JNI : cannot create JVM

Question

Hello everybody, sorry to bother all of you.
I got problem with the JNI.
I'm creating a Windows service that invoking a Java-based server via JNI.
I'm copying the source from the JNI tutorial (from sun), and the problem is:
res = JNI_CreateJavaVM(&jvm, (void **)&env, &vm_args);
res will result < 0, means it failed/cannot create Java VM.
I read on JNI tutorial that said the problem is because it cannot locate the JVM, or in other words, it cannot found the java library.
I'm using JDK 1.4.1_01 now, and Microsoft Visual C++.
I'm installing the JDK under "C:\Java\J2SE"
and I'm compile the c program inside "C:\Program Files\Microsoft Visual Studio\VC98\Bin", and I'm also copied the JVM.DLL into this directory, since it's needed when i'm running the exe file.
I already set the vm_args.version into JNI_VERSION_1_4 (0x00010004)
Does anybody know the workaround about this problem?
what directory should I put into vm_args.classpath? is it ".;C:\Java\J2SE\lib" ?
Thanks anyway.
Regards,
Loekito

Answer 1

Here's some stuff I can tell you.
1. dont copy the JVM.dll anywhere. Use the registry to find out where it is installed and then load it dynamically.
2. look at the laucnher directory in the src.zip file in the j2sdk. there are some examples in there you should find handy.