Call Web Service method through a Proxy

[Dimis]

Hi everybody,
I am using Java in Netbeans.
I have implemented a client for a WS from the WSDL file.
I have managed to call operations of the WS by coding:

TheService service = new TheService();
TheServiceSoap port = service.getTheServiceSoap();
port.invokeMethod(parameters...);

My problem is that I want to invoke WS operationg through a proxy and I do
not want to use

System.setProperty(... , ... )

as it sets the vm properties and I dont want that.

Any suggestions, guidance is appreciated..
Kind regards
Dimitris