Position Class...- Simple question - urgent help needed

I am only having problems with Position parameters....what the hell does a Position refer
to? A number? Do you supply a number for Position parameter to find a node in a
doubly linked list? It seems that it goes by that way, but how the heck do you located it
with a Position parameter p (Postion p)? Doubly /singly linked lists have no reference this
with numbers....I am only confused when you have instances like:
public Object remove (Position p) {.....}
How do you instantenously locate the appropriate node in a Linked list via Position p
parameter?
Everything else I understand!!!! It's just that Positioning is bugging the hell out of me...Do
I supply number 3 for a third node in a linked list? or what?

i can not see a Object remove(Position p) in LinkedList , and the only Position class I can think of is in javax.swing.text - which is to do with marking positions in text documents. ?
can you explain your problem better ?

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