What are some design patterns that utilize polymorphism?

What are some design patterns that utilize polymorphism?

Polymorphism is a key concept in many design patterns. Some notable ones include the Strategy Pattern, Factory Pattern, and Observer Pattern.

Can you explain how the Strategy Pattern uses polymorphism?

Sure! The Strategy Pattern allows a family of algorithms to be defined and encapsulated, making them interchangeable. This is achieved through polymorphism, where different strategies can be used without altering the context.

What about the Factory Pattern? How does it relate to polymorphism?

The Factory Pattern uses polymorphism to create objects without specifying the exact class of object that will be created. It defines an interface for creating an object, allowing subclasses to alter the type of objects that will be created.

Can you give me an example of the Observer Pattern?

Certainly! In the Observer Pattern, a subject maintains a list of observers that are notified of any state changes. Each observer implements a common interface, demonstrating polymorphism as different observers can react differently to the same event.