Scala example source code file (matchnull.scala)

This example Scala source code file (matchnull.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

any, anyref, anyref, array, array, list, string, test, test, unit, unit

The Scala matchnull.scala source code

object Test
{
  def f1 = null match { case x: AnyRef => 1 case _ => -1 }
  def f2(x: Any) = x match { case 52 => 1 ; case null => -1 ; case _ => 0 }
  def f3(x: AnyRef) = x match { case x: String => 1 ; case List(_) => 0 ; case null => -1 ; case _ => -2 }
  
  def main(args: Array[String]): Unit = {
    println(f1)
    println(f2(null))
    println(f3(null))
  }
}