BigDecimal rounding standards on currency
Howdy everybody! I have been using BigDecimal for a few functions run on currency. I have used it for every intermediate operation and now need to display the final product. What is the standard for rounding? I get that it should be an easy round to 2 decimals for USD, but is the rounding strategy generally to truncate, always round up, or round even?
I have tried finding an answer online and there doesn't seem to be a legal standard or anything like that, but I would assume there is with taxes right? All input is appreciated!
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I think by default, it fails (exception) in case it needs rounding
but you can reconfigure that with a
MathContextThank you for the response!
I am trying to use
receipt.setGrandTotal(receipt.getGrandTotal().scale(2, RoundingMode.HALF_EVEN));
which uses a RoundingMode ENUM because the BigDecimal.HALF_EVEN has been depreciated. This is giving an error which makes me think I am using scale wrong. How does a MathContext fit in?
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MathContext allows you to configure the amount of digits etc
if I recall correctly
What error are you getting?
RoundingMode should be correctSince BigDecimal is immutable would i need to do something like
return MathContext(2, HALF_EVEN, myDecimal)
On compile
required: no arguments
found: int,RoundingMode
reason: actual and formal argument lists differ in length
but every example I can find online says use scale instead of round
MathContext mc = new MathContext(2, RoundingMode.HALF_EVEN);
receipt.setGrandTotal(receipt.getGrandTotal().round(mc));
results in
2.1E+2
but I am only wanting to round for the decimals not the total sigfigs
use setScale instead of scale?
I am dumb i need to use set scale
lol good call i just realized
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