P37 - Abstract Class in Java | Core Java | Java Programming |

In this video, I have explained about "Abstract Class in Java".
Points covered in this video:
❇️ What is an abstract class?
❇️ When to use & how to use/create an abstract class?
❇️ Can we create an instance of abstract class?
❇️ Can we have non-abstract methods inside abstract class?
❇️ Can we extend multiple abstract classes into a single class?
❇️ Can we implement the abstract class like an interface?
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Java programming by Yadagiri Reddy

[@HYRTutorialsTelugu]

↔ Core Java in Telugu Playlist link: bit.ly/3KMlbBk
✴ Checkout my other playlists: bit.ly/3gLIAVL
☕ Buy me a coffee: bit.ly/33ljBWc

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Create an interface Shape with a method calculateArea() that returns a double. Then create classes Circle and Rectangle that implement the Shape interface. Implement the calculateArea() method for both classes.
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Interface lo method abstract he na buddy? If it's abstract then you will get an option to implement that method

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Hii sir we all are love u your way of explanation 💕 sir ,very easyly understandble explanation, i have a one doubt sir ,in abstract class we are implementing all methods there is a no single abstract method in that abstract class that means abstract class acts like as a class but why we can't creat instance(object) that type of abstract classes. I am a new subscriber in your channel i was saw many TH-cam channel but knowone can't explained like you sir tq u for giving free contents sir.

[@HYRTutorialsTelugu]

Abstract class lo we may have abstract methods so anduke java doesn't allow us to create an object for that. Java doesn't know whether you implemented all the methods in abstract class or not. It goes with rules like if it is a abstract class then it will simply doesn't allow you to create an object

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Hi, 1)can we declare variables inside interface and abstract class? 2)As you said After Java 8 version, we interface can have non abstract methods, so why I should go with the abstract class?

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Yes I also this doubt

[@HYRTutorialsTelugu]

Somehow I missed this comment from my list buddy. Now iwas checking all the comments which were not replied and this one popped.
because upgrade of projects chesinappudu manaku adi support cheyyali and ade vidanga abstrct class meaning anedi veru kada so entha manaku interafce vaatini allow chesinaa manam epdu ina partial implementation provide cheyyali ante interafce ni change cheyyakunda abstractclass ni create cheskochu buddy.
for eg: A ane oka company already konni interfaces ni provde chesindi and andulo elanti implementation kooda ledu. and B ane company partial ga aa interfaces ni implement cheyyali anukundi so apddu B ane company original ga unna interfaces ni change cheyyakoodadu but they can create an abstract class and continue the development

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Sir can you Explan About Association, Aggregration , composition ?

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Sir, please upload Synchronization topic

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Every video lo cover chesthune unna kada buddy

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sir for suppose lenovo and hp don't know implementation of copy and paste, then we can write the implementation for copy and paste in Sampleab class and simply extend it to lenovo and hp classes right sir? After extending we can simply implement Laptop interface without using abstract class(public class Lenovo extends Sampleab implements Laptop).

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super

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[@MaheshGouni]

sir but interface lo unna remaining abstract methods in ala implimentation cheyali ,we already extends class kadha ,manam extend and implimentation at a time cheyoccha ?

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yes we can do that buddy

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Hii bro any plannings to do spring & spring boot classes , if you have time please do for us because your explanation is too good and easy understandable thank you

[@HYRTutorialsTelugu]

No plan buddy 😔

[@nishits270]

Sir.. As u hav said ,Java doesn't allow multiple inheritance at class level..but it can be allowed at interface level..but after Java 8 version there might be implemented methods in interface..if 2 interfaces contain similar implemented methods how can we achieve multiple inheritance

[@HYRTutorialsTelugu]

That's a very good question and I have parked that question for part 2 buddy

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Guruji🙏

[@HYRTutorialsTelugu]

Thanks buddy 🙂

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Hi sir this is charan could u explain how to implement multiple inheritance using interfaces

[@HYRTutorialsTelugu]

Explained everything in the interfaces concept buddy

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super boss
pls BDD & CUCUMBER telugu lo pettandi
pls

[@HYRTutorialsTelugu]

Will take time buddy

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for the abstract class we cannot create instance , but u have created in instance??
for the lenova

[@HYRTutorialsTelugu]

That's why watch the video fully without skipping buddy

[@sankeerths]

Sir, Abstract classes are initialized through anonymous inner class, how is this possible can you plz explain what is anonymous inner class and things.

[@HYRTutorialsTelugu]

Dont worry at this stage buddy. this concept is covered in later classes

[@sankeerths]

@@HYRTutorialsTelugu sir can you plz mention in which lecture this section covers, so that will go through it.