulate user actions
        currentUser = new User("John Doe", "[email protected]", "123 Main St");

        addToCart(products.get(0));
        addToCart(products.get(1));
        viewCart();
        checkout();
    }

    private static void addToCart(Product product) {
        cart.addItem(product);
        System.out.println(product.getName() + " added to cart.");
    }

    private static void viewCart() {
        System.out.println("\nShopping Cart:");
        for (Product item : cart.getItems()) {
            System.out.println(item.getName() + " - $" + item.getPrice());
        }
        System.out.println("Total: $" + cart.calculateTotal());
    }

    private static void checkout() {
        System.out.println("\nChecking out...");
        // Simulate payment processing
        Payment paymentProcessor = new Payment();
        boolean paymentSuccessful = paymentProcessor.processPayment(new Order(cart.getItems(), currentUser, LocalDateTime.now(), "Pending"), new PaymentDetails("John Doe", "1234 5678 9012", "123", "12/24"));
        if (paymentSuccessful) {
            System.out.println("Payment successful. Order placed!");
            cart.clearCart(); // Clear cart after successful checkout
        } else {
            System.out.println("Payment failed. Please try again.");
        }
    }
}