class SizeTest {
   static void main(String[] args) {
      Mouse m1 = new Mouse();
      House h1 = new House();
      Blouse b1 = new Blouse();
      Size[] things = {m1, h1, b1};
      for (Size s:things)
         System.out.println("Weight is " + s.weight());
   }  // end of main()
}  // end of class SizeTest

interface Size {
   public double height();
   public double weight();
}
class Mouse implements Size {
   public double height() { return 5; };
   public double weight() { return 5; };
}
class House implements Size { 
   public double height() { return 7; };
   public double weight() { return 7; };
}
class Blouse implements Size {
   public double height() { return 9; };
   public double weight() { return 9; };
}