#61 Abstract Keyword in Java

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Жыл бұрын

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In this lecture we will learn:
- What is Abstraction?
- Abstract method in Java
- Abstract class in Java
- Abstract vs Concrete classes
#1
Abstraction is a process of hiding the implementation details and showing only functionality to the user.
#2
Abstract method:-
- Instead of defining the method, we can declare the method.
- If we put a semicolon at the end of a method, it means that you only declare the method like:
public void drive();
- This method does not contain any features and you will not be able to create an object of it.
- You need to add an abstract keyword to only declare a method.
#3
Abstract class:-
- Abstract methods can only be defined in an abstract class.
- We need to add an abstract keyword before a class to make it an abstract class.
- Objects of an abstract class can not be created.
- If you are extending an abstract class, then it is compulsory to define all abstract methods.
- It is not necessary that an abstract class should have an abstract method.
- Abstract class can have an abstract or a normal method or both.
- An abstract class can have more than one abstract method.
#4
Concrete class: A class other than an abstract class is known as a concrete class.
- An object of a concrete class can be created.
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Пікірлер: 67

@rin_645 Жыл бұрын

You explain 600x better than my professor.

@ShubhamSingh-jx1ip Жыл бұрын

You are right

@santhosh-benz7 Жыл бұрын

😂

@a45rohitphatak42 Жыл бұрын

1000 times better than my professor.

@himrankhan8589 9 ай бұрын

so sad on you 😂

@jaisharma413 7 ай бұрын

@@ShubhamSingh-jx1ipthats why he is global mentor and teachers r still teaching in collages 😂

@sohampatel-bm7gt 9 ай бұрын

You are the best teacher. This is what happens when masters of the subject explains. The most interesting thing is that you clear the doubts and put yourself in the shoes of a student.

@fatih5454 Жыл бұрын

Thank you so much for these priceless videos. I can not thank you enough for the quality and the efficiency of your ways of explaining concepts. I am a newbie computer science student and you are basically saving my life! I am really glad that I found your channel, will recommend to any newcomers who are trying to learn concepts in computer science in the future. Thanks a lot!

@neocoretec Жыл бұрын

Joy to watch you Navin. Thank you for the videos and your time.

@hariharanrp400 5 ай бұрын

we as a community must create a abstract class called "teachLikeNavin" and every teacher must extend it so that the world develop much faster.

@vijayshankerp 3 ай бұрын

Thanks

@ramaarahatekar1570 Жыл бұрын

Mind = Blown 🎉❤😊 this lecture was very interesting!

@bhanukummaragunta498 Жыл бұрын

Your explaination was very help to gain the knowledge and understanding the subject in an easy manner

@bellowajiuolarewaju1336 Жыл бұрын

You are too good, I really like the way you explain things.

@asmshahriershuvo2272 Жыл бұрын

You explain java the way that no one can.... great

@powerbroker8055 8 ай бұрын

a great, detailed playlist every concept is explained very easily

@fatemehsalem3850 4 ай бұрын

Thanks, Navin, for your clear explanation of Abstract class. It really helped me understand.

@user-wg6ud3hh1n 7 ай бұрын

Superb explanations with examples.clearing all my doubts.

@NahidSRK Жыл бұрын

Sir .. Fast & Furious 7 .. Mv Name 🙃🙃 .... Car Jumped From 1 Building To Another Building There .. Transporter 2 Also Has The Same Scene I Guess 🙃 ...

@gayatribagul2008 Жыл бұрын

Keep going! these videos are amazing and really helpful 😇

@sindhurar2804 5 ай бұрын

Your explanation give a very clear understanding about the concepts without any doubt thank you so much sir

@pakistaninsaudi 5 ай бұрын

one think i like the most about you is how humble are you 🎉

@molinduachintha5375 Жыл бұрын

The movie is fast and furious right sir??😁

@hesaradinal275 9 күн бұрын

Thanks 😊👍 very much sir. Your explanation easily to understand.

@iam_robinroy Жыл бұрын

Your lectures need more likes😍🎉

@jaypople8885 10 ай бұрын

What an explanation 😍😍

@sonamohialdin3376 Жыл бұрын

So good tutorial thank you

@anupam6045 Ай бұрын

thank you so much for million dollar explanation sir

@mainframecoding5038 Жыл бұрын

good explaination sir jii

@user-yf5xs2zf5l 3 ай бұрын

Thank you . Well explained

@idocoding2003 5 ай бұрын

💯 👌. This is amazing

@alwaysrich9327 Жыл бұрын

Thank you ☺️

@vajrakowtilyab4822 12 күн бұрын

Thank you sir

@haleemasadiya4054 7 ай бұрын

SIR CAN YOU PLEASE MAKE A VIDEO ON WHAT SOFTWARE YOU ARE USING AND HOW TO INSTALL IN ON MAC OS SPECIFICALLY,IT WOULD BE A GREAT HELP

@mulugetaayalew5779 Жыл бұрын

thank you.

@user-mt1uz4kj3c 3 ай бұрын

Hi Navin, I have a doubt. There should be one abstract method inside the abstract class to call it an abstract class right? Correct me if i am wrong. Thank you

@samad8906 Жыл бұрын

There is not even a 1% that i didn't understood Perfect 👍

@manchikatlamukeshchandra5799 Ай бұрын

what is the use of this topic and its applications

@krishlodha1503 Жыл бұрын

Well explained. Easy to understand. I just have one doubt, why do you add the "x:" while Printing anything?

@ktylodon 3 ай бұрын

it's default from the IDE - vscode extension

@navyaongolu3758 Жыл бұрын

How can we perform expilicity

@thaltejblues 4 ай бұрын

thank you

@roopad2031 Жыл бұрын

When a class is abstract without any abtract methods and having only normal methods. Then how to access those methods as we cannot create an obj for abstract class.. please clarify this Navin

@adarshmishra4332 Жыл бұрын

Create a dummy class that extends the abstract class.

@RajKumar-mv6om Жыл бұрын

He is discussing about a car and then google provides you with a advertisement of a car🤣

@siddheshmahadik6921 5 ай бұрын

Very nice

@divya.d6049 Жыл бұрын

ur laughing is beautiful sir😜

@start1learn-n171 4 ай бұрын

@ronatkumarmuni4076 7 ай бұрын

Do you have MG Commet

@anasakd8494 9 ай бұрын

which platform are you using for coding?

@Aviation169 9 ай бұрын

VS code

@amkamk3297 Жыл бұрын

Bro. Your channel name is expressing that you telugu language. Is it right??

@nafisnawalnahiyan5032 6 ай бұрын

the movie name is Fast & Furious :p

@MohammadKhan-ld1xt Жыл бұрын

Why can we not create the method drive in the wagonR method rather than declaring it in the parent abstract class. Then we wont need to have the concept of abstract . Can someone pls explain ...

@sachinkhatri1077 Жыл бұрын

Suppose u create a shooting game in which u must have a gun which has some properties and function. Like shooting damage recoil control. In abstract class u create only method for gun but not defined and other class must have to override it and create a method for this according to guns like akm has different properties. Now suppose in new update u introduced a new gun with different functions now its compulsory to u to override parent class method and define it again according to your new gun. I hope u understand this example.