public Mouse birth(){
  Random random=new Random();
  int godSeed=random.nextInt() % 3;
  if (godSeed == 0) {
    return new WhiteMouse();
  }
 else   if (godSeed == 1) {
    return new BlackMouse();
  }
 else {
    return new DeadMouse();
  }
}

public Mouse birth ( ) { Random random = new Random ( ) ; int godSeed = random . nextInt ( ) % 3 ; if ( godSeed == 0 ) { return new WhiteMouse ( ) ; } else if ( godSeed == 1 ) { return new BlackMouse ( ) ; } else { return new DeadMouse ( ) ; } }
birth a mouse , maybe white / black / dead mouse .
