C calling java package fails....

Question

Hello;
I created a C program to call a native java program. I have the program in a directory named world. I works great,but when I change the program and create a package and try to execute the FindClass to the package version I can not find it. Since I am new to Java, I need some guidance on this topic.
set CLASSPATH=c:\world
Here is a sample of my code:
================================
/* Load the Java VM DLL */
memset (&vm_args, 0, sizeof(vm_args));
vm_args.version=JNI_VERSION_1_2;
vm_args.options = options;
vm_args.nOptions = 1;
options[0].optionString = "-Djava.class.path=.";
vm_args.ignoreUnrecognized = TRUE;
res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
if (res < 0) {
fprintf(stderr, "Can't create Java VM\n");
          return 0;
cls = env->FindClass("world.HelloWorld");
====================================
I do not get a return address.

Answer 1

From the spec:
FindClass
jclass FindClass(JNIEnv *env, const char *name);
This function loads a locally-defined class. It searches the directories and zip files specified by the CLASSPATH environment variable for the class with the specified name.
PARAMETERS:
env: the JNI interface pointer.
name: a fully-qualified class name (that is, a package name, delimited by �/�, followed by the class name). If the name begins with �[� (the array signature character), it returns an array class.
RETURNS:
Returns a class object from a fully-qualified name, or NULL if the class cannot be found.
THROWS:
ClassFormatError: if the class data does not specify a valid class.
ClassCircularityError: if a class or interface would be its own superclass or superinterface.
NoClassDefFoundError: if no definition for a requested class or interface can be found.
OutOfMemoryError: if the system runs out of memory. Therefore leave the slash there, it has nothing to do with Windows file separators.
It's probably related with the classpath.
Can you post here the HelloWorld.java contents and all the relevant directory contents?
And in which directory you are excatly when you execute the exe?