Copies all MP3-files in a directory to another directory in a random order.

RandomCopy.scala

import java.io.File
import java.nio.file.{ Files, StandardCopyOption }
import java.util.{ Collections, Random }

import scala.collection.JavaConversions

object RandomCopy extends App {
  val src = new File("""E:\Backup\Auto""")
  val dest = new File("""F:\""")

  val files =
    JavaConversions.mutableSeqAsJavaList(src.listFiles().filter(_.getName().endsWith(".mp3")))
  val seed = System.nanoTime

  Collections.shuffle(files, new Random(seed))

  var i = 1
  val fs = JavaConversions.iterableAsScalaIterable(files)
  for (f <- fs) {
    val newPath = new File(dest, f.getName).toPath
    Files.copy(f.toPath, newPath, StandardCopyOption.REPLACE_EXISTING)

    println(i + "/" + fs.size + ", " + f.getName)
    i += 1
  }
}