c - How to use a dll file in java code using JNA? -

i have use dll file (of c code) in java code, searched allot , found jna suitable way it. therefore, trying write helloworld program using jna-4.1.0.jar. below c code:

//c hello world example #include <stdio.h>  void __declspec(dllexport) _stdcall hellofromc() {   printf("hello world c code! \n"); } 

and make dll c code using following commands on cmd:

gcc -c ctest.c gcc -shared -0 test.dll ctest.o 

running these commands gives me dll c code, place @ root of simple java project.

now here java class:

import com.sun.jna.native; import com.sun.jna.library;  public class helloworld {  public interface ctest extends library {     void hellofromc(); }   public static void main(string[] args) {         ctest instance = (ctest) native.loadlibrary("ctest", ctest.class);          instance.hellofromc();     } } 

now when run java program on eclipse, getting error:

exception in thread "main" java.lang.unsatisfiedlinkerror: %1 not valid win32 application. 

kindly me solve issue has taken of time!

gcc -c ctest.c gcc -shared -o test.dll ctest.o try     'o'  ^  not '0' 

it's finding dll doesn't it.