NotFileException

This is a control exception that indicates the underlying filesystem object cannot be treated as a File.

IE a symbolic link maybe treated as a file in some cases but a Directory cannot. So if a file operation is attempted on a Directory a NotFileException will be thrown

To safely use File one should use the following code:

import scala.util.control.Exception._
catching(classOf[NotFileException]) opt {
  file.lines foreach (println _)
} match {
  case None => println ("Oh no the path is not a file")
  case Some(names) => println ("oh everything went as planned and we got all the lines: "+lines)
}