I have a project written in Java (>1.5).
Is it possible to write parts of the project with C#?
For instance the GUI and calling the methods and instanciate the classes written in java?
If yes, how?
views:
2176answers:
6
+6
A:
Not without something like ikvm - or using web services etc to communicate between the two sides. Basically it's likely to be much more work than either rewriting your existing project code in C# or writing the GUI in Java.
Jon Skeet
2008-10-05 09:00:58
Can you explain why it's not possible with dll approach ? Rewriting is an option for small project rewriting 100.000 line for example might be costly ...
Ilya
2008-10-05 12:56:54
You'd need to be running both the CLR and the JVM - and the two VMs don't know about each other's objects.
Jon Skeet
2008-10-05 14:08:29
You mean, Ilya's answer is not working?
Burkhard
2008-10-05 17:09:47
Ilya's answer only applies if you're using the Excelsior JET JRE, and only up to v3.7.
Jon Skeet
2008-10-06 09:42:43
I edited my answer to avoid confusion.
Ilya
2008-10-15 07:44:21
+4
A:
There is something called Java Language Conversion Assistant for .NET. You can convert your Java classes to c# and start coding.
There is also something called JNBridge (not free).
Midhat
2008-10-05 09:02:24
+3
A:
It seems like my solution is very limited. and apply only to specific version of java.
I probably will stay with old good C :) Can't imagine how to work without shared libraries :)
This document explain how to create a dll from java and use it in C code. I'm not C# or java expert but i'm sure that you can load external dll's in C# as well. So not a complete solution but good starting point, IMHO. Generally dll it's a perfect way to mixing languages.
Ilya
2008-10-05 09:08:30
Note that that document only applies to a particular JRE, and only up to a particular (fairly old - 2005) version.
Jon Skeet
2008-10-06 09:43:44
Like i mention i'm not a java expert. Does it mean that that creating dll in java is not trivial ? How one share libraries in java ?
Ilya
2008-10-15 07:38:40
Ilya: Java libraries are shared in JAR-files. They are essentially compressed archives (zip I believe) that contain the Java bytecode compiled files and other resources.
Spoike
2008-10-15 07:48:25
+1
A:
In simple way you can pack your java classes to jar file then In C# use Process class for execute and map IO stream
Fuangwith S.
2008-10-05 15:43:51
A:
I did some research on this a few years ago (2005 I believe) and I liked JNBridgePro as the best third party product to do this. Check it out here http://www.jnbridge.com/
Good luck!
+3
A:
I am author of jni4net, open source intraprocess 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.
Pavel Savara
2009-10-31 19:36:29