Object Oriented Programming - Basic Concepts
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The document outlines the basics of object-oriented programming (OOP), including its distinctions from procedural and structured programming. It explains key concepts such as classes (templates for objects), objects (instances of classes), and access specifiers (public, private, protected). Additionally, it describes inheritance types, including single-level and multilevel inheritance, which allow classes to extend properties and methods from other classes.
Object Oriented Programming - Basic Concepts
- 1. Object Oriented Programming - Basic Concept
- 2. Why OOPs? 1. Procedural Programming - 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 is a 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 is the 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 the properties 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.