📋 Objective:

Develop a simple eCommerce application using Object-Oriented Programming (OOP) principles in Java. The application should allow users to manage products, customers, and orders.

• 🛍️ Product
  • Attributes: id, name, description, price, stockQuantity
  • Methods: Constructors, getters, setters, toString()
• 👤 Customer
  • Attributes: id, name, email, address
  • Methods: Constructors, getters, setters, toString()
• 📝 Order
  • Attributes: id, customer, productList (List of Product), totalAmount
  • Methods: Constructors, getters, setters, calculateTotalAmount(), toString()
• 📦 OrderManager
  • Attributes: orderList (List of Order)
  • Methods: addOrder(Order order), removeOrder(int orderId), viewAllOrders()
• 👥 CustomerManager
  • Attributes: customerList (List of Customer)
  • Methods: addCustomer(Customer customer), removeCustomer(int customerId), viewAllCustomers()
• 🏷️ ProductManager
  • Attributes: productList (List of Product)
  • Methods: addProduct(Product product), removeProduct(int productId), viewAllProducts(), updateStock(int productId, int newStock)

Create a Main class with a main method to interact with the user. Implement a simple text-based menu to perform the following actions:

• ➕ Add a new product
• ❌ Remove a product
• 📃 View all products
• ➕ Add a new customer
• ❌ Remove a customer
• 📃 View all customers
• 🆕 Create a new order
• 📃 View all orders

The project should be organized into packages to separate different concerns:

• model: Contains the Product, Customer, and Order classes.
• manager: Contains the OrderManager, CustomerManager, and ProductManager classes.
• main: Contains the Main class with the main method.