How to truncate a BigDecimal without rounding

java rounding bigdecimal arithmeticexception
JJ180 picture JJ180 · Jun 17, 2014 · Viewed 47.9k times · Source

After a series of calculations in my code, I have a BigDecimal with value 0.01954

I then need to multiply this BigDecimal by 100 and I wish the calculated value to be 1.95

I do not wish to perform any rounding up or down, I just want any values beyond two decimal places to be truncated

I tried setting scale to 2, but then I got an ArithmeticException saying rounding is necessary. How can I set scale without specifying rounding?

Answer

GriffeyDog picture GriffeyDog · Jun 17, 2014

Use either RoundingMode.DOWN or RoundingMode.FLOOR.

BigDecimal newValue = myBigDecimal.setScale(2, RoundingMode.DOWN);

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