Scala for impatients, chapter 5, 4th task

gistfile1.txt

class Time( private val _hour: Int, private val _minute: Int ) {
  private val time = _hour * 60 + _minute;

  def hour = _hour
  def minute = _minute

  def before( other: Time ) = other.time > time

  override def toString(): String = hour + ":" + minute
}

val time1 = new Time( 1, 10 )
val time2 = new Time( 2, 10 )
val time3 = new Time( 1, 11 )

println( time1 + " before " + time2 + "? " + time1.before( time2 ) )
println( time2 + " before " + time1 + "? " + time2.before( time1 ) )
println( time1 + " before " + time3 + "? " + time1.before( time3 ) )
println( time3 + " before " + time1 + "? " + time3.before( time1 ) )