Function with 0 parameters.

In the following example the definition of currentSeconds is a shorthand for the anonymous class definition anonfun0:

  object Main extends Application {

    val currentSeconds = () => System.currentTimeMillis() / 1000L

    val anonfun0 = new Function0[Long] {
      def apply(): Long = System.currentTimeMillis() / 1000L
    }

    println(currentSeconds())
    println(anonfun0())
  }