JNI_CreateJavaVM fails on Windows - Very urgent

Question

Folks,
I am very much new to the JNI on Windows 2000. For the last two days, I am trying to load JVM into my application. But, could not succeed. Even the samples I got across the net failed. The problem is "JNI_CreateJavaVM" returns -1.
Using Microsoft Visual Studio 6.0, and VC++, I created a project with default settings and used the following sample code and it fails left and right. Please, let me know if I am doing something wrong.
Sample
JNIEnv *env = NULL;
JavaVMInitArgs vm_args;     
JavaVMOption options[4];
char a1,a2;
int nbOptions;
jint res = 0;
char classpath,librarypath;
classpath = malloc(1024,sizeof(char));
librarypath= malloc(1024,sizeof(char));
strcpy(classpath, "-Djava.class.path=e:\\jdk1.2.2;e:\\jdk1.2.2\\jre\\lib\\i18n.jar");
strcpy(librarypath, "-Djava.library.path=.;e:\\jdk1.2.2\\jre\\bin;e:\\jdk1.2.2\\jre\\bin\\classic");
options[0].optionString = classpath;
options[1].optionString = librarypath;
options[2].optionString = "-Djava.compiler=NONE";
options[3].optionString = "-verbose:jni";
vm_args.version = JNI_VERSION_1_2;
vm_args.options = options;
vm_args.nOptions = 4;
vm_args.ignoreUnrecognized = JNI_TRUE;
res = JNI_CreateJavaVM(&jvm,(void **)&env,&vm_args);
I tried with other samples also. But, the result is same. JNI_CreateJavaVM returns -1.
If possible, please respond to [email protected] also
Thanks,
Lokesh

Answer 1

strcpy(librarypath, "-Djava.library.path=.;e:\\jdk1.2.2\\jre\\bin;e:\\jdk1.2.2\\jre\\bin\\classic");
options[1].optionString = librarypath;This doesn't do what the author probably expected. This specifies the path(s) for Java to load native libraries from -- this is different from the path where you actually want to load the JVM from. That path is up to the system and where things happen to be, unless you specify it explicitly in your call to load jvm.dll in the case of Windows, and I assume you use the system call LoadLibrary() on Windows in order to do this. If you do not (and you don't use some other Win API call for this purpose) then you are depending entirely on your system's environment variables in order to create the JVM instance.
So, it is not something that Sun has to do anything about.