8.20 What is Interface in java with example

[@praveenhitnalli]

One of the best teaching / presentation on this Java Interface. None of the book can replace your this presentation. Thanks a ton ... you're really doing a great job. Well explained. Keep going :) Key take away from this session for me is "A obj = new B();" . Since many days I was always wondering in Selenium Webdriver why we always use "WebDriver driver = new FirefoxDriver();" not ""WebDriver driver = new WebDriver();". This is called INTERFACE and importance of this in WebDriver, which is an API. Thank you again for your efforts on making these sessions.

[@itsme4unas]

I agree..Quality stuf

[@usfeb14]

You made my day with your above example :)

[@zehra._153]

This is sooo true 💯💯💯

[@edwintom3123]

This lecture remains unbeatable till in 2020. Hats 0ff Sir

[@mashapimatimba8063]

Brilliant... Watching this in 2020 and its helped me so much.

[@ajeenkyadeshmukh857]

Does this playlist contain both core and advance java...

[@eshwardath8182]

Me watching in 2021 😌

[@mradityapatnaik]

Remarkable !!! Never seen anyone explaining inheritance better than this.

[@shreyastasamal3549]

Sir, this is one of the best tutorials, I've programmed in android and learned the concept from various sources and books but your explanation is super clear. The concepts are much clearer than before.

[@rukshanarizyan7931]

watching this in 2022 and still so useful. Thank you so much you literally are saving me for my exams this week. Hours of lectures simply and clearly explained in few mins

[@nithyashreenaidu8357]

you are awsome sir..watching videos in 3rd year for placements..chala thanks sir...you explain it in simple bits

[@VivekKumar-ky6tm]

You are the best java teacher I had ever seen , you are the best. Your style of teaching is best and well designed

[@aces8481]

holy this video quality is throwback for sure lol you've come such a long way

[@RohitGupta-qd7gj]

As mentioned about Security feature with interface, it is true with every class or abstract class by using the below statement: Baseclass obj= new Derivedclass() The above is true for all, not exclusively for interfaces. That means its not only interfaces that can provide security.

[@nynra6584]

Yeah! You are correct. And to mention security in the term of interface causes a beginner like me to get confused as one tries to understand the concept of interface by distinctifying this character of security belonging only to interface. Most videos are clear in Telusko but few don't quite come up to the point.

[@sumitsingh9987]

I mean , what an exceptional teacher, thankyou so very much for making it all so much easy to visualise The way you present it , is required at the schools and colleges Wish teachers also watch your videos and understand that this is the required technique of delivering it, to maximum number of students 😃😃😃👌

[@rasikadeshpande4710]

How can I thank u? Explained as nicely. Easy to learn. Thank u so much.. U r doing very good job by sharing your knowledge.

[@letsdoit6438]

No one teach better than you sir outstanding explanation

[@suyashsharma7088]

You are literally the best on KZbin for OOP! Thank you very much! :D

[@zehra._153]

Sir your explanation is awesome !!! Best among all other youtubers !!! ❤❤❤ I wish you great success ahead 🙌🙌❤

[@MsWonderlands]

loved it !! Thanks much !! Specially the How and Why of object creation referring to the Interface but the memory creation of the class that implements the Interface .

[@rameshv2762]

Excellent .watching this video in 2021 which uploaded in 2015 helping a lodddd 😍

[@sagar94525]

sir this concept was new and very awesome....thanks for tutoring us...love you..

[@cibisuren2334]

Finest java lessons! Hats off sir

[@Zeegi]

Wow.....best and amazing explaination..🔥

[@arsla_saleem8416]

ur videos are just perfect :) thank you so much :) there couldn't be any better explanation than this!! :)

[@rsphantom236]

Amazing video, this clears all the concepts. :)

[@SagarSagar-ro3fj]

Short crisp and clear in 8 mins..

[@401-vhatkaramit8]

ek number explanation diya he

[@duylai7705]

best teacher ever :D

[@mithuns8410]

Awesome every one should watch this video!!!

[@swethachelliah247]

really very helpful thank u so much sir❤️

[@sijunaaetta321]

Thank you so much for clear understanding about interface.

[@gandhimathi5093]

Thank you Sir. It is clear Explanation

[@vigneshwarvicky5048]

i can hear again for interface because u will give some real time example like method overloading, method overiding and abstract :( but really telling that your teaching is awesome

[@usfeb14]

Nice explanation. Keep it up.

[@LukaszSkyWalker]

public static void main Big extends Thx!! ;)

[@209pawan]

amazing presentataion....

[@universalstarcreations7297]

If the playlist is updated correctly it will be more easy for students to understand

[@vivekanandhan9027]

Very nice explanation. Thanks

[@RiteshKumar-ri1xq]

Superb Explaination.

[@ankit2290]

Sir..Thanks for making Java so easy. One question U said interface can't be instantiated because it can not declare anything and hence can't have constructor. Then why can't abstract class be instantiated when it can declare as well

[@satish1342]

If your stating a class as abstract ,it means you cannot instantiate it

[@abin_4857]

That's just a reference, ur creating A object with B memory.

[@SumitKumar-lj3nd]

If I am assigning a memory of new B() , to A obj. Than in the heap memory methods of B class will also be created for reference obj , how can it not access obj.display() , because in heap memory both the methods will be there.

[@bayarea2012]

Love you Man. You are good.

[@kiyadhdhanujva6688]

So helpful 👏

[@100AFRO]

watching this in 2021.. Thanks

[@aceleitlpokeri2826]

This video is quite useful.

