带格式的 Scala 字符串插值,如何更改语言环境? [英] Scala String interpolation with Format, how to change locale?
问题描述
在瑞典进行格式字符串插值时,在使用十进制数字创建字符串时,我得到的是逗号而不是点:
When doing format string interpolation in Sweden I get a comma instead of a dot when creating strings with decimal numbers:
scala> val a = 5.010
a: Double = 5.01
scala> val a = 5.0101
a: Double = 5.0101
scala> f"$a%.2f"
res0: String = 5,01
我的问题是,如何设置格式才能获得结果 5.01
?我希望能够仅为该字符串设置语言环境,即我不会更改整个环境的语言环境.
My question is, how do I set the format so that I get the result 5.01
? I would like to be able to set the locale only for that String, i.e. so that I don't change the locale for the whole environment.
干杯,
约翰
推荐答案
使用相同的 Java 库编号格式支持 可访问来自 StringOps
丰富的字符串类,您可以为该输出指定另一个语言环境:
Using the same Java library number formatting support accessible
from StringOps
enriched String class, you could specify another locale just for that output:
"%.2f".formatLocal(java.util.Locale.US, a)
(如如何将 Int 转换为给定长度且前导零对齐的字符串中所述?")
Scala 的方法是使用 string f interpolator (Scala 2.10+),正如在 OP 的问题中一样,但它使用当前语言环境",没有提供一种简单的方法来将该语言环境设置为不同的语言环境,仅用于一次调用.
The Scala way would be to use the string f interpolator (Scala 2.10+), as in the OP's question, but it is using the "current locale", without offering an easy way to set that locale to a different one just for one call.
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