public static void main in Kotlin

You can just put the main function outside of any class.

In anyFile.kt do:

package foo

fun main(args: Array<String>) {

}

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Either main + tab or psvm + tab work if you have your cursor outside of a class.

Put it inside a companion object with the @JvmStatic annotation:

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

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