Hi friends! TIL something interesting. I ended up ...

# getting-started

[Paulo Cereda]

Hi friends! TIL something interesting. I ended up writing this code (actually not this code, which is a MWE):

fun main(args: Array<String>) = runCatching { println("Hello world") }

When I ran it, I got

Error: Main method not found in class org.example.MainKt, please define the main method as:
   public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application

I then realized my main is not returning void/Unit but Result<Unit>. Adding

fun main(args: Array<String>) = runCatching { println("Hello world") }.getOrThrow()

or anything that would return Unit makes the signature match and it works. 🙂

[Jana Fürchtenicht]

You could also use curly braces instead of the expression body. Then you wouldn't need to add anything. 🙂

[Jana Fürchtenicht]

(Other than the curly braces, I mean. 😅 )

[Paulo Cereda]

Ah yes! 😁 It was a nice exercise to find out!