[OOP] The Four Core Principles of OOP

•Abstraction

•Define a concept, unrelated to a concrete instance.

 

•Encapsulation

•Hide implementation details (Fields cannot be overridden!).

 

•Inheritance

•Extend classes to reuse code (inherit behavior), is-arelationships.

 

•Polymorphism

•Replacing functionality in specializations. Dynamic selection of methods.