Efficient BigDecimal round Up and down to two decimals

Question

In java am trying to find an efficient way to round a BigDecimal to two decimals, Up or Down based on a condition.

 IF condition true then:
    12.390 --->         


        

Answer 1

I suggest the following (standing on the shoulders of giants...):

public BigDecimal roundNumber(final BigDecimal number, final boolean isFloor){
     return number.setScale(2, isFloor ? RoundingMode.FLOOR 
                                       : RoundingMode.CEILING);
}