Object Oriented Programming Concepts - OOP Concepts
Object Oriented Programming(OOP) Concepts - Article which gives definitions for all 5 OOP concepts(5 pillars of OOP) which are essential to understand basics of any OOPL(like C#,VB.NET,JAVA,C++).Any OOPL should support these concepts.
Class is a definition(or description) for collection of similar objects.That is why people define class as "Collection of Objects".Class will be defined in terms of variables and functions ( or methods or procedures or sub-routines). Object is an instance of class An Object in program is required to be created in order to refer and access the real-time object through program. Object can be created by basing on its definition or description i.e., through class. The process of showing essential features and hiding unnecessary details is referred as Abstraction The process of wrapping two or more items as single element is referred as Encapsulation Note:-Data Abstraction can be achieved only through Encapsulation. Acquiring the features of already existing class(Base or parent or super class) into a newly creating class(Derived or child or sub class) is referred as Inheritance The behavior of having more than one form for any element is referred as polymorphism. POLYMORPHISM(greek term):-poly(means more)-morph(means form)-ism(ability)object oriented programming concepts - OOP Concepts
If any language is to be called as OOPL(Object-Oriented Programming Language) then it should support the following 5 concepts (pillars) of OOP.They are:-
class
object
Data Abstraction and Encapsulation
Inheritance
Polymorphism
Class:
Object
Data Abstraction and Encapsulation
Inheritance
Polymorphism
Object-Oriented Programming Concepts
If you've never used an object-oriented programming language before, you'll need to learn a few basic concepts before you can begin writing any code. This lesson will introduce you to objects, classes, inheritance, interfaces, and packages. Each discussion focuses on how these concepts relate to the real world, while simultaneously providing an introduction to the syntax of the Java programming language.
What Is an Object?
An object is a software bundle of related state and behavior. Software objects are often used to model the real-world objects that you find in everyday life. This lesson explains how state and behavior are represented within an object, introduces the concept of data encapsulation, and explains the benefits of designing your software in this manner.
What Is a Class?
A class is a blueprint or prototype from which objects are created. This section defines a class that models the state and behavior of a real-world object. It intentionally focuses on the basics, showing how even a simple class can cleanly model state and behavior.
What Is Inheritance?
Inheritance provides a powerful and natural mechanism for organizing and structuring your software. This section explains how classes inherit state and behavior from their superclasses, and explains how to derive one class from another using the simple syntax provided by the Java programming language.
What Is an Interface?
An interface is a contract between a class and the outside world. When a class implements an interface, it promises to provide the behavior published by that interface. This section defines a simple interface and explains the necessary changes for any class that implements it.
What Is a Package?
A package is a namespace for organizing classes and interfaces in a logical manner. Placing your code into packages makes large software projects easier to manage. This section explains why this is useful, and introduces you to the Application Programming Interface (API) provided by the Java platform.