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Object oriented programming concepts
- 1. Presentation on OOP (ObjectOriented Programming) Presented by RD
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- 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 OfObject Oriented Programming Objects Classes Data Abstraction Encapsulation Inheritance Polymorphism Dynamic Binding Message Passing
- 5. • They mayrepresent 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
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- 8. • A classis 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.
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- 10. “A data abstractionis 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 OfData And Its Background Detail Output
- 12. Encapsulation • Encapsulation isthe 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 ofderiving 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
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- 17. Inheritance Point Line Parent class Or Base class Childclass Or Derived class
- 18. • Polymorphism isan 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 meanslink 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 • Objectscan 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 classesproduct 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) { }
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