To do this kind of things you need to cast your object you can cast the Object from the specific Class if you know it or to an interface implemented by all the Object in your Vector;
So for me
test this
Vector v = new Vector();
int z=0;
AnObjectWithWeirdMethod myOject = new AnObjectWithWeirdMethod();
v.add(myObject);
z = ((AnObjectWithWeirdMethod)v.elementAt(0)).weirdMethod();
hope it helps
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Benjamin l�onard
evisor