JNI : Having issue with accessing C# dll

Question

Hi Everyone,
Could you please tell me how to access C# dll using JNI.
My code looks like below:
public class JNISample {
     public native void Message();
static{
          System.load("D:/*******/JNISample/dll/SampleDLL.dll");
          System.out.println("library loaded");
     public static void main(String args[])
          System.out.println("JNI sample example");
          new JNISample().Message();
I created header file using command below
javah -jni -classpath d:\*****\JNISample\src JNISampleI am getting below error:
java.lang.UnsatisfiedLinkError: no D:/Applet/JNISample/dll/SampleDLL.dll in java.library.path
     at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1709)
     at java.lang.Runtime.loadLibrary0(Runtime.java:823)
     at java.lang.System.loadLibrary(System.java:1030)
     at JNISample.<clinit>(JNISample.java:16)
Exception in thread "main"
Could anyone please tell some suggestions?
Thanks,
Kavita
Edited by: java_pgrm on Dec 2, 2009 9:36 PM
Edited by: java_pgrm on Dec 2, 2009 9:38 PM

Answer 1

java_pgrm wrote:
I am really sorry to ask u such question.. What is .c file? Actually I am using c# dll. Java JNI requires a specific linkage which in general means that the JNI shared library must be written in C or C++.
What happens in that shared library is up to you. However note that fairly recent posts on this forum indicate that there are some complications about correctly using a JNI shared library with C#. Somewhere there is a thread that discusses it.
You might also consider just creating a separate executable with a comm interface (sockets, files, stdio) rather than using JNI. There are advantages to that including that it can't take down the VM (bad coding on your part in JNI can) and it is much easier to test.