How to determine if a String contains invalid encoded characters

Question

Usage scenario

We have implemented a webservice that our web frontend developers use (via a php api) internally to display product data. On the webs

Answer 1

You can use a CharsetDecoder configured to throw an exception if invalid chars are found:

 CharsetDecoder UTF8Decoder =
      Charset.forName("UTF8").newDecoder().onMalformedInput(CodingErrorAction.REPORT);

See CodingErrorAction.REPORT