encapsulation and abstraction

Question

1:What is the difference between an encapsulation and abstraction? 2. When to use encapsulation? 3. When to use an abstraction?

Nilesh Jadav · Answer

Hey David !! Abstraction: Abstraction is "To represent the essential feature without representing the back ground details." Abstraction lets you focus on what the object does instead of how it does it. Abstraction provides you a generalized view of your classes or object by providing relevant information. Abstraction is the process of hiding the working style of an object, and showing the information of an object in understandable manner. Real world Example of Abstraction: - Suppose you have an object Mobile Phone. Suppose you have 3 mobile phones as following:- Nokia 1400 (Features:- Calling, SMS) Nokia 2700 (Features:- Calling, SMS, FM Radio, MP3, Camera) Black Berry (Features:-Calling, SMS, FM Radio, MP3, Camera, Video Recording, Reading E-mails) Encapsulation: Wrapping up data member and method together into a single unit (i.e. Class) is called Encapsulation. Encapsulation is like enclosing in a capsule. That is enclosing the related operations and data related to an object into that object. Encapsulation is like your bag in which you can keep your pen, book etc. It means this is the property of encapsulating members and functions. class Bag { book; pen; ReadBook(); } Encapsulation means hiding the internal details of an object, i.e. how an object does something. Read this Link to Know When to use Abstraction : http://www.onlinebuff.com/article_oops-principle-abstraction-in-c-with-an-example-and-explanation_5.html You can use Encapsulation in Properties [Get, Set] at that encapsulation is very useful. public class School { private string Schooldepartname; public string SchoolDepartname { get { return Schooldepartname; } set { Schooldepartname =value; } } } public class Departmentmain { public static int Main(string[] args) { School d= new School(); d.SchoolDepartname="Communication"; Console.WriteLine("The Dept. Name is :{0}",d.SchoolDepartname); return 0; } } Thank you ! Hope that Helps !!

Sujeet Suman · Answer

David I think there are many conversations, posts, blogs & articles written on Abstraction & Encapsulation difference. But very few places people cleared the things. Abstraction : - Showing only abstract model or hiding implementation complexity to user. No need to show complete implementation. Like ABSTRACT class/method and INTERFACE. Encapsulation : - It is keeping data & function in a container called class so that we can maintain the accessibility of class/method/property through different access modifiers. Like using PUBLIC/PRIVATE/PROTECTED/INTERNAL. If this is helpful for you then please accept my Answer .

David Smith · Answer

Thanks for the articles, but i also want to have the conversation on this thread. Could you please answer the questions.

Munesh Sharma · Answer

http://www.c-sharpcorner.com/UploadFile/annathurai/abstract-class-in-C-Sharp/

Munesh Sharma · Answer

http://www.tutorialspoint.com/csharp/csharp_encapsulation.htm

encapsulation and abstraction

Answers (5)