Object oriented programming

Question

Can someone please help me understand OOP in java please I cannot understand it Its really hard.

Answer 1

Hi Miller Monteiro
Hope this is helpful for your concerns about Oop in java.

https://javagoal.com/oops-concepts-in-java/

Also check this out:
https://www.sololearn.com/Discuss/252198/?ref=app

Answer 2

Java is an object oriented programming

Features

Classes and objects
Encapsulation
Abstraction
Inheritance
Polymorphism

Class :
collection of methods and variables
collection of objects
class is a modification to structures in c/cpp
We cannot see class

Object :

Realtime entity
Realtime existance
We can see object

A class can have any no of objects
Object refers to only a class

Encapsulation : binding of data and methods is known as encapsulation

We can achieve encapsulation id there is a class

Abstraction : hidhing internal implementation of class and exhibit only functionality

Inheritance : creating a new class from existing class

Existing class is superclass
New class is subclass
A superclass can have more than once child

A child can have only one parent

Types of inheritance

Single : a class is inheriting only 1 class
Multiple : a class is inheriting from more than a class
Multilevel : a class named “x” is subclass to previous class and superclasd to upcoming class

Answer 3

Continution

Hierarchical : a class is inherited by more than ond class
Hybrid : ckmbination of 2 of more inhetirances

Polymorphism

Seeing the same thing in different way
Manyforms

Types

Overloading : method name is same but there is a difference in

No of parameters
Types of parameter
Order of parameter

Overriding : subclass is not feeling well with the definition given by superclass
Subclass will give its ownnimplementation