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.Net dll from Java

Posted on 2010-09-23
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Last Modified: 2013-12-14
Hi,

I found numerous links about how C++ / Win32 dll s can be called from Java. Some useful links are given below.

http://sourceforge.net/projects/jawinproject/
http://www.experts-exchange.com/Programming/Languages/Java/New_to_Java/Q_23025774.html?sfQueryTermInfo=1+10+30+dll+java

etc. etc.

Now my question is can I use .Net dlls from java?  If it is possible then how it is possible? I repeat, I am not asking about COM dll, but asking about .Net dlls. Which may be heavily dependent on Framework.

Is it possible? I have not any fair idea about CORBA / JNI. Is this possible in those?
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Question by:Amitava_Mukherjee
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by:ksivananth
ID: 33751425
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ID: 33751469
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Author Comment

by:Amitava_Mukherjee
ID: 33752445
Yes, those r nice links which is telling that .Net dlls can be used from Java by JNI. Thanx for that. I really appreciate for those links.

But is there any sample code which demonstrates how to use C# 2008 dll from Java? I am not finding any links, all those are available which are demonstration of how to call C/C++ dlls from java. Please help
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by:gordon_vt02
gordon_vt02 earned 250 total points
ID: 33754489
The same principles should apply to the C# DLL as the C/C++ DLLs.  It is still a native interface.  As long as you are running on a Windows platform and have your java.library.path set correctly you should be ok.
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Author Comment

by:Amitava_Mukherjee
ID: 33759098
is it? there is no diffrence between C/C++ dll and those dlls generated in C# by "Class Library" type project selection? If I add following two lines in that C# dll

using system.windows.forms;

public void SayHello()
{
  MessageBox.Show("Hello", "Test", MessageBoxButton.OK, MessageBoxIcon.Information);
}

compile that in dll, and try to call it from Java, should it work?

Thanx
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Author Comment

by:Amitava_Mukherjee
ID: 33763015
OK, searching in net I have found a usefull (for me atleast) link at the following:

http://www.codeproject.com/KB/java/DebugJavaJNIApplication.aspx

Now as I proceed believing C# dll will work with JNI same as the C++ do, I have stuck out in the following codes of the above link !

#include "NativeAdd.h"

jdouble JNICALL Java_nativegui_NativeAdd_add
  (JNIEnv *env, jclass cls, jdouble n1, jdouble n2)
{
    return n1 + n2;
}

No place to write those lines in C# !! Please help, how this can be done in C#?

Thanx
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Author Closing Comment

by:Amitava_Mukherjee
ID: 33767129
THanx
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