no main class detected

[archsky]

while trying to run a very minimal helloworld from sbt documentation

object Hi {
  def non_main = println("main is a method, not a class")
}

sbt run said

[error] (compile:run) No main class detected.

But clearly, main is a method.

o_O ?

[Jason Zaugg]

object Hi {
  def main(args: Array[String]): Unit = { println("this is an executable class") }
}

Or, with a shorthand:

object Hi extends App {
  println("this is an executable class")
}

​

-jason

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[archsky]

Oops. I think I didn't communicate the point well.
My thing was with the response that the sbt console gives, in which it refers main as a class, while main is a method. Maybe sbt console should say, something like, no main method detected.