I just created a kotlin project, and when trying t...

# getting-started

[reactormonk]

I just created a kotlin project, and when trying to run, it tells me MainKt could not be found. Creating class MainKt { fun main() { ... } } gives me a duplicate class MainKt 🤔

[Stephan Schröder]

when you use a first-class main-function in a main.kt file the generated jdk-bytecode will be equivalent to a public static void main function in a class called MainKt.

[reactormonk]

Doesn't seem to exist on run, had to manually make a @JvmStatic etc.

[chrisjenx]

Your Main.kt file should contain:

import ....

fun main() {
 // start code here
}

Clicking the run arrow next to the function should run everything fine, unless you changed something wierd in the gradle config

[gildor]

You should never create classes like MainKt
Classes with Kt suffix are generated for compiler for top level members (so functions, properties which are declared outside of an actual class)
So if you have a file Main.kt with any top level function (like main() compiler will create class MainKt for it

So looks that your config looks for MainKt class (this how it usually configured for Gradle), what you need to do is follow Chris' suggestion

[reactormonk]

Clicking the run arrow next to the function should run everything fine, unless you changed something wierd in the gradle config

Nah, got the error straight out of the gate

[reactormonk]

version 2025.1.3

[gildor]

what kind of error?

[reactormonk]

The MainKt could not be found

[reactormonk]

Huh, can't reproduce with a new project

[gildor]

maybe your run configuration is incorrect, you can delete it first and add again