System.identityHashCode() and compacting garbage collectors

Posted by FredOverflow on Stack Overflow See other posts from Stack Overflow or by FredOverflow
Published on 2010-05-10T07:07:54Z Indexed on 2010/05/10 7:14 UTC
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java

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garbage-collection

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hashcode

I was just wondering how System.identityHashCode() is able to always yield the same result for a given object, even if the garbage collector moves it around in memory. Does every object have an additional invisible field storing its identity, independent from its current address?

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