how to downcast a jobjectArray to an array of my own classes???

[Marco Feuerstein]

Hi folks,
sorry, if this question may be a bit banal to you, but I'm having 
following problem:
I'm instantiating a jobjectArray myArray like this:

jobjectArray myArray;

Later on I'm assigning an array of Nodes (where Node is my own Java 
class) doing an upcast:

myArray = (jobjectArray) someClass->getNodes(blah);

Well, now I have an array of objects. My problem is that I need an array 
of Nodes for my next operation.
How can I downcast myArray to an array of Nodes?

Thank you so much!
Regards
Marco