how to link .net dll to java

[bharani rao]

hi,

i was want to link the .net dll created by a .net programer with java program.
i want to know the changes to be made in the java program to link that .net dll.

just as i'm using JNI to link various other programs using the native method created,

JNIEXPORT jint JNICALL Java_Arith_Add
  (JNIEnv *env, jobject obj, jint a, jint b)

like we use the above native method in c++ or any other program, i want the coding for the java program for the following file

// This is the main DLL file.

#include "stdafx.h"

#include "CPPTestArith.h"

using namespace System;

public class Arith
{
public : 
	int Add(int a, int b)
	{
		return (a + b);
	}

	int Sub(int a, int b)
	{
		return (a - b);
	}

	int Mul(int a, int b)
	{
		return (a * b);
	}
	int Div(int a, int b)
	{
		return (a / b);
	}

	int Mod(int a, int b)
	{
		return ( a % b);
	}
};

this is the header file

// CPPTestArith.h

#pragma once

using namespace System;

namespace CPPTestArith {

	public ref class Class1
	{
		// TODO: Add your methods for this class here.
	
			 
	};
}

so i need to know what should be my java file be like???

Thanks in advance

[Ulf Dittmer]

JNI does not work directly with .Net. You'll need to create a C++ wrapper around the .Net library; then you can use JNI to interact with it.

[bharani rao]

hi,

how to create a c++ wrapper.


Thank you

[Rob Spoor]

http://faq.javaranch.com/java/ShowSomeEffort
http://faq.javaranch.com/java/SearchFirst

If you use Google, the first link is http://www.jnbridge.com/jnbpro.htm?gclid=CMKNzqfv5pkCFYFA3god8G5-RQ. That is a commercial product though.

[bharani rao]

sorry and thank you, rob

[bharani rao]

hi,

kindly tell how to write a wrapper class..
i searched this site but dint get .

the info is provided above...

i will run java program and the java should call .net dll

kindly help.


Thanks in advance.