string option default

  def string_Option(str: String): Option[String] = {
    val result = if (str == null || str.trim == "") None else {
      //
      Some(str)
    }
    return result;
  }

  def main(args: Array[String]): Unit = {

    val s: String = null
    val result = string_Option(s).getOrElse("default")
    println(result)
  }
  

 

  def string_default(str: String, default: String): String = {
    return if (str == null || str.trim == "") str else default
  }

  def main(args: Array[String]): Unit = {

    val s: String = null
    val result = string_default(s, "default")
    println(result)
  }