Unable to create JVM

Question

Hi !
In my project, i need to call a java method from C code using JNI.
Here is the Java code:
public class Prog{
     public static void main(String args[]){
          System.out.println("Hello Java Native"+args[0]);
}And C code:
#include <jni.h>
void destroy (JNIEnv *env,JavaVM *jvm,char *str){.....}
main(){
     JNIEnv *env;
     JavaVM *jvm;
     JavaVMInitArgs vm_args;
     JavaVMOption options[3];
     options[0].optionString = "-Djava.compiler=NONE";
     options[1].optionString = "-Djava.class.path=.";
     options[2].optionString = "-verbose:jni";
     memset (&vm_args,0,sizeof(vm_args));
                     vm_args.version = JNI_VERSION_1_4;
     vm_args.nOptions = 3;
                     vm_args.ignoreUnrecognized = JNI_TRUE;
     vm_args.options = options;
     /* Create Java VM */
     res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
     if(res<0){
          fprintf(stderr,"Can't create Java VM\n");
          printf("%d",res);
          exit(1);
     (*env) -> CallStaticVoidMethod(env,cls,mid,args);
     (*jvm) -> DestroyJavaVM(jvm);
}I think the code is alright.But when i run it , it tells me "Can't create Java VM".I guess there are some problems with Path or CLASSPATH? And i copy a (jre\bin\client)jvm.dll. Is there something wrong?
Thank you for your help.�H

Answer 1

Do NOT copy jvm.dll into your executable folder.
instead simply set the Path environment variable appropriately before the execution
set Path=C:\Program Files\Java\jre1.5.0_07\bin\client;%Path%
yourExecutable.exeRegards