Object Oriented Programming - Basic Concepts

Object Oriented Programming - Basic Concepts

• 1.
  Object Oriented Programming -Basic Concept
• 2.
  Why OOPs? 1. ProceduralProgramming - Program executes statement by statement. 1. Structured Programming - Modular programming(Help of Function) 1. Object oriented Programming - Concept implemented with Classes & Object
• 3.
  Class ● Class isa template definition of the methods and variables in a particular kind of object. ● Class created using the Keyword class ● Class name start with capital letter and can use Camel cases for name.
• 4.
  Object ● Object isthe instance of Class. It used for access class methods and properties. ● The object is created with the help of new keyword. ● Multiple object can create single Class.
• 5.
  Access Specifiers ● Public -Publicly accessible from anywhere. - Created using keyword public we will create variables and methods. By default all method and properties are public. ● Private - Scope is only inside particular class. - Created using keyword private we will create variables and methods. ● Protected
• 6.
  Inheritance ● Accessing theproperties and methods of one from another class. ● The keyword extends is used for extending base class properties. ● Types Of Inheritance ○ Single Level Inheritance - Parent class methods will be extended by the child class. ○ Multilevel Inheritance - Parent class method will be inherited by child class and again subclass will inherit the child class method.