all Kotlin classes are ultimately derived from the Any class). In other words, we’ve declared the three variables in the raw type.įor simplicity, we’ll use unit test assertions to verify if we get the expected type. Purchase the fully updated Android Studio Electric Eel Kotlin Edition of this publication. It’s worth mentioning that Kotlin’s Any is pretty similar to Java’s Object, which means it’s the supertype of all other classes.

The classic examples for the same are any, non and all functions which were added to the Iterable interface and Map interface. We should note that we’ve declared the three variables using the same type: Any. Kotlin is a powerful language that reduces a lot of boilerplate code required to perform basic operations in comparison to Java. Private val myPlayer: Any = Player('Jackson', 42, 100)Īs we can see, we’ve created three variables: one Int, one String, and one Player. Unlike Java, Kotlin doesnt differentiate primitive types and. Private val myString: Any = 'I am a string' This section describes the basic types used in programs, such as Int, Boolean, and Any. Next, let’s create some variables: private val myInt: Any = 42 Moreover, the Player class inherits the Person class and implements the Ranking interface. Open class Person(val name: String, val age: Int)Ĭlass Player(name: String, age: Int, val numberOfWins: Int) : Person(name, age), RankingĪs the code above shows, in the package, we’ve defined a Person class, a Ranking interface, and a Player class.

Kotlin any