OOP 5 | Abstract Classes, Interfaces, Annotations

This fifth video of the complete object oriented programming (#OOP) course in Java will clear some of the most important concepts for you about multiple inheritance.

Covering abstract classes, interfaces, annotations, and more!

Take part in the learning in public initiative! Share your learnings on LinkedIn and Twitter with #DSAwithKunal & don't forget to tag us!

👉 Resources

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Timestamps:
0:00:00 Introduction
0:00:30 Multiple Inheritance Problem
0:01:08 Abstract Classes
0:06:38 Example of Abstract Classes
0:16:45 Abstract Constructors
0:17:15 Object of an Abstract Class
0:17:40 Abstract Static Methods
0:18:04 Static Methods in Abstract Classes
0:21:52 "final" Keyword in Abstract Class
0:24:18 Multiple Inheritance using Abstract Classes
0:25:10 Interfaces
0:31:29 Example of Interfaces
0:43:41 Variable of Interface Type
0:47:42 Separate Classes in Same Interface
0:55:01 Extending Interfaces
0:57:18 Annotations
1:02:05 Important point regarding Static Interface methods
1:06:17 Nested Interfaces
1:09:31 Outro

#placement #dsa #interviews

[piyush]

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[harshsolanki]

This was the hell of a video. Literally THE BEST video for OOP.
OOP couldn't be explained any better than this. 🔥🔥

[bjugdbjk]

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[jomamusk]

There can never be a better example than the MyCar Example. What and example! Most concepts Kunal taught till now are there in this single example. You are the Best!!!!

[shubhamagarwal]

Kunal I am having 2.5 years of experience in IT and now preparing for a job switch. I am following all your videos religiously. The content you are providing is just priceless. Your way of teaching is so lucid that nothing else than series is required. I am so much enjoying it like a web series, and yes learning was never so much of fun. I India I think we need no college we only need Kunal to make quality engineers. In college they cannot make these these things clear in 4 years and you did it in just 40 min.
God bless you . Keep sharing your learnings .

[akshaytakrani]

Ocean of knowledge in this video about Interfaces and Abstract classes. Love the way you teach ❤

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exact at 12:13 Kunal just thought of his love😍

[hariaseri]

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[mightymiller]

the pause Kunal taken when he had to think of a girl name was hilarious 😂😂😂

[somnathpatil]

Wow, Kunal! Your explanation of OOP is absolutely phenomenal. You made complex concepts so easy to understand with your clear and engaging teaching style. I've struggled with these topics before, but your video made everything click. Thank you for making learning so enjoyable and accessible.
Thank you .

[anchitsingla]

Woah! 2 videos in One day....Great work and Thanks again a lot for this course.. ❤️

[FactoFacts]

Kunal Bhai, your videos are absolutely amazing! They are so good because I watched 4 to 5 interview videos from different companies, and honestly, I was able to answer almost all the questions. Whenever I don’t understand a concept from your videos, I simply watch it 2 to 3 times, and it becomes crystal clear. Thank you so much for that, bro! I genuinely feel that such quality content is hard to find on YouTube. Keep up the great work!"

[avinashsingh]

Thankyou so much Kunal this is the best video i found on abstract classes and interfaces. Learnt a lot from this. ;)
Message to fellow people just stay away from involving in controversy. Our main motive should be to learn from anywhere we can.
Thankyu kunal for providing top-notch content on OOP.

[parth_chovatiya]

1:02:11
Static method can inherited
If you declare, another static method with same signature in derived class than the static method of superclass will be hidden, and any call to that static method in subclass will go to static method declared in that class itself.

[rohanbhujbal]

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[HARSHKUMAR-gdu]

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[flyfly]

Hi Kunal, I recently founded your channel, I like the way you explain the core concepts.
It's really very helpful. Thank you so much. Please keep this continue

[subhrajyotidas]

that car interface explanation was just fabulous!

[AjitKumar-gnse]

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[shantsssss]

This is THE BEST COURSE of OOPS on YouTube