Possible Duplicate:
Comparing the values of two generic Numbers
I would like to compare two arbitrary instances of Number to find out which is greater. As you know, those may be Integers, Longs or Doubles but also BigIntegers or BigDecimals. So what to do?
- Number does not implement Comparable.
- Can't use
doubleValue()
as there might be a loss of precision from BigDecimals or BigIntegers.
Do I really have to go into instance-testing and casting? There must be some library that does this. But I've already checked Apache Commons and Guava with no luck.
Edit 1: Comments pointed this out: Comparing the values of two generic Numbers. It has a solution that converts everything to a BigDecimal using toString()
. Is there really no better way to do this?
Edit 2: I just posted my own version as an answer to the other question. It should be more efficient and robust than the accepted answer.