Introduction to the Apex Oriented OOPs

         Before going to do coding in apex once recall the basics of object oriented programming(OOP) language concepts.
Introduction_to_OOPs

What is OOPs:

OOP (Objecte Oriented Programming) is a methodology, that provides a way of modularizing a program by creating partitioned memory area for both data and methods that can be used as template for creating a copies of such objects(Models) on demand.
    Unlike procedural language, here in oops programming language programs are organised around objects and data rather than action and logic.
The main OOPs Principles used in apex Language are,
  • Object
  • Class
  • Inheritance 
  • Polymorphism    
  • Abstraction
  • Encapsulation

Object:  In this real word Any entity that has state and behavior is known as an object.  It can be physical and logical. 
Java_Objects

Example: Ball, Pen, Book, Clock, Apple etc.

Class: Class is a Collection of objects. It is a logical entity.

Java_Class_Example

Example: Here tub is Class and ball is Object. Tub having many no of  different color balls.

Inheritance:  When one object acquires all the properties and behaviours of parent object i.e. known as inheritance. It provides code reusability. It is used to achieve runtime polymorphism.


Example: Parents producing the children inheriting qualities of the parents.  

Polymorphism: When one task is performed by different ways simply it's  called as polymorphism. we use method overloading and method overriding to achieve polymorphism.

Java_Polymorphism

Example: with one micro oven we can make different types of cakes.

Abstraction: Hiding internal details and showing functionality is known as abstraction.we use abstract class and interface to achieve abstraction.

Java_Abstraction

Encapsulation: Binding (or wrapping) code and data together into a single unit is known as encapsulation. 

Java_Encapsulation

Example: ATM machines, we don't know the inside ATM.


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Sfdc Gurukul- All in one place for salesforce and force.com step by step tutorial for beginners: Introduction to the Apex Oriented OOPs
Introduction to the Apex Oriented OOPs
Introduction to the Apex Oriented OOPs,Object oriented programming language,oops basics,what is encapsulation,what is polymorphism,what is inheritance in java,what is method
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Sfdc Gurukul- All in one place for salesforce and force.com step by step tutorial for beginners
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