Kotlin INTERFACE example. Kotlin object-oriented programming for beginners #8.9

Kotlin android tutorial for beginners. Learn about Interface in Kotlin. How methods, variables are defined inside Interface and how to implement single and multiple Interface in a class. And how to deal with if there is a conflict of Interface.

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Let's get in touch! [Sriyank Siddhartha]

---- Thank you for your love and support ----

[rameshpithiya]

I just dropped the plan to learn kotlin because lack of some good resources but when i found your tutorials i am again putting my hands on it. Awesome experience in your tutorials.

[thomasbartke]

Awesome and very clear explanation! Thank you! The only thing you skipped is talk about why Kotlin (as opposed to Java) only allows a single abstract method in an interface. Still looking for that explanation...

[ashwyllsolutions]

This guy knows how to irrigate his community of developer herds with knowledge. Highly recommend for new pie and experienced java developers. Kotlin is more fun than java.

[vladopris]

If one class can inherit 2 interfaces, and solve the diamond problem by calling super<interface1/2>.commonMethod(), why not a class can inherit 2 normal or abstract classes and solve the diamond problem with the same solution?

[bunthaideng]

What an awesome explain!!!
#Respect the lecturer

[Effectivebasketball]

Thank you, and I will dream about the word "simply" for a year now. I may never recover after this.

[sumandas]

Wow !!!! excellent explanations .Thank you sir :)

[saurabhprakash]

Thanks for the tutorial, very easy to follow.

[blackballization]

In java it's allowed to create instance of the interface why it's not the same to java?

[viditchawda]

amazing vedio i really liked it, great job sir

[engmohamed]

Good job, but I think each property in interface is open if u initialize it but when u create it without initialization it will be abstract by default. But when I practice I found that interface can’t hold any initialized value but it can hold function with body I don’t know why. So if u know why I’ll appreciate your explain. :)

[abdulwahabhassan]

I like how he says "This compiler is not happy" whenever the compiler throws an error lol

[freecountdummy]

Hi,
I'm new in kotlin.
I get confused about "Interfaces in Kotlin can contain declarations of abstract methods, as well as method implementations. What makes them different from abstract classes is that interfaces cannot store state"
What does that means? what is different between method with body in interface and abstract class?


Thank you for such a great video

[GameCrawl]

so what is the difference between abstract class and interface?

[krishnacreation]

How to take refernece of interface in variable

[tadiyal]

Hi Sriyank i have query, if we have two interface with same abstract method when we implement these two interface than override that method is going well but when i run app its showing error( Exception in thread "main" kotlin.NotImplementedError: An operation is not implemented: Not yet implemented )

[tadiyal]

fun main(args:Array<String>)
{
var v = MyClass()
v.playButton()
v.stopButton()
}
interface FirstInterface
{
fun playButton()
fun stopButton(){
println("First Interface Player Stopped")
}
}
interface SecondInterface
{
fun playButton()
fun stopButton(){
println("Second Interface Player Stopped")
}
}
class MyClass : FirstInterface, SecondInterface
{
override fun playButton() {
TODO("Not yet implemented")
}
override fun stopButton() {


println("Normal Interface Player Stopped")
}
}

[prashantmehta]

Does super keyword is used only in overriding method?

[keystomusic]

Is there an equivalent code for in Java?

[iJuce]

Thanks for the tutorial, very easy to follow.