Scala for impatients, chapter 5, 1th task

gistfile1.scala

class Counter {
  private var counter: Int = 0;

  def increment(): Int = {
    if ( counter == Int.MaxValue ) {
      counter = 0
    } else {
      counter += 1
    }
    counter
  }

  def current = counter

  def current_= ( value: Int ) {
    counter = value
  }
}

var myCounter = new Counter()

myCounter.current
myCounter.increment()
myCounter.current

myCounter.current = Int.MaxValue
myCounter.current
myCounter.increment()
myCounter.current