//testdll.h
/* DO NOT EDIT THIS FILE - it is machine generated */

#include <jni.h>

/* Header for class testdll */

#ifndef _Included_testdll

#define _Included_testdll

#ifdef __cplusplus

extern "C" {

#endif

/*

* Class:       testdll

* Method:      get

* Signature: ()I

*/

JNIEXPORT jint JNICALL Java_testdll_get(JNIEnv *, jclass);

/*

* Class:       testdll

* Method:      set

* Signature: (I)V

*/

JNIEXPORT void JNICALL Java_testdll_set(JNIEnv *, jclass, jint);

#ifdef __cplusplus

}

#endif

#endif

//testdll.java
public class testdll

{

    static

    {

        System.loadLibrary("testdll");

    }

    public native static int get();

    public native static void set(int i);

    public static void main(String[] args)

	{

		testdll test = new testdll();

		test.set(10);

		System.out.println(test.get());

    }

} gcc -Wl,--add-stdcall-alias -I "C:\Program Files\Java\jdk1.6.0_39\include" -I "C:\Program Files\Java\jdk1.6.0_39\include\win32" -shared -o testdll.dll testdll.cpp

//testdll.cpp
#include "testdll.h"

int i = 0;

JNIEXPORT jint JNICALL Java_testdll_get(JNIEnv *, jclass)

{

    return i;

}

JNIEXPORT void JNICALL Java_testdll_set(JNIEnv *, jclass, jint j)

{

    i = j;

}