Access to Java jar from Delphi

Question

There's Java jar binary library with described classes/functions making some usefull things (nothing special just plain Java - no JNI). No sources available.

There's a task to call those functions directly from Delphi. How to do that?

P.S. I know nothing about Delphi, but I know a lot about Java.

Answer 1

No you can't the way to go is JNI.

A few resources:

• Pacifiers series on using JNI from Delphi
• my Talking Java from Delphi talk at the EKON 11 conference
• the Delphi JNI questions on SO

Unless you have too much time on your hands, in which you could decompress the JAR files (they are ZIP files), write your own Java VM in Delphi and go from there ;-)

Answer 2

Does the jar file contains a main class that can be called from the command line? If so problem solved Delphi can execute command line operations. If there is no main class you can create one that calls the original jar file.