import akka.actor.Actor

import akka.actor.ActorSystem

import akka.actor.Props

​

class HelloActor extends Actor {

  def receive = {

    case "hello" => println("hello back at you")

    case _       => println("huh?")

  }

}

​

object Main extends App {

  val system = ActorSystem("HelloSystem")

  // default Actor constructor

  val helloActor = system.actorOf(Props[HelloActor], name = "helloactor")

  helloActor ! "hello"

  helloActor ! "buenos dias"

}