There are three major features in object-oriented programming that makes them different than non-OOP languages: encapsulation, inheritance and polymorphism ... data types are called "classes ...

An abstract class is a template definition of methods and variables in a specific class, or category of objects ... security and avoids unintended data corruption, while also making code easier to ...

An introduction to the principles of object-oriented programming. It covers both object-oriented programming techniques and their application to program design including classes, objects and objects ...