如何在Java中设置千位分隔符? [英] How to set thousands separator in Java?

问题描述

如何在Java中设置千位分隔符?
我有一个 BigDecimal 的字符串表示，我想用千位分隔符格式化并作为字符串返回.

How to set thousands separator in Java?
I have String representation of a BigDecimal that I want to format with a thousands separator and return as String.

推荐答案

这应该有效(未经测试，基于 JavaDoc):

This should work (untested, based on JavaDoc):

DecimalFormat formatter = (DecimalFormat) NumberFormat.getInstance(Locale.US);
DecimalFormatSymbols symbols = formatter.getDecimalFormatSymbols();

symbols.setGroupingSeparator(' ');
formatter.setDecimalFormatSymbols(symbols);
System.out.println(formatter.format(bd.longValue()));

根据 JavaDoc，对于大多数语言环境，第一行中的强制转换应该是保存的.

According to the JavaDoc, the cast in the first line should be save for most locales.

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