1. OOPs Concept in Java with Examples | 4 Pillars of Object Oriented Programming (OOPs)

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There are 4 pillars of OOPs:
- Inheritance,
- Polymorphism,
- Abstraction,
- Encapsulation.

i have all 4 in detailed with different examples. And interview questions which can be asked on top of it.

#java #objectorientedprogramming

[parthh]

00:02 Overview of Object Oriented Programming (OOPs) in Java
02:21 Real world entities have behavior (functionality) and properties
07:09 Objects in OOP have properties and behaviors
09:38 Class is the blueprint/template for creating objects.
15:00 Creating objects using the 'new' keyword in Java
17:31 First pillar of OOPs: Data Abstraction
21:49 Achieving data abstraction through interface and abstraction.
24:07 Data abstraction is essential for user interface simplicity and confidentiality.
28:37 Implement data hiding for simplified code
30:47 Data abstraction simplifies client code
35:30 Encapsulation in OOPs
37:49 Encapsulation bundles data and code into a single unit in Java OOPs
42:15 Object-oriented programming emphasizes the need for information exchange between classes.
44:39 Classes have control over their own properties and methods.
49:08 In OOPs, data can be accessed only through methods, not directly.
51:11 Data encapsulation is like keeping data inside a capsule for protection.
55:41 Understanding the concept of inheritance in Java
58:09 Car type and object creation in OOPs
1:03:25 Inheritance and method ambiguity in object-oriented programming.
1:05:53 Diamond problem in OOPs
1:10:23 Polymorphism in Java
1:12:33 Method overloading is known as static polymorphism or compile time polymorphism.
1:17:19 Method overloading based on return type is not allowed
1:19:25 Overloading vs. Overriding in Java
1:23:52 Method Overloading vs Method Overriding in OOPs
1:26:13 Inheritance and has a relationship in OOPs concept
1:30:48 Understanding 'has a' relationship in OOPs
1:33:16 Objects in OOP are strongly related and impact each other

[girishanker]

A obj = new B(); - Polymorphic Reference

It's important to note that even though the object is of type B, you are referencing it using a variable of type A. This means that you can only access the methods and fields that are defined in class A through the variable obj. If class A has methods that are overridden in class B, the version of the method in class B will be called when you invoke the method through the obj reference.
If you try to access methods or fields specific to class B using the obj reference, you will encounter a compilation error unless those methods or fields are also present in class A (or its superclasses/interfaces).
Example :-
If class A has methodA( ), methodxyz( ) and class B has method B( ), methodxyz()
& class B inherits class A.
Then, => A obj = new B();
obj. methodA( ) will invoke methodA( ) of class A
obj. methodB( ) will result in compilation error
obj. methodxyz( ) will invoke methodxyz( ) of class B ( methodxyz() is overriden in class B )

[sweetygangane]

Wish could get it before, after completing engineering... Got everything

[parthasarathimondal]

What is your view on kotlin ? You can completely write anything just using functions and achieve same functionality as class based paradigm.

[GauravKumar-byyt]

Awesome explanations...so simplified. Thanks a lot ☺️

[xamguide]

Dear @ConceptandCoding Where can i download the notes for this video

[goyaldeekshant]

nice I got a nice revision after a long one year

[indrajeetjyoti]

Can you make video on functional programming and async and reactive programming

[afsanVlog]

can we pls get the slide here as well ?Thanks

[sagarsingh-wbou]

Hi Shreyansh, have you shared this slide somewhere?

[shashankbhardwaj]

Do these videos cover whole java core. Like in this video concepts are explained in brief and there is no other video of java oops in the playlist

[krupalibhagwat]

when you upload the springboot and microservices video?

[amvasoft]

Bro nice one, but if possible please make this video like the one, you explained memory management & Garbage collection without PPTs

[souravpatra]

Hi, Plz share the slides, as it will be very helpful for revision or remember the topics

[padlebhai]

bhai kesse log ho sab bande ne itna sahi padaya aur comments mai kisi ne admire phi nni kıya bss gyan de rahe. h

[CodeWithMeee]

I am still confused, that if we can get and set values of data in encapsulation, then what does it mean that it provide security ?
please someone reply

[nandhanvarma]

Great Content. Also A Small Request From My Side. Could You Please Also Share and Design Complex MCQs Which Revolve Around These Topics Which Help in Strengthen our concepts

[kyhugji]

@sheyansh
In polymorphism, can we change access modifier and exception if any in case of overriding ?

[letscodewithshivam]

Hi Shrayansh, at 25:17 what does this user mean, is it like a client (any other application) that uses our exposed interface methods ?

[adityaagarwal]

Hi Shrayansh, have u made all the videos public or there are more vidoes in these playlist? Do i need to join to access the complete playlist