如何将Java的DecimalFormat用于“智能”货币格式？ [英] How to use Java's DecimalFormat for "smart" currency formatting?

问题描述

 ＃1  -  100  - >我想用Java的DecimalFormat来格式化双精度。 $ 100 
＃2  -  100.5  - > $ 100.50 
＃3  -  100.41  - > $ 100.41 
  

到目前为止我所能想到的最好的是：

 新的DecimalFormat（'''0。##）; 
  

但这不适用于案例＃2，而是输出$ 100.5

编辑：

很多这些答案只考虑了案例＃2和＃3，并没有意识到他们的解决方案会导致＃1格式100为$ 100.00，而不是$ 100。

解决方案

是否必须使用 DecimalFormat ？

如果不是这样，看起来像下面这样：

 字符串currencyString = NumberFormat.getCurrencyInstance（）。format（currencyNumber）; 
 //处理无格式格式化整数美元金额的奇怪异常
 currencyString = currencyString.replaceAll（\\.00，）; 
  

I'd like to use Java's DecimalFormat to format doubles like so:

#1 - 100 -> $100
#2 - 100.5 -> $100.50
#3 - 100.41 -> $100.41

The best I can come up with so far is:

new DecimalFormat("'$'0.##");

But this doesn't work for case #2, and instead outputs "$100.5"

Edit:

A lot of these answers are only considering cases #2 and #3 and not realizing that their solution will cause #1 to format 100 as "$100.00" instead of just "$100".

解决方案

Does it have to use DecimalFormat?

If not, it looks like the following should work:

String currencyString = NumberFormat.getCurrencyInstance().format(currencyNumber);
//Handle the weird exception of formatting whole dollar amounts with no decimal
currencyString = currencyString.replaceAll("\\.00", "");

这篇关于如何将Java的DecimalFormat用于“智能”货币格式？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！