Hi,
I have just realised that if you add a NULL value to a .parameter() in java, then the parameter will simply be removed.
Ex.
IRI temp = null;
connection.ask("ASK {?temp a rdfs:Class}").parameter("temp", temp);
Would be great if parameter threw a NullPointerException to be honest. Would make it easier to hunt down bugs.
Cheers,
Håvard