Scala中的getter和setter

test source code:

/* 2015-09-14 15:36PM */
package test {
  class Counter {
    private var value = 0 // or else value will be treated as NaN
     def add() { value += 1 } // default: public
     def current = value // here I define a method without (),
                         // this forces the method caller to also call it without ()
     
     def printArgs(args: Array[String]): Integer = {
      args.foreach(println)
      return args.length
     }
     
     var public_value = 1
  }
 
  object jerry extends App {
    val counter = new Counter
    println("current: " + counter.current);
   
    val array = Array("1","2","3")
    println(counter.printArgs(array))
   
    counter.public_value = 41
    println(counter.public_value)
  }
}