How to call Java code from C# ?

Question

We've developed a Java application and would like to use this application from a C# client. The application has dependencies on Spring, Log4j, ...

What would be the most efficient mechanism - make DLL(s) from Java code, ... - to achieve this ?

Answer 1

IKVM!

It is really awesome. The only problem is that it DOES add ~30MB to the project. log4net and Spring .NET are available as well, but if living with existing code, go the ikvm route.

Answer 2

alternatively you could write a webservice/xmlrpc layer between the two.

I seem to remember that there is a tool calles grassshopper that will compile your .Net code into JVM bytecode.

I've also heard good things about IKVM

Answer 3

Here's a few links that might help:

http://www.devx.com/interop/Article/19945/1954
http://www.ezjcom.com/?gclid=CJflqrms9ZUCFRqH1QodPSb_hA

Mainsoft do a .NET -> JVM cross compiler, but you may not want to recompile the .NET app:

http://dev.mainsoft.com/Default.aspx?tabid=130

Answer 4

I am author of jni4net, open source interprocess bridge between JVM and CLR. It's build on top of JNI and PInvoke. No C/C++ code needed. I hope it will help you.