How to identified given string is double byte characterset using java?

Question

I want to Identify given string is double byte character set or not, using java?

Thanks

Answer 1

A String does not have a character set property, in fact, it is always UTF-16 (16 bit used for each char).

Answer 2

If you wanted to try to discover the likely charset of some input data (eg in a file or stream), then the ICU4J CharsetDetector could be used.

But by the time the data is in a String in your code, it is too late.

Answer 3

Your string has multibyte characters if String.codePointCount(int beginIndex, int endIndex) for the whole text range will give not zero result.