Can't run Kotlin project (no Run menu)

Question

I create Kotlin/Gradle project like this:

Then I create src.main.kotlin.Main.kt class with main method

But I cant' run it. No found menu Run in context menu

Answer 1

It should be like this:

class Main{
    companion object {
        @JvmStatic
        fun main(args: Array<String>) {

        }
    }
}

Answer 2

Another approach

fun main() {
    println("Hello World!")
}

Remove class Main in the top of file Main.kt