How do I detect unicode characters in a Java string?

Question

Suppose I have a string that contains Ü. How would I find all those unicode characters? Should I test for their code? How would I do that?

For example, given the str

Answer 1

You could go the other way round and ask if the character is an ascii character.

public static boolean isAscii(char ch) {
    return ch < 128;
}

You'd have to analyse the string char by char then of course.

(the method is from commons-lang CharUtils which contains loads of useful Character methods)