How to check if Cyrillic is present in a string?

Question

Java

How to check for Cyrillic?
For example, if the line contains Cyrillic, then it will display an error, but if everything is Latin, then there will be no error?
How to do a similar check in java?

Answer 1

String s = "Тест";
boolean cyrillic = s.chars()
                    .mapToObj(UnicodeBlock::of)
                    .anyMatch(b -> b.equals(UnicodeBlock.CYRILLIC));

Answer 2

Use regular expression string validation.
In your case, you need to look not for forbidden characters, but on the contrary, check that the string contains only allowed characters.
https://ru.stackoverflow.com/questions/569779/%D0%...