Returned array from a method don't work properly over my Servlet

Question

Hi folks,
I show you my code and then explain ;).
        double particle_sys[] = new double[100*5];
     double particle[];
  try {
         for(i = 0; i < 10; i++)
          particle_sys[i*5] = 1;
          particle_sys[i*5 + 1] = 0;
          particle_sys[i*5 + 2] = 1;
          particle_sys[i*5 + 3] = 0;
          particle_sys[i*5 + 4] = 0;     
     class call = new class();
     particle = call.MyFailingMethod(particle_sys);Now the code for the class which owns the method I call
public class Jfjni
     static
             System.loadLibrary("nativelibrary");
     public native void .........
     public double[] MyFailingMethod(double particle_sys[])
           double particle[] = new double[100*5];
           .... A call to a the native library to recibe the new data of particle_sys ....
         for(int i = 0; i < 10; i++)
          particle[i*5] = particle_sys[i*5];
          particle[i*5 + 1] = particle_sys[i*5 + 1];
          particle[i*5 + 2] = particle_sys[i*5 + 2];
          particle[i*5 + 3] = particle_sys[i*5 + 3];
          particle[i*5 + 4] = particle_sys[i*5 + 4];     
          return particle; 
}A function in the native code changes the "particle_sys" array, but the returning value stills the same as the original passed to the function.
Because of this, I have tested returning the array, dont works. I have tested also returning a copy of the array in "particle", dont works.
Over standalone app and applet it runs correctly in all different ways, when I try it over a servlet the values of the array stand the same as before the method call.
Please suggestions!
Edited by: bifiado on Jan 15, 2008 10:27 AM
Edited by: bifiado on Jan 15, 2008 10:28 AM

Answer 1

I have partially solutioned this mistake but I have collateral ones. Looks like I forgot to put in web.xml the definition of the class I was calling from the principal servlet class. In other words, I have two classes, one is the extension of Httpservlet and the other (the class that make mistakes) is a class I call to do the JNI work.
Now, I added in web.xml the definition of the JNI class (before I forgot) and looks the mistakes with arrays works, but know the there's a new problem and get an IOexception on the applet that call the servlet. When I coment the JNI calls the exception dissapears and all works ok, but I am not getting any exception report on the tomcat ".out".
Please suggestions.