OBJECT ORIENTED PROGRAMMING

Presented By-

Ashish Agrawal

Contents:-

Introduction to OOP Basic elements OOP features Polymorphism Inheritance Encapsulation Information hiding

Introduction to OOP-

Collection of interacting objects. Usually contain different type of objects each

type corresponding to a particular kind of data.

Organizes a program around it’s data(object) & a set of well defined interfaces to that data.

Describes the structure of a system in terms of objects & relationaships.

Three basic elements of OOP-

Objects

Methods or Actions

classes

Objects-

A main identity or idea. Independent with a distinct role or responsibility. an instance of a class. an employee which is real world entity we can

make an object of it and then utilize it in a program with its behaviors and actions.

All objects are distinguishable.

Methods or Actions-

Associated with the object. Depends on application. method is a subroutine (or procedure)

associated with a class. At runtime, they have access to data stored

in an instance of the class.

Class-

Contain objects with similar attributes. Define the type of their instances. Represents a noun, such as a person, place

or thing, or something nominalized. We can create any no. of objects belonging

to that class. Example-Person, process ,company are

classes etc..

OOP features-

Polymorphism-

Derive from Greek language & it means “many forms”.

One interface ,many methods. Ability to create a variable, a function, or an

object that has more than one form. Example-in a method of build(),we can make

square, rectangle , circle etc..

Polymorphism-

Inheritance-

One object require the properties of another. Properties transferred from super class to

subclass. Support the concept of hierarchical

classification. Sharing of operation & actions between

objects.

Inheritance-

Encapsulation-

Binds the data & the actions in one classor container.

mechanism for restricting access to some of the object’s components.

Protective text wrapper that prevents the code & data from being accessed by other code outside the wrapper.

Encapsulation-

Information Hiding-

ability to prevent certain aspects of a class or software component from being accessible to its clients.

protecting other parts of the program from extensive modification if the design decision is changed.

Thank You