gedcom4j is a Java library for parsing and writing GEDCOM 5.5 and 5.5.1 files. It is not an application; it is a library intended for use by developers in their own applications.
Full information, including downloadable binaries, examples, a working demo, documentation, and other help is available at http://gedcom4j.org.
Having trouble? Log an issue at https://github.com/frizbog/gedcom4j/issues