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Ashish oot


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Ashish oot

  1. 1. OBJECT ORIENTED PROGRAMMING Presented By- Ashish Agrawal
  2. 2. Contents:-  Introduction to OOP  Basic elements  OOP features  Polymorphism  Inheritance  Encapsulation  Information hiding
  3. 3. 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.
  4. 4. Three basic elements of OOP-  Objects  Methods or Actions  classes
  5. 5. 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.
  6. 6. 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.
  7. 7. 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..
  8. 8. OOP features-
  9. 9. 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..
  10. 10. Polymorphism-
  11. 11. 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.
  12. 12. Inheritance-
  13. 13. 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.
  14. 14. Encapsulation-
  15. 15. 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.
  16. 16. Thank You