[Jamvm-general] Error when using JNI

[ZNTU <Z0...@nt...>]

Hi,

Currently I've tried to do some programing with JNI but when I run java
programs there is and error as it cannot find native library... may I have
any suggestion that what should I do about it?

Here is what I have done so far.

1. create java source code and store in /home/user/jni

------
class HelloWorld {
     private native void print();
     public static void main(String[] args) {
         new HelloWorld().print();
     }
     static {
         System.loadLibrary("HelloWorld");
     }
 }
------


2. compile java
javac HelloWorld.java

3. create header file
javah -classpath . -d . -jni HelloWorld

------------------
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class HelloWorld */

#ifndef _Included_HelloWorld
#define _Included_HelloWorld
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     HelloWorld
 * Method:    print
 * Signature: ()V
 */
JNIEXPORT void JNICALL Java_HelloWorld_print
  (JNIEnv *, jobject);

#ifdef __cplusplus
}
#endif
#endif
----------------------



4. writing c source code for jni

-------
#include <jni.h>
#include <stdio.h>
#include "HelloWorld.h"
 
JNIEXPORT void JNICALL 
Java_HelloWorld_print(JNIEnv *env, jobject obj)
{
    printf("Hello World!\n");
    return;
}
--------


5. compile c programing and create .so

gcc -o libHelloWorld.so HelloWorld.c -shared -fpic -lcrypt
-I/home/user/home-platform/classpath/include



Therefore, in the folder /home/user/jni, there are  file

HelloWorld.c
HelloWorld.class
HelloWorld.h
HelloWorld.java
libHelloWorld.so

then I run "jamvm HelloWorld"

and the error appears

java.lang.UnsatisfiedLinkError: Native library `HelloWorld' not found (as
file `libHelloWorld.so') in gnu.classpath.boot.library.path and
java.library.path
   at java.lang.Runtime.loadLibrary(Runtime.java:763)
   at java.lang.System.loadLibrary(System.java:662)
   at HelloWorld.<clinit>(HelloWorld.java:7)



I try to copy libHelloWorld.so in to my boot library path which is

Boot Library Path: /home/user/home-platform/classpath/lib/classpath


May I have some suggestions or comments about how should i solve this
problem? or am i doing anything wrong in the steps above?

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