Java BigDecimal 四舍五入

import java.math.BigDecimal;

public class NP_BigDecimal {
    public static void main(String[] args) {
        /**
         * values are String's type.
         */
        BigDecimal a = new BigDecimal("1");
        BigDecimal b = new BigDecimal("8");

        /**
         * show "+  -  *  /"
         */
        BigDecimal result;
        result = a.add(b);
        result = a.subtract(b);
        result = a.multiply(b);
        result = a.divide(b, 2, BigDecimal.ROUND_HALF_DOWN);

        System.out.println(result);

        /**
         * 四舍五入
         * 2 为保留多少位小数，BigDecimal.ROUND_HALF_DOWN 为 四舍五入的参数
         */
        result = result.setScale(2, BigDecimal.ROUND_HALF_DOWN);
        System.out.println(result);

    }

}

来源：CSDN

作者：Yuanxuan0210

链接：https://blog.csdn.net/m0_46346380/article/details/104611167