Scala勉強中＠コップ本　適当 ref: http://qiita.com/items/a268b00f7222eb7424e5

file0.scala

import scala.io.Source

if(args.length >0){
    for(line<- Source.fromFile(args(0)).getLine())
        println(line)
    }
}
else
    Console.err.println("please enter fileName")