dev-cpp-users

[Dev-C++] JNI help

[Raj K. <raj...@ya...>]

Hi,
 
I am trying to write a simple C program to see how JNI works.
 
This is my code:
======================================

#include <jni.h>
#include <stdio.h>
# include "HelloWorld.h"
JNIEXPORT void JNICALL
Java_HelloWorld_print(JNIEnv *env, jobject obj)
{
    printf("Hello World!\n");
    return;
}
    
======================================
 
When I try to compile the code I get following error:
 
[Linker error] undefined reference to `WinMain@16'

I am working on Windows 2000 server.  Could some one please point me in the right direction.
 
Thanks,
Raj
 


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Re: [Dev-C++] JNI help

[Mark L. <mli...@ip...>]

On Wed, 14 May 2003 07:34:25 -0700 (PDT)
Raj Kolluri <raj...@ya...> wrote:

Now I know nothing about JNI but if this is a C program, where is your

int main(int argc, char *argv[])

or something equivalent?

> This is my code:
> ======================================
> 
> #include <jni.h>
> #include <stdio.h>
> # include "HelloWorld.h"
> JNIEXPORT void JNICALL
> Java_HelloWorld_print(JNIEnv *env, jobject obj)
> 
>     printf("Hello World!\n");
>     return;
> 
>     
> ======================================
> 
> When I try to compile the code I get following error:
> 
> [Linker error] undefined reference to `WinMain@16'

Re: [Dev-C++] JNI help

[Chris H. <chr...@ho...>]

You need to compile your code as a libary (ie: DLL in windows), compiler =
is looking for the main, thats why the errors occuring.

There doesn't appear to be anything wrong with your code. Theres a =
tutorial from sun that shows how to create programs using JNI here:
http://java.sun.com/docs/books/tutorial/native1.1/index.html

chris.

  ----- Original Message -----=20
  From: Raj Kolluri=20
  To: dev...@li...=20
  Sent: Thursday, May 15, 2003 12:34 AM
  Subject: [Dev-C++] JNI help


  Hi,

  I am trying to write a simple C program to see how JNI works.

  This is my code:
  =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
  #include <jni.h>
  #include <stdio.h>
  # include "HelloWorld.h"
  JNIEXPORT void JNICALL
  Java_HelloWorld_print(JNIEnv *env, jobject obj)
  {
      printf("Hello World!\n");
      return;
  }
     =20
  =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

  When I try to compile the code I get following error:

  [Linker error] undefined reference to `WinMain@16'

  I am working on Windows 2000 server.  Could some one please point me =
in the right direction.

  Thanks,
  Raj



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