Object Oriented Programming

Programming paradigms based on objects and classes.

topics
topic Classes & Objects Blueprint and instance, constructors, fields, methods, and the 'new' keyword. read topic Inheritance IS-A relationship, superclass/subclass, method overriding, and virtual dispatch. read topic Polymorphism Compile-time (overloading) vs runtime (overriding), subtype polymorphism, and interfaces. read topic Encapsulation Data hiding, access modifiers (public, private, protected), getters/setters, and invariants. read topic Abstraction Abstract classes, interfaces, information hiding, and contract-based design. read topic Composition HAS-A relationship, object composition, aggregation, and favoring composition over inheritance. read topic SOLID Principles Single responsibility, open/closed, Liskov substitution, interface segregation, dependency inversion. read