Kotlin运行/调试配置

Question

Have created simple Kotlin project in IDEA, with only Main.kt file

When I have pressed K in margin to left of 'main', Run/Debug congiguration automatically was created

But when I run this configuration, I got error:

Invalidate IDEA cache and restart does not help.

Please suggest how can I run Main.kt ?

Answer 1

This answer relates to an earlier version of the question, which was about confusion between scripting and compiled Kotlin.

The problem

You are trying to run a Kotlin file designed for compiled mode in scripting mode.

General Info

Script mode

Scripts look like this:

val a = 8
println(a)

They also usually have the extension .kts , which is why you had issues with the file picker.

Compiled mode

Whereas what you wrote looks like this:

fun main(args: Array<String>) {
    val a = 8
    println(8)
}

These files normally have the extension .kt

Solution

You need to decide which mode you want to use, and use the appropriate file name and format for the file.