How to validate russian letters?

Question

How can I validate the Russian language? If I start and use russian, I'll receive: java.util.regex.PatternSyntaxException: Illegal character range near index 4 ^[а-ЯА-Яa-zA-Z ]+$

private Pattern onlyLetter = Pattern.compile("^[а-ЯА-Яa-zA-Z ]+$", Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE) ;

https://stackoverflow.com/questions/1716609/how-to-match-cyrillic-characters-with-a-regular-expression — BackSlash, Jan 21 '19 at 11:40

score 1 · Accepted Answer · answered Jan 21 '19 at 11:44

You can use \p{IsAlphabetic} is regular expressions in Java, which is Unicode-aware and can check if the characters are alphabetic.

See https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html, «Classes for Unicode scripts, blocks, categories and binary properties»

How to validate russian letters?

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