2.6 – Generalization

Inheritance is used to describe the relationship between classes. What are the three ways in which this relationship is advantageous?

 - Subclasses that inherit from the same superclass include attributes and behaviors from the superclass.

 - Changes can be made easily and quickly to a large group of subclasses by making changes to the superclass they inherit from.

 - Code can be reused through inheritance, which means we do not need to re-implement behaviors that already exist.

 

Inheritance and methods exemplify the generalization design principle. There are techniques that left us apply a rule called D.R.Y., which stands for "Don't Repeat Yourself"

 

Generalization will help you build software that is easier to expand, easier to apply changes to and easier to maintain.