JPX - Java Prolog eXtension

JPX is free software, licensed under the LGPL.

Features

JPX is a general purpose interface between the Java virtual machine and various Prolog implementations (currently only SWI-Prolog).
JPX is portable and works on Windows and various Unices.
JPX provides the means to use different Prolog backends without changing Java application code. Currently there is only support for SWI-Prolog, but hopefully there will be support for other engines such as a pure Java engine and SICStus Prolog.
JPX is a high level interface to Prolog; a Java class hierarchy comprising interfaces that models the basic concepts of Prolog such as terms and atoms.
A more high level interface is included for easily integrating JPX in complex graphical multi-threaded applications.
JPX provides only for using Prolog engines in the same process as the JVM.