Getting the id of an instance of a java object

hi,
i hope this is a real simple one... i need to get the object id of an object to compare it manually with an other object.
what for : i need to be able to compare the dump of a tree structure built up with javax.swing.text.AbstractDocument.AbstractElement at two different moments in time.
in eclipse, when debugging and i inspect one of the Elements, the eclipse shows me an id, how do i get that one in the code?
thanx for your help
dominik

you could use the Object's hashCode function to return something to you that could be used as an ID for hte object - but I don't know what eclipse uses.
good luck
Lee

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