The *.java files in this directory are the source files from which the 
corresponding nsHtml5*.cpp and nsHtml5*.h files were generated in
../src/.

You can obtain the full Java version of the parser and the translator
program from
svn co http://svn.versiondude.net/whattf/htmlparser/trunk/ htmlparser

See run-cpp-translate.sh at the top level of the SVN checkout.