bigdecimal.round_down
时间: 2023-04-27 13:03:34 浏览: 3306
"bigdecimal.round_down" 指的是使用 BigDecimal 类中的 round() 方法, 并将舍入模式设置为 RoundingMode.DOWN。这将导致舍去任何需要舍入的小数部分, 保留整数部分.
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BigDecimal.ROUND_DOWN
BigDecimal.ROUND_DOWN is a rounding mode used in the BigDecimal class in Java. It specifies that a number should be rounded down to the nearest digit based on the scale (number of decimal places) of the BigDecimal object.
For example, if a BigDecimal object has a value of 3.456 and a scale of 2, rounding down with the ROUND_DOWN mode would result in a value of 3.45. This means that the third decimal place (6 in this case) is ignored and not rounded up.
This rounding mode is also known as truncation or towards zero, as it simply removes any digits beyond the specified scale without rounding them up or down. It is commonly used in financial calculations where precision is important and rounding errors must be minimized.
bigdecimal.ROUND_DOWN与 BigDecimal.ROUND_HALF_UP
这是与 Java 中 BigDecimal 类相关的两个常量。
BigDecimal.ROUND_DOWN 表示向零方向舍入,也就是直接截断小数位,不进行四舍五入。例如,将 2.3456 保留两位小数,使用 ROUND_DOWN 则得到 2.34。
BigDecimal.ROUND_HALF_UP 表示标准的四舍五入算法。如果要舍弃的小数大于等于 0.5,则进位;否则直接舍弃。例如,将 2.3456 保留两位小数,使用 ROUND_HALF_UP 则得到 2.35。
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