public static void main function in Kotlin

PsvmInKotlin.kt

class Foo {
    // This will not work because its not a static method!
    // You cannot annotate it with @JvmStatic (usable only
    // in objects and companion objects)
    // You have 4 options:
    fun main(args: Array<String>) {
        prinltn("This won't work as expected")
    }
    
    // this will clash with main above during compilation!
    companion object {
        @JvmStatic
        fun main(args: Array<String>) {
            println("Option 1: companion object")
        }
    }
    
    object Test {
        @JvmStatic
        fun main(args: Array<String>) {
            println("Option 2: internal object (inner static final class)")
        }
    }
}

object Test2 {
    @JvmStatic
    fun main(args: Array<String>) {
        println("Option 3: just an object")
    }
}

fun main(args: Array<String>) {
    println("Option 4: free floating function")
}