[ajug-members] asked a different way

[521]

jeff, like this...  attached, i've never used arraylist; neat, not sure there is much memory change

barclay

On Fri, 12 Sep 2008 08:45:22 -0400, Wilson, Jeff wrote
> If I'm reading your program correctly, you aren't actually allocating 
> any objects. The statement: 
> 
> Rational fraction; 
> 
> Allocates only enough memory to hold a reference -- its essentially a 
> pointer, so it probably is on the order of 4 bytes. It doesn't actually 
> allocate an object. 
> 
> Try changing it to: 
> 
> Rational fraction = new Rational(); 
> 
> And see what happens. However, even that is not guaranteed to allocate 
> any memory because the VM can optimize this allocation away since the 
> object is never used. 
> 
> A more interesting test might be to do the following: 
> 
> List<Rational> fractions = new ArrayList<Rational>(); 
> for (int I = 0; i< 100; i++) { 
>  fractions.add(new Rational()); 
>  println(runtime