Re: How to find a character which can’t be stored in a MySQL “utf8” column in Java

[Filipe Silva]

It seems that you are on the right track. Personally, I would change this piece of code a little bit:

Set<String> findProblematicStrings(String input) {
return input.codePoints() // get Unicode code points
.filter(Character::isSupplementaryCodePoint) // filter BMP characters
.mapToObj(Character::toChars) // convert code points into char[]
.map(String::new) // convert char[] into Strings
.collect(Collectors.toSet());
}

But it does exactly the same as yours.