java bigdecimal取整数,如何在Java中获取BigDecimal的整数和分数部分

For a BigDecimal number such as 42.7, how can I tear this apart to get the integer part (42) and the decimal fractional part (0.7)?

I would like to retrieve both as BigDecimal objects. But I will take what I can get and make BigDecimal object from them.

解决方案

tl;dr

myBigDecimal

.divideAndRemainder( BigDecimal.ONE )

[ 0 ] // for integer part

…and…

[ 1 ] // for fraction part

BigDecimal::divideAndRemainder

The BigDecimal class offers some methods for this.

The BigDecimal::divideAndRemainder method divides your original number by another number. The result is an array of two BigDecimal objects, the first being the integer portion and the second being the fraction amount.

To achieve your goal, we merely need to divide by one. The BigDecimal class offers a constant object for the value of one: BigDecimal.ON