Kotlin Programming Cookbook

How to do it…

As we have just discussed, interfaces in Kotlin can have the implementation of methods; let's follow these mentioned steps to check that out:

1. Let's create an interface named DemoInterface:

interface DemoInterface {    fun implementatedMethod() {        println("From demo interface")    }}

Defining a method with implementation in the interface is just like you would do inside a class.

2. Now, let's see a class that has implemented the preceding interface:

class IntefaceImplementation: DemoInterface

3. Then, you can call the method like this:

fun main(args: Array<String>) {    var interfaceImplementation= IntefaceImplementation()    interfaceImplementation.implementatedMethod()}

Here's the output:

 From demo interface

4. A key benefit to this new ...