Mastering Kotlin

Renaming a generated class name for top-level properties

Using the @JvmName annotation to control how generated classes are named works for features such as top-level properties and extension functions as well. In the following code snippet, we've declared a top-level property named screenCount:

// Constants.ktvar screenCount = 0

We can then reference screenCount from Java by referencing the default class name that's generated; in this case, this is ConstantsKt:

// Main.javapublic class Main {    public static void main(String[] args) {        GreetingsHelper.sayHello("Nate");        ConstantsKt.getScreenCount();    }}

By adding the @JvmName annotation, we can change the generated class name from ConstantsKt to Constants:

@file:JvmName("Constants")// Constants.kt ...