primaryTag
String primaryTag
AcceptableLanguageTagprotected LanguageTag(String header) LanguageTag(String primaryTag,
String subTags) LanguageTag(HttpHeaderReader reader) booleanfinal Localefinal Stringfinal Stringfinal StringgetTag()inthashCode()final booleanisCompatible(Locale tag) private booleanprotected final voidtoString()static LanguageTagParseExceptionParseExceptionIllegalArgumentExceptionParseExceptiontag - accept-language header value.true if the given value is valid language tag, false instead.