recursiveFile.scala

object Main extends App {

  import java.io.File

  implicit def convert(l: List[File]): Array[File] = l.toArray

  def print(f: File): Option[String] = {
    val name = f.getName
    if (!f.isDirectory  && name.startsWith("Test")) {
      Some(name)
    } else {
      None
    }
  }

  def scanDirectory(dir: Option[Array[File]]): Unit = {

    
    dir.getOrElse(Array[File]()).toList match {
      case h :: tail => {
        print(h).map(println).getOrElse({scanDirectory(Option(h.listFiles)) })
        scanDirectory(Option(tail))
      }
      case Nil =>
      case _ =>
    }

  }

  val dir = new File("C:/dev/projects/workspace_git/lu_p1/LU_IntegrationTests/src/test/java/org/erdf/amm/lu/test")

  scanDirectory(Option(dir.listFiles()))

}