basic concept of object oriented programming

1. Presentation on OOP
(Object Oriented Programming)
Presented by
RD

2. • Aprogrammingparadigmthatisfocusedon objectsand
data
•asopposedtoactionsandlogic
•Objectsareidentifiedtomodelasystem
•Objectsaredesignedtointeractwitheach other
What is OOP ?

3. • C++
• Java
• C#
• Java
• Visual Basic .NET
(VB.NET)
• Objective C
• PHP 5
• Python
• JavaScript
• Smalltalk
• Theta
• etc
Some OOP Languages

4. Basic Concept Of Object Oriented
Programming
Objects
Classes
Data Abstraction
Encapsulation
Inheritance
Polymorphism
Dynamic Binding
Message Passing

5. • They may represent a person, a place or any item
that the program must handle.
• Objects are the basic run-time entities in an object-
oriented system An object is entity that has state,
behavior and identity . there are many.
• Every object is associated with data and functions
which define meaningful operations on that object.
• Object is a real world existing entity.
• Object is an Instance of a particular class.
Objects

6. Example
Mouse is
object

7. Behavior
Left
Click
Scrolling
Right
Click

8. • A class is an entity that helps the programmer to
define a new complex data type. A class defines
the data and behavior of object . In simple words ,
a class is a collection of object of similar type.
• Classes are user -defined data types and it
behaves like built in types of programming.
• objects are variables of class.
• Once A class has been defined we can create any
number of objects for that class.

9. Class Fruit
StrawberryPineappleBanana Apple
:

10. “A data abstraction is a simplified view of an
object that includes only features one is
interested in while hides away the
unnecessary details.”
“Data abstraction becomes an abstract data
type (ADT)or a user-defined type.”
Data Abstraction

11. Example
Program Execution
Hiding Of Data
And Its
Background
Detail
Output

12. Encapsulation
• Encapsulation is the first pillar or principal
of object oriented programming.
• In simple words, "encapsulation is a process of
binding data members(variable, properties)and
member function(methods)into a single unit”
•And class is the best example of encapsulation.

14. Encapsulation
Class: student
Attributes: st_name, st_id,
(Data) branch, semester
Functions: Enroll()
Displayinfo()
Result()
Performance()

15. Inheritance
•The mechanism of deriving a new class from an old
class is called inheritance or derivation.
•“Inheritance is the mechanism to provides the
power of reusability and extendibility.”
•“Inheritance is the process by which one object
can acquire the properties of another object.”
•The old class is known as base class while new
class is known as derived class or sub class

16. Example

17. Inheritance
Point
Line
Parent class
Or
Base class
Child class
Or
Derived
class

18. • Polymorphism is an important object oriented
programming concept. This is a Greek term, means the
ability to take more than one form.
Polymorphism

19. For Example
plus '+' is used to make sum of two number as well as
it is used to combine two strings.
Operator ‘+’
5+5=10 ‘in’+’dia’=india

20. Dynamic Binding
•Binding means link between procedure call and code
to be execute.
• It is the process of linking of a function call to the
actual code of the function at run-time.
•That is, in dynamic binding, the actual code to be
executed is not known to the compiler until run-time.
•It is also known late binding.

21. Massage Passing
• Objects can communicate with each others by passing
massage same as passing massage with each other.
• Objects can send or receive message or information.
• Message passing involves the following basic steps:
-Creating classes that define objects and their behavior.
-Creating objects from class definitions.
-Establishing communication among objects.

22. consider two classes product and order. the object
of the product class can communicate with the
order class by sending a request for placing order.
Example
order. place_order(qty_in_hand):
Object name
Function or
massage Information
(Optional)
Object :order1
Massage
passing
Order_place (int q)
{
}

23. Message Passing
FacultyObjectStudentObject
MgmtObject Performance
Result
Performance

24. Thank you