SimpleExample.scala

import java.util.Date

class MeterRead(val date:Date,rawUsage:Int,val contribution:Float) {
  val usage = rawUsage / contribution

  def +(added:Int) = new MeterRead(date,(usage + added).intValue,1.0F)

  override def toString = "Read on " + date + ", usage " + usage
}

object Main extends Application {
  val read = new MeterRead(new Date,10,0.5F)
  val more = read + 10

  println(read)
  println(more)
}