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Inconsistent display of HashMap-keys [message #10034]

Tue, 14 April 2009 07:43

Stefan Lotties
Messages: 3
Registered: July 2009

Junior Member

Hi,

I just opened two heap dumps and noticed a HashMap having String's as keys
and wondered why the keys were so big.

The display looks like this:

HashMap
- table java.util.HashMap$Entry[xxx]
-- <class> java.util.HashMap$Entry[]
-- [yyy] java.util.HashMap$Entry @ 0x...
--- <class> java.util.HashMap$Entry
--- key java.lang.String @ 0x... some_string (retained heap: 24)
---- <class> java.lang.String
---- value char[zzz] @ 0x... some_other_string (retained heap: 30,336)

I'm a little bit confused why the key-Member has actually a very low
retained heap size and displays a different string than the char[] inside
the String which has an even bigger retained heap size. This can be seen
on every HashMap-Entry I checked from this map (it contains actually
>100.000 elements ;). Is there anything I'm doing wrong in my very simple
assumption that the key should be the same as the char[] inside it?

Regards,
Stefan

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[Message index]

		Inconsistent display of HashMap-keys By: Stefan Lotties on Tue, 14 April 2009 07:43
		Re: Inconsistent display of HashMap-keys By: Erwin Margewitsch on Tue, 14 April 2009 09:54
		Re: Inconsistent display of HashMap-keys By: Stefan Lotties on Tue, 14 April 2009 10:52
		Re: Inconsistent display of HashMap-keys By: Stefan Lotties on Tue, 14 April 2009 12:02

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