import java.util.ArrayList;
import java.util.List;

class ShoppingCart {
    private final List<Product> products = new ArrayList<>();

    public List<Product> getProducts() {
        return products;
    }

    public void addProduct(Product product) {
        products.add(product);
    }
}


class Product {
    private final String id;
    private final String name;
    private final double price;

    public Product(String id, String name, double price) {
        this.id = id;
        this.name = name;
        this.price = price;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }
}

public class Example01 {
    public static void main(String[] args) {

        // --- Independent Product Catalog (Products exist regardless of any cart) ---
        Product p1 = new Product("P001", "Laptop", 1200.0);
        Product p2 = new Product("P002", "Headphones", 80.0);
        Product p3 = new Product("P003", "Mouse", 25.0);

        // --- Create a ShoppingCart (aggregation: cart contains products) ---
        ShoppingCart cart = new ShoppingCart();

        cart.addProduct(p1);
        cart.addProduct(p2);
        cart.addProduct(p3);

        System.out.println("Products in the cart:");
        for (Product p : cart.getProducts()) {
            System.out.println("- " + p.getName());
        }

        // --- Destroy the cart (cart is abandoned or session expires) ---
        cart = null;
        System.out.println("\nShoppingCart destroyed.");

        // --- Products still exist (aggregation: independent lifetime) ---
        System.out.println("Products still exist in the catalog:");
        System.out.println("- " + p1.getName());
        System.out.println("- " + p2.getName());
        System.out.println("- " + p3.getName());
    }
}