In JNI, you can use the RegisterNatives method to specify the native implementation of a java native method. This avoid the java code to do an explicit System.load() call.

The Java Activator is using this API a lot to avoid versioning problems between the Activator and the VM.

When running the Activator with the Symantec JIT, all native codes generate an UnsatisfiedLinkError unless an explicit System.load() call is made in the java code.