Luis Enrique León's List: Software design

• By coding to an interface, you know you can insulate yourself from a lot of changes that might happen to a system down the road. Why? If your code is written to an interface, then it will work with any new classes implementing that interface through polymorphism.
• by encapsulating the pizza creating in one class, we now have only one place to make modifications when the implementation changes.

• A:

  A: Defining a simple factory as a static method is a common technique and is often called a static factory. Why use a static method? Because you don’t need to instantiate an object to make use of the create method. But remember it also has the disadvantage that you can’t subclass and change the behavior of the create method.

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