Oh. No, that's not what I need.
*tries to be clearer*
When using vertex arrays like normal, that would probably work, but enabling ARB_vertex_buffer_object changes the behavior of the vertex array methods.
Instead of passing a pointer, you pass an offset.
So usually, you'd want to pass 0 to start from the beginning of the buffer.
That offset is used to offset the data of the vertex buffer, which resides on the video card memory.
(not to be confused with a java.nio.Buffer)
See the example way down at the bottom of the specification of ARB_vertex_buffer_object to see what I'm talking about.