java java或java库中是否有语言代码的常量？
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Are there constants for language codes in java or in a java library?
提问by Martin Schlagnitweit
Are there any constants for language codes like "en"or "de"in java or in a java library? (Or is using the strings OK?)
是否有像语言代码的任何常量"en"或"de"Java或在一个Java库？（或者使用字符串可以吗？）
I know that something like
我知道像
Locale.COUNTRY-NAME.getLanguage()
would work, but I am searching for something more streamlined like
会工作，但我正在寻找更精简的东西，比如
Locale.LANGUAGE-NAME
采纳答案by Itay Maman
I am afraid there aren't constants for all languages.
You do have several predefined Locales such as Locale.UKLocale.US, etc. Each locale has a language code which can be obtained via the getLanguage()method.
恐怕不是所有语言都有常数。您确实有几个预定义的区域设置，例如Locale.UKLocale.US等。每个区域设置都有一个语言代码，可以通过该getLanguage()方法获取。
To get all language code supported by the underlying JVM use getISOLanguages()
要获取底层 JVM 支持的所有语言代码，请使用 getISOLanguages()
for(String lang : Locale.getISOLanguages()) {
System.out.println(lang);
}
More details: http://download.oracle.com/javase/1.4.2/docs/api/java/util/Locale.html
更多详情：http: //download.oracle.com/javase/1.4.2/docs/api/java/util/Locale.html
回答by MaDa
The 2-letter language codes are defined by ISO 639-1 standard. The java.util.Localeclass does not contain them all, but only Locales supported by the VM (as per Locale.getAvailableLocales()).
2 个字母的语言代码由 ISO 639-1 标准定义。本java.util.Locale类不包含所有这些，但只有语言环境由VM支持（按照Locale.getAvailableLocales()）。
The easiest way to access all ISO 639-1 language codes in Java is to rely on the International Components for Unicodeproject (ICU4J) — an extensive, widely used and actively developed i18n library from IBM. You can get the list of all languages from the ULocale class: com.ibm.icu.util.ULocale.getISOLanguages().
在 Java 中访问所有 ISO 639-1 语言代码的最简单方法是依赖International Components for Unicode项目 (ICU4J)——IBM 提供的一个广泛、广泛使用和积极开发的 i18n 库。您可以从 ULocale 类中获取所有语言的列表：com.ibm.icu.util.ULocale.getISOLanguages()。
回答by Varun Achar
Yup.. Use Locale.COUNTRY-NAME
是的..使用 Locale.COUNTRY-NAME
