In object-oriented programming, we sometimes say that when type A extends type B, that type A is-a type B. (More about this in a moment.) This example also demonstrates polymorphism, which is one ...

A programming language structure wherein the data and their associated processing ("methods") are defined as self-contained entities called "objects." Becoming popular in the early 1990s and the ...

Because so much of this programming style involves objects ... call into play two of the most powerful features of OOP: inheritance and polymorphism. Since all of the objects represent animals ...

object oriented programming (OOP). In the first article, we covered the basics of the class data type and the history of OOP. This article uses examples to explain how to efficiently and correctly use ...

It covers both object-oriented programming techniques and their application to program design including classes, objects and objects lifecycle, abstraction, encapsulation, inheritance, polymorphism ...