Java HotSpot Virtual Machine

Hi all. I am trying to simply wrap the facedetect C code to Java. I actually succeed in running the C code alone and build the dll file successfully. But when I am wrapping the C code to Java, The EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00009548, pid=2276, tid=2564 error just occurs. I debugged the program line by line, it suggested that cvLoadImage and cvHaarDetectObjects cannot be accepted by the JVM. Could anyone tell what's wrong with the original C code? How can I modify it? Is it because of the null pointer?

Here is my C code.

// OpenCV Sample Application: facedetect.c

// Include header files

        #include <jni.h>

        #include <stdio.h>

        #include "faceinter.h"

#include "cv.h"

#include "cxcore.h"
#include "highgui.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include <float.h>
#include <limits.h>
#include <time.h>
#include <ctype.h>

// Main function, defines the entry point for the program.
JNIEXPORT void JNICALL Java_lireface_Main_test

            (JNIEnv *env, jobject obj)
{
    CvMemStorage* storage = 0;
    CvHaarClassifierCascade* cascade = 0;
    CvSeq* faces;
    
    // Structure for getting video from camera or avi
    CvCapture* capture = 0;
    const char* cascade_name ;
    // Input file name for avi or image file.
    //   const char* input_name;
    cascade_name =
            "e:/OpenCV/data/haarcascades/haarcascade_frontalface_alt.xml";
//        input_name = argc > 2 ? argv[2] : 0;
    // Load the HaarClassifierCascade
    cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
    
    // Check whether the cascade has loaded successfully. Else report and error and quit
 
    
    // Allocate the memory storage
    storage = cvCreateMemStorage(0);
    char* a="e:/lena.jpg";
    
    // Create a new named window with title: result
    cvNamedWindow( "result", 1 );
    
    // Assume the image to be lena.jpg, or the input_name specified
    const char* filename =  a;
    
    // Load the image from that filename
    IplImage* image = cvLoadImage(filename, 1);
 
//    IplImage* image1 = cvCreateImage( cvSize(image->width, image->height), 8, 3 );
//    image1->imageData=image->imageData;
    
    // If Image is loaded succesfully, then:
     if( image ) {
        int scale = 1;
        CvRect rect;
        
        // Create a new image based on the input image
//    IplImage* temp = cvCreateImage( cvSize(image->width/scale,image->height/scale), 8, 3 );
        
        // Create two points to represent the face locations
        CvPoint pt1, pt2;
        int i;
        
        // Clear the memory storage which was used before
        cvClearMemStorage( storage );
        
        // Find whether the cascade is loaded, to find the faces. If yes, then:
            if( cascade ) {
 
            // There can be more than one face in an image. So create a growable sequence of faces.
            // Detect the objects and store them in the sequence
            faces = cvHaarDetectObjects( image, cascade, storage,
                    1.1, 2, CV_HAAR_DO_CANNY_PRUNING,
                    cvSize(40, 40) );
 
 
            // Loop the number of faces found.
            for( i = 0; i < (faces ? faces->total : 0); i++ ) {
                // Create a new rectangle for drawing the face
                CvRect* r = (CvRect*)cvGetSeqElem( faces, i );
 
                // Find the dimensions of the face,and scale it if necessary
                pt1.x = r->x*scale;
                pt2.x = (r->x+r->width)*scale;
                pt1.y = r->y*scale;
                pt2.y = (r->y+r->height)*scale;
 
                // Draw the rectangle in the input image
                cvRectangle( image, pt1, pt2, CV_RGB(255, 0, 0), 3, 8, 0 );
                rect = r[0];
 
 
            }
        } 
        
//            cvResetImageROI(img);
//            vRect cvGetImageROI(img);
        
//    if(!rect)
//        printf("alibaba \n");
        // Show the image in the window named "result"
//     cvShowImage( "result", image );
        
        
        // Release the temp image created.
        //   cvReleaseImage( &temp );
//        cvSaveImage("e:/NetBeansProjects/Lire_2901/alibaba.jpg", image);
//        cvSetImageROI(image1, rect);
//        cvSaveImage("e:/NetBeansProjects/Lire_2901/alimama.jpg", image1);
//        IplImage* temp = cvCreateImage( cvSize(image->width/scale, image->height/scale), image->depth, image->nChannels );
         cvShowImage("result", image);
        // Wait for user input
        cvWaitKey(0);
        
        // Release the image memory
         cvReleaseImage( &image );
         cvDestroyWindow("result");


//        cvReleaseImage( &temp );
//             cvSetImageROI(image1, rect);
     }
    int x=faces->total;
    if(x!=0){
        return 1;
    }else{
        return 0;
    } 
    
}

And the Java code is also listed here:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package lireface;

import java.awt.image.BufferedImage;
import java.net.URL;
import javax.imageio.ImageIO;
import java.io.IOException;
import java.awt.image.WritableRaster;

public class Main {
        static{
    System.load("e:\\NetBeansProjects\\face\\dist\\face.dll");
    } 

 
    public Main() {

    }

    public static void main(String[] args) throws IOException {
        new Main().test();
    }
    public static native void test();
}

I am looking forward to your help. Thanks.