OOP Concepts are the Fundamentals of Programming Languages like Java, Python (and many others)
Here's a Dead Simple Guide to Understand It:
Here's a Dead Simple Guide to Understand It:
There are six different concepts in OOP:
1. Object
2. Class
3. Inheritance
4. Encapsulation
5. Abstraction
6. Polymorphism
Note: In this thread, we'll try to understand it from Java's standpoint.
1. Object
2. Class
3. Inheritance
4. Encapsulation
5. Abstraction
6. Polymorphism
Note: In this thread, we'll try to understand it from Java's standpoint.
1. Object
Every real-world entity is an object.
An object has Behaviour (things it does or performs) and Attributes (things that describe it).
For eg: A Chair object can have behaviour like Movement, Height Adjustment & Attributes like Color, Make & Model, and Price.
Every real-world entity is an object.
An object has Behaviour (things it does or performs) and Attributes (things that describe it).
For eg: A Chair object can have behaviour like Movement, Height Adjustment & Attributes like Color, Make & Model, and Price.
2. Class
The collection of all related objects is called a class.
Consider class as a general category which contains all the related objects inside it.
For eg: Objects like Wheelchair, Office Chair and Wooden Chair can be a part of the "Chair" class.
The collection of all related objects is called a class.
Consider class as a general category which contains all the related objects inside it.
For eg: Objects like Wheelchair, Office Chair and Wooden Chair can be a part of the "Chair" class.
3. Inheritance
The way we inherited a few qualities from our parents similarly,
a class can also inherit the qualities from a parent class.
For eg: A Phone Class can have two Child Classes: 1) TelePhone
and 2) MobilePhone. Both can inherit the "calling" behaviour.
The way we inherited a few qualities from our parents similarly,
a class can also inherit the qualities from a parent class.
For eg: A Phone Class can have two Child Classes: 1) TelePhone
and 2) MobilePhone. Both can inherit the "calling" behaviour.
4. Encapsulation
It means wrapping data into a single unit & securing it.
For eg: Drug Capsule wraps different medicines into a single unit and protects them from the outside environment.
Bank Locker wraps your valuables into a single unit(locker) and protects it via passcode.
It means wrapping data into a single unit & securing it.
For eg: Drug Capsule wraps different medicines into a single unit and protects them from the outside environment.
Bank Locker wraps your valuables into a single unit(locker) and protects it via passcode.
5. Abstraction
Hiding complexity from the user and showing only the relative stuff.
For Eg: In Car, all the complexity like the engine, machinery, etc is hidden from you; only relevant parts are shown, like the brakes, accelerator, and gearbox.
Hiding complexity from the user and showing only the relative stuff.
For Eg: In Car, all the complexity like the engine, machinery, etc is hidden from you; only relevant parts are shown, like the brakes, accelerator, and gearbox.
6. Polymorphism
It means many forms. With the same name, it provides different forms.
For eg: In Chess, we've 6 pieces - king, rook, bishop, queen, knight, and pawn. All of them "move" differently i.e. Bishop moves diagonally, Rooks move horizontally and vertically, etc.
It means many forms. With the same name, it provides different forms.
For eg: In Chess, we've 6 pieces - king, rook, bishop, queen, knight, and pawn. All of them "move" differently i.e. Bishop moves diagonally, Rooks move horizontally and vertically, etc.
All Chess piece performs a common behaviour "move" but they all do it differently.
The behaviour name "move" is the same but it's still differently done by different Objects.
The behaviour name "move" is the same but it's still differently done by different Objects.
That's a wrap!
I help people get started with Backend Development.
Follow me @vikasrajputin for more.
If you find this thread helpful then Like/Retweet the first tweet below:
I help people get started with Backend Development.
Follow me @vikasrajputin for more.
If you find this thread helpful then Like/Retweet the first tweet below:
جاري تحميل الاقتراحات...