Check if BigDecimal is integer value

Question

Can anyone recommend an efficient way of determining whether a BigDecimal is an integer value in the mathematical sense?

At present I have

Answer 1

Depending on the source/usage of your BigDecimal values it might be faster to check if the scale <= 0 first. If it is, then it's definitely an integer value in the mathematical sense. If it is >0, then it could still be an integer value and the more expensive test would be needed.