Java获取小数点后几位 

学习中遇见保留1小数点后位，选择有四种方法：方法：1、用format方法，语法“String.format("%.2f",数值)”；2、用DecimalFormat的format方法；3、用setScale方法进行四舍五入；4、用setMaximumFractionDigits方法。
方法一：String的format方法
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103162408879-655089834.png)
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163239731-963062263.png)
方法二：DecimalFormat的format方法
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163316186-2063136391.png)
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163324958-2107658823.png)
方法三：BigDecimal的setScale方法
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163335596-788806062.png)
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163342585-1342603831.png)
方法四：NumberFormat的setMaximumFractionDigits方法
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163352704-483644913.png)
![](https://img2022.cnblogs.com/blog/2914114/202211/2914114-20221103163359482-2027013002.png)
posted @ 2022-11-03 16:34  wmr123  阅读(198)  评论(0)  编辑  收藏  举报