Converting hex string and byte array by Scala fixed

Converting hex string to byte array, and byte array to hex string by Scala. Fixed to remove string except hex.

object HexBytesUtil {

  def hex2bytes(hex: String): Array[Byte] = {
    hex.replaceAll("[^0-9A-Fa-f]", "").sliding(2, 2).toArray.map(Integer.parseInt(_, 16).toByte)
  }

  def bytes2hex(bytes: Array[Byte], sep: Option[String] = None): String = {
    sep match {
      case None => bytes.map("%02x".format(_)).mkString
      case _ => bytes.map("%02x".format(_)).mkString(sep.get)
    }
    // bytes.foreach(println)
  }

  def example {
    val data = "48 65 6C 6C 6F 20 57 6F 72 6C 64 21 21"
    val bytes = hex2bytes(data)
    println(bytes2hex(bytes, Option(" ")))

    val data2 = "48-65-6C-6C-6F-20-57-6F-72-6C-64-21-21"
    val bytes2 = hex2bytes(data2)
    println(bytes2hex(bytes2, Option("-")))

    val data3 = "48656C6C6F20576F726C642121"
    val bytes3 = hex2bytes(data3)
    println(bytes2hex(bytes3))
  }

}

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