ActorInSingleThread.scala

import scala.actors._
import scala.actors.Actor._

object ActorInSingleThread {
  class MyActor(n:Int, single:Boolean) extends Actor{

    override def scheduler: IScheduler =
      if(single) new SingleThreadedScheduler else super.scheduler

    def act = {
      loop {
        react {
          case 'Hi =>
            try{ Thread.sleep(n*1000);}catch{case _ =>}
            println("Hi "+n)
          case 'exit => exit
        }
      }
    }
    start
  }

  def main(arg:Array[String]){
    val actors = for(n <- 0 until 10) yield new MyActor(n, arg.length>0)

    for(n <- actors.length-1 to 0 by -1){
      actors(n) ! 'Hi
    }
  }
}