The java compiler might need a reminder to use UTF-8 using the option -encoding UTF-8.

Javadoc has 3 options for dealing with UTF-8 characters. Encoding for the source (i.e. reading UTF-8 encoded java files), docencoding for the output (i.e. the html encoding) and charset for the output (i.e. to tell the browser what character set to use). All of these options need to be set to UTF-8.

Running a Java program with UTF output might require to set the JVM to UTF as well. -Dfile.encoding=UTF-8 should do the trick.