Help
Hello,
I am currently learning JNI and I have come across a problem. I need some advice on it.
My Java File : Addition.java
class Addition
{
public native void add(int a, int b);
static
{
System.loadLibrary("addition");
}
public static void main (String ax[])
{
try
{
int a = Integer.parseInt(ax[0]);
int b = Integer.parseInt(ax[1]);
System.out.println("Native Method called");
new Addition().add(a,b);
}
catch (Exception e)
{
System.out.println(e);
}
}
}
When I run the javac command on this file,it gets compiled.When I run the javah -jni command on it it creates the following header file
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class Addition */
#ifndef _Included_Addition
#define _Included_Addition
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class:Addition
* Method:add
* Signature: (II)V
*/
JNIEXPORT void JNICALL Java_Addition_add
(JNIEnv *, jobject, jint, jint);
#ifdef __cplusplus
}
#endif
#endif
My C method file : AdditionImpl.c
# include <jni.h>
# include <stdio.h>
# include "Addition.h"
JNIEXPORT void JNICALL Java_Addition_add (JNIEnv *env, jobject obj, jint a, jint b)
{
int x;
x = a+b;
printf(x);
}
The entire program gets compiled perfectly. I am using J2SDK1.3 and VC 6.0 software on Windows 2000 platform. However when I run the command
java Addition 2 3
it throws the following exception :
# An EXCEPTION_ACCESS_VIOLATION exception has been detected in native code outside the VM.
# Program counter=0x10001587
Can someone please point out my mistake.
