Java is a great programming language, but it is an imperative programming language and it is difficult to model declarative problems with it. Instead, Prolog is more suitable to handle problems where you need declarative programming features. In order to properly connect your Java program with a Prolog interpreter you need an interface. There are several such interfaces depending on the Prolog intepreter you want to use. In this page I will describe some of the interfaces that I found searching the web.

Ciao Prolog provides an interface for Java. You can find out more by checking their site at:

http://clip.dia.fi.upm.es/Software/Ciao/ciao_html/ciao_158.html#SEC662

JPL is a library using the SWI-Prolog foreign interface and the Java jni interface providing a bidirectional interface between Java and Prolog that can be used to embed Prolog in Java as well as for embedding Java in Prolog. In both setups it provides a reentrant bidirectional interface. Check it here:

http://www.swi-prolog.org/packages/jpl/

Jasper is a bi-directional interface between programs written in Java and programs written in Prolog. The Java-side of the interface constists of a Java package (

jasper

http://www.sics.se/sicstus/docs/3.7.1/html/sicstus_12.html

I found this interesting interface that can help you build powerful programs mixing Java and Prolog:

http://www.cs.ucy.ac.cy/compulog/dec98update/projects/interprolog.htm