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作者您好,在阅读《BigDecimal 详解》一文当中,在介绍使用 RoundingMode的几种模式中,文中的样例注释当中使用了2.5 -2.5 1.6 -1.6这四个数作为的样例,但是对于最后一个四舍五入的方法没有区分度,均为大于5的数进位。所以我提议将2.5改为2.4,-2.5改为-2.4来进行区分,做了如下修改,并且使用java程序已验证正确性,希望可以合并