Qt Jambi is a port of this tool-kit for Java, but following the release of Qt Jambi 4.5 next month, Qt Software will stop developing the Jambi portion of Qt. The stated reason for this decision is to focus more resources on the Qt cross platform application and UI framework. Qt Jambi developers though won't be entirely let down, but Qt Software will be hosting a community implementation of this project, which will hopefully live on.
Qt Software has today made available a technical preview of Qt Jambi 4.5. Both announcements were made in this press release.