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Mastering Kotlin Essentials

Interfaces

Discover Kotlin interfaces and define properties and methods for class implementation and conflicts in multi-interface scenarios.

We'll cover the following...

Defining interfaces

An interface defines a set of properties and methods that a class should have. We define interfaces with the interface keyword, a name, and a body with the expected properties and methods.

Kotlin 1.5
interface CoffeeMaker {
    val type: String
    fun makeCoffee(size: Size): Coffee
}

Implementing interfaces

When a class implements an interface, this class has to override all the elements defined by this interface. ...