Scala template method pattern

object  Template method pattern  {
    

  abstract class Template {
    

    //  Used to execute indeterminate code 
    def code()

    def getRuntime(): Long = {
    
      val start = System.currentTimeMillis()

      code()

      val end = System.currentTimeMillis()

      end - start

    }

  }

  class ForDemo extends Template {
    
    override def code(): Unit = for (i <- 1 to 10000) println(s"Hello, Scala:${i}")
  }

  def main(args: Array[String]): Unit = {
    
    val fr = new ForDemo
    val time = fr.getRuntime()
    println(time)
  }

}