JNI-Test

//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;
}