Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.java.programmer > #10114
| Path | csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail |
|---|---|
| From | markspace <-@.> |
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Size of an arraylist in bytes |
| Date | Sun, 20 Nov 2011 13:05:56 -0800 |
| Organization | A noiseless patient Spider |
| Lines | 17 |
| Message-ID | <jabq3m$soi$1@dont-email.me> (permalink) |
| References | <e9dcfb2d-dfef-4ae6-9d9f-979a8f08b962@t36g2000prt.googlegroups.com> |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset=ISO-8859-1; format=flowed |
| Content-Transfer-Encoding | 7bit |
| Injection-Date | Sun, 20 Nov 2011 21:05:58 +0000 (UTC) |
| Injection-Info | mx04.eternal-september.org; posting-host="XjIWM99mD7Ijfdu600oVPA"; logging-data="29458"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18IpR9VDqgAUVMB1Juz7yIFZ9xVeBbvwas=" |
| User-Agent | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 |
| In-Reply-To | <e9dcfb2d-dfef-4ae6-9d9f-979a8f08b962@t36g2000prt.googlegroups.com> |
| Cancel-Lock | sha1:/uv61JzoDP97ngKgD67HFLOg0/U= |
| Xref | x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:10114 |
Show key headers only | View raw
On 11/20/2011 1:01 PM, sara wrote: > Hi All, > > I create an Arraylist<Integer> tmp and add some integers to it. > Afterward, I measure the size of tmp in bytes (by converting tmp to > bytes array). Assume the result is byte[] C. However, when I update an > element of tmp, and measure size of tmp in bytes again, the result is > different than C! > Why this is the case? We'd have to see some code to give you a good answer, but basically you can't measure the memory size of Java objects. They change over time, in ways that C or C++ can't or doesn't, and there's not much to do that can rectify that.
Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Size of an arraylist in bytes sara <sarasara82@gmail.com> - 2011-11-20 13:01 -0800
Re: Size of an arraylist in bytes markspace <-@.> - 2011-11-20 13:05 -0800
Re: Size of an arraylist in bytes sara <sarasara82@gmail.com> - 2011-11-20 13:11 -0800
Re: Size of an arraylist in bytes Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-11-20 21:58 +0000
Re: Size of an arraylist in bytes markspace <-@.> - 2011-11-20 14:08 -0800
Re: Size of an arraylist in bytes Patricia Shanahan <pats@acm.org> - 2011-11-20 14:50 -0800
Re: Size of an arraylist in bytes Arne Vajhøj <arne@vajhoej.dk> - 2011-11-20 18:06 -0500
Re: Size of an arraylist in bytes Lew <lewbloch@gmail.com> - 2011-11-20 20:28 -0800
Re: Size of an arraylist in bytes Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-20 16:30 -0500
Re: Size of an arraylist in bytes sara <sarasara82@gmail.com> - 2011-11-20 13:35 -0800
Re: Size of an arraylist in bytes Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-20 17:19 -0500
Re: Size of an arraylist in bytes Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-11-20 16:58 -0500
Re: Size of an arraylist in bytes Patricia Shanahan <pats@acm.org> - 2011-11-20 14:04 -0800
Re: Size of an arraylist in bytes Arne Vajhøj <arne@vajhoej.dk> - 2011-11-20 17:18 -0500
Re: Size of an arraylist in bytes Patricia Shanahan <pats@acm.org> - 2011-11-20 14:48 -0800
Re: Size of an arraylist in bytes Arne Vajhøj <arne@vajhoej.dk> - 2011-11-25 22:12 -0500
Re: Size of an arraylist in bytes Lew <lewbloch@gmail.com> - 2011-11-20 20:44 -0800
Re: Size of an arraylist in bytes Arne Vajhøj <arne@vajhoej.dk> - 2011-11-25 22:16 -0500
Re: Size of an arraylist in bytes Lew <lewbloch@gmail.com> - 2011-11-25 20:15 -0800
Re: Size of an arraylist in bytes Roedy Green <see_website@mindprod.com.invalid> - 2011-11-20 22:25 -0800
Re: Size of an arraylist in bytes Arne Vajhøj <arne@vajhoej.dk> - 2011-11-25 22:11 -0500
csiph-web