Scala example source code file (objinst.scala)

This example Scala source code file (objinst.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

array, boolean, boolean, console, console, int, ntoggle, ntoggle, toggle, toggle

The Scala objinst.scala source code

/* The Computer Language Shootout 
   http://shootout.alioth.debian.org/
   contributed by Isaac Gouy (Scala novice)
*/

object objinst {
   def main(args: Array[String]) = {
      var n = toPositiveInt(args);

      var toggle = new Toggle(true);
      for (val i <- Iterator.range(0,5)) 
         Console println( toggle.activate.value );
      for (val i <- Iterator.range(0,n)) 
         toggle = new Toggle(true);

      Console print("\n");

      var ntoggle = new NToggle(true,3);
      for (val i <- Iterator.range(0,8)) 
         Console println( ntoggle.activate.value );   
      for (val i <- Iterator.range(0,n)) 
         ntoggle = new NToggle(true,3);  
   }


   private def toPositiveInt(s: Array[String]) = {
      val i = 
         try { Integer.parseInt(s(0)); } 
         catch { case _ => 1 }
      if (i>0) i; else 1;
   }
}


private class Toggle(b: Boolean) {
   var state = b;

   def value = state;

   def activate = {
      state = !state;
      this 
   }
}


private class NToggle(b: Boolean, trigger: Int) 
extends Toggle(b) {

   val toggleTrigger = trigger;
   var count = 0;

   override def activate = {
      count = count + 1;
      if (count >= toggleTrigger) {
         state = !state;
         count = 0;
      }
      this
   }
}