Functional Kotlin

Object declarations

An object can also have a name. This kind of object is called an object declaration:

object Oven {  fun process(product: Bakeable) {    println(product.bake())  }}fun main(args: Array<String>) {    val myAlmondCupcake = Cupcake("Almond")    Oven.process(myAlmondCupcake)}

Objects are singletons; you don't need to instantiate Oven to use it. Objects also can extend other types:

interface Oven {  fun process(product: Bakeable)}object ElectricOven: Oven {  override fun process(product: Bakeable) {    println(product.bake())  }}fun main(args: Array<String>) {    val myAlmondCupcake = Cupcake("Almond")    ElectricOven.process(myAlmondCupcake)}