Loading a library in my own class...

Question

Hello,
I'm having some problems with loading my own library into a different class then the main, but I'm keep getting this error message:
run:
Exception in thread "main" java.lang.UnsatisfiedLinkError: cembedjava.CFunctions.nativePrint()V
        at cembedjava.CFunctions.nativePrint(Native Method)
        at cembedjava.Main.main(Main.java:17)
Java Result: 1The project is based around the tutorial for including some C code in a Java application. I'm working with an Ubuntu 8.10 distro, Netbeans IDE 6.1 and JDK 6 update 11. I'm new to Java programming, but I have experience with C, Delphi and Basic in different flavours.
The C code is working as it supposed to be (at least, I think, I had it running under the main class). The code implements a timer in C with an interval period of 1,5 seconds, which returns a message every time to the screen (or app). What's going wrong in the following code?
package cembedjava;
public class CFunctions
     public native void nativePrint(); 
     static {
       System.load("/home/richard/NetBeansProjects/HelloWorldNative/dist/libHelloWorldNative.so");
      // System.loadLibrary("libHelloWorldNative");
package cembedjava;
import java.lang.Thread;
import java.util.logging.Level;
import java.util.logging.Logger;
public class Main {
    public static void main(String[] args) {
        // TODO code application logic here
       CFunctions obj = new CFunctions();
       obj.nativePrint();
}Or do I need a new thread to keep my timer running?
Thanks

Answer 1

Thanks guys,
I got it working... I had a problem with the declaration of the function in my .h and .c file. In the .h file everything was okay, but I had the wrong classname in the .c file. For some reason this still compiled but gave me the exception during runtime.
Is there also a possibility not to have to put in the class name in the function declaration, right now the function are declared as this:
JNIEXPORT void JNICALL Java_cembedjava_CFunctions_nativePrint
      (JNIEnv *env, jobject obj)
With the CFunctions as class name en cembedjava as project name of the Java project. Is it possible to call my functions in a project and class that don't have the above stated names?