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Kotlin Programming: The Big Nerd Ranch Guide, First Edition
book

Kotlin Programming: The Big Nerd Ranch Guide, First Edition

by Josh Skeen, David Greenhalgh
July 2018
Intermediate to advanced content levelIntermediate to advanced
400 pages
12h 14m
English
Big Nerd Ranch Guides
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, First Edition

Beyond Classes

Kotlin affords developers greater flexibility with respect to the format of the code that they write. A Kotlin file can include classes, functions, and variables – all at the top level of the file. In Java, a file represents exactly one class. How, then, are top-level functions declared in Kotlin represented in Java?

Expand the interspecies communication with a proclamation from the hero. Declare a function called makeProclamation in Hero.kt, outside of the main function that you worked in before.

Listing 20.17  Declaring a top-level function in Kotlin (Hero.kt)

fun main(args: Array<String>) {
    ...
}

fun makeProclamation() = "Greetings, beast!"

You will need a way to invoke this function from Java, so add a ...

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Publisher Resources

ISBN: 9780135165188