We will focus on the relationship between polymorphism and Java inheritance ... To start, analyze the following code carefully: public class PolymorphismChallenge { static abstract class Simpson ...

Nesting classes is one way to better organize your code. For example ... the two are closely related. In Java, nested classes are categorized as either static member classes or inner classes.

Twenty-three years ago, in his Design Principles and Design Patterns article, Robert "Uncle Bob" Martin boiled down the Liskov substitution principle to the idea that "derived classes should be ...