We will focus on the relationship between polymorphism and Java inheritance ... You can see this in the example below, featuring Duke and Juggy: public abstract class JavaMascot { public abstract ...

Inheritance and composition ... Now let’s try the same example using composition: import java.util.HashSet; import java.util.Set; public class CharacterCompositionExample { static Set<String ...

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 ... a summary of ...