[@aceleitlpokeri2826]

Thank you Mr.

[@siddhantpathak6289]

awesome explanation thank you sir

[@amolsarate5991]

Lay bhari sirji

[@vladanulardzic5859]

Well done ! Keep on ...

[@suminthapa7277]

Nice lecture.Thank u sir.

[@teny398]

Awesome tutorial

[@aarushigupta1106]

is the occurrence of ambiguity problem not possible in i interface if yes then what's the difference between multiple inheritance of class & interfaces

[@darshankhatri7375]

Thank you so much Sir Thanks for sharing.

[@vishnumurali522]

can we declare two methods in Interface and defining one by one like ABSTARCT CLASS? Is it possible?

[@anikettambe8147]

Sir if we cannot access obj.display() then what is the Use of Dynamic Method Dispatch.

[@shubhisrivastava3197]

hi sir, i hv a query.. In the previous tutorial i hv read that .."Its not the reference that matters,what matters is the object we create " so , in this we are creating reference of A and object of B. So, it should call show method of class B. why it is calling show method of class A ....Is it a property of interface ?

[@ApexSpeedster]

If we are using reference of parent class and creating object of child class, this is called Upcasting. In upcasting only those methods are executed which are present in parent class and is overridden in child class....and in case of interface or abstract class we are overriding the parent class methods.

[@saibalusu3139]

best teaching

[@MrAkashsanu]

is dis the property of interface sir we can make refrence of it nd the which r present in it can only be called not the derive class method

[@sasmalpayal]

Sir you said if we have Upcasting in an interface then its restricted to use the child class but its not only for interface, its also for single inheritance public class A { public void show(){ System.out.println("Hi A"); } } class B extends A{ public void display(){ System.out.println("Hi b"); } } class M{ public static void main(String a[]){ A obj=new B(); obj.show(); obj.display();// error } }

[@vinodkumarm5480]

Hi Sir, I have tried same program for the abstract as well, and the fact u said security in interface same am getting in the abstract class also, can u clear my confusion

[@ProgrammerCpp1999]

Yes I have the same doubt did you find the answer if yes then plz tell me

[@adityakaushal3955]

Fabulous sir!

[@s_ec_pro8816]

public static void main(String args ) is not there is that possible in java ????

[@i_karank]

u said in the beginning that " the class which have atleast 1 abstract method is called as abstract class". this collides with ur previous videos which says that abstract class may or may not have abstract class!!

[@bharadwaj25]

Excellent, thank you.

[@aarushigupta1106]

I got the ans is it because functions r declared only & thus definition is only one & thusno ambiguity accurs

[@bass9454]

such good tutorijalz

[@i_karank]

this ambiguity prob also occurs in c/c++ so why does c/c++ support multiple inheritance?

[@rangabharath4253]

Thank you so much 👍

[@mohammedviso2269]

great tutorial

[@rakesh4411]

really amazing....

[@saishankar3556]

how we can provide security by using interface. Kindly explain me. Thankyou

[@syedshanawaz9149]

I DO SUGGEST EVERY ONE TO WATCH THIS VIDEO

[@abhijiths148]

perfect man...

[@bhanu-06-07]

Watching after 7yrs

[@joychakraborty8533]

So its not only the property of interfaces but other class also its not about any security yes we know java is more secured but in this case its a common property of java

[@preethamm.n1161]

💞💞💞My hero🇮🇳💞💞💞💞

[@shaileshbagade8544]

methods in interface do not have any access modifiers, you wrote public there

[@rohitvishwakarma8550]

thank you sir ji

[@A2DChannel]

He did dis vid in 2012.............

[@digitalnomadg]

If Interface doesn't support creation of object then how can you write - A obj = new B();

[@rupalipatil6288]

Gautam Bhattacharya Its only create a ref of A not object ...it an object of B

[@parasarora2606]

why we not used ? private void show() { system.out.println("hi); } reply plz

[@sandipdhakal7017]

Paras Arora because we are overriding the show() of interface A..while overriding the method declaration must be same,only we can change the method definition.

[@akshaykumarsingh3637]

class A{ int i=5; } interface B{ int i=6; } class C extends A implements B{ public void show() { System.out.println(i); } } class main{ psvm(String...a){ new C().show(); }}

[@akshaykumarsingh3637]

y this arror ????

[@Purplehaze778]

It might be too late, but I believe, it's because of ambiguity that he explained in his last lecture. Class c will be confused where should it use "i" from ClassA or interface B. Also, I think defining variable/s is not a good idea in interface.

[@AadityaKavthekar]

wow, thank you! :)

[@logeshwari1795]

thank u so much

[@pratyushsingh3967]

you know how to teach

[@AjayKumar-zh1yt]

Hello! Sir. I Like the way of your explanation about the concepts. I observed here you had to channels Right. May I know Which channel is better to follow.

[@gurukirans266]

6:11 and we can do it and i love it

[@ramkanaimondal]

Sir, you look like Nadal

[@dinkusailo]

Wow..

[@eshwardath8182]

2021

[@zyro9922]

early videos

[@thaheerhussainshaik7258]

2023

[@aadityanaik1655]

If it wasnt your video i would reported it for poor quality

[@livespecimen8601]

Great job sir

[@TheCocoglam1]

thankyou so much.

[@NirajPRoxx]

Thank you sir.

[@leilasarbazi]

Thank YOU

[@kaligouthami5279]

2023