If the method isn't final, I would consider the possibility of implementation differences in subclasses. I am trying to think of a case where it would cause a p

If the method isn't final, I would consider the possibility of implementation differences in subclasses. I am trying to think of a case where it would cause a problem, and most of those involve methods that probably ought to be in the Rectangle class anyway (and thus could be overridden in square). To me the cleanest solution is : setDimensions(height, width) where the contract for square enforces the equality of height and width.