java.lang.ArithmeticException : Non-terminating decimal expansion

Question

if (builderAggregateCalculationsType == AggregateCalculationsType.AGGREGATE_AVERAGE) {
            BigDecimal quarterDivisor = new BigDecimal(3);
            quarterDivisor = quarterDivisor.setScale(
                    aggregateCalculationsNumberOfDecimalPlaces,
                    RoundingMode.HALF_UP);
            firstQuarterSum = firstQuarterSum.setScale(
                    aggregateCalculationsNumberOfDecimalPlaces,
                    RoundingMode.HALF_UP);
            secondQuarterSum = secondQuarterSum.setScale(
                    aggregateCalculationsNumberOfDecimalPlaces,
                    RoundingMode.HALF_UP);

            firstQuarterSum = firstQuarterSum.divide(quarterDivisor);
            secondQuarterSum = secondQuarterSum.divide(quarterDivisor);

        }

Answer 1

问题是因为除法结果产生一个非终止分数。像 1/3 这样的东西会产生 0.3333.... ，它不会终止。

如果您可以允许一些错误，您可以指定 RoundingMode 并使用它，

firstQuarterSum.divide(quarterDivisor, RoundingMode.HALF_UP); // Or any other rounding mode you prefer.