Scala regular Exercise B

Package Com.hengheng.scalaclass Point (Val x:int, Val y:int) {val Isoriginal:boolean = {   x = = 0 && y = = 0}}class Talkpoint (x:int, Y:int) extends point (x, y) {  def talk () = {    println ("My position is (" + x + "," + Y + ")")  }}class happytalkpoint (x:int, Y:int) extends Talkpoint (x, y) {  override Def talk () {    println ("I ' A M happy! ")    Super.talk ()  }}abstract class Animal {  def walk (Speed:int)    def breathe () = {    println ("Aninamal Breathes. ")  }} Class Dog extends Animal {  override def walk (speed:int) = {    println ("Dog walks, speed are" + speed)  }}obj  ECT application{  def main (args:array[string]) {   val p = new Point (0, 0)   println ("point info" + p.x + "," + p.y + ")")   println (p.isoriginal)   val pp = new Talkpoint (3,4)   Pp.talk ()   val PPP = new Happytalkpoint (0, 0)   Ppp.talk ()   val d = new Dog ()   D.walk (Ten)   d.breathe  }}

Output:

Point info (0,0)
True
My position is (3,4)
I ' am happy!
My position is (0,0)
Dog walks, speed is 10
Aninamal breathes.

Scala regular Exercise B