scala自学之路-32-密封类

sealed abstract class Furniture

case class Couch() extends Furniture

case class Chair() extends Furniture

object SealedDemo {

def findPlaceToSite(furniture: Furniture): String = {

furniture match {

case a: Couch => "lie on the couch"

case a: Chair => "lie on the chair"

// case _=>"default"

}

}

val chair = Chair()

def main(args: Array[String]): Unit = {

println(findPlaceToSite(chair))

}

}