Factory Pattern Software <Chrome>

Developers typically encounter three distinct "levels" of this pattern:

: Ideal for when object construction involves complex logic or multiple steps. Real-World Example Imagine a Logistics App : Interface : Transport (with a method deliver() ). Concrete Products : Truck and Ship . Factory : Logistics class.

: An interface or abstract class that declares the factory method , which returns a product. Factory Pattern Software

: You can introduce new product types without breaking existing client code.

: Overrides the factory method to return an instance of a specific concrete product. Common Variations Factory : Logistics class

: The core application just calls planDelivery() . If you add AirLogistics later, the main code doesn't change. When to Avoid

: A more complex version that provides an interface for creating families of related or dependent objects (e.g., a "Furniture Factory" that makes matching Chairs and Sofas). Why Use It? : Overrides the factory method to return an

: The client code relies on an interface rather than specific classes, making the system easier to modify.