Is it possible to have hidden data for each item in the list?

JComponents can obtain hidden data using setName() and getName(), right? What about JComboBox items? (I'm referring to the items in the JComboBox, NOT the JComboBox itself)

What if I have a JComboBox, and inside it I have a list of usernames (for example), now I want to have something like 'id' for each username in the list according to how they are ordered, what's the best way to do this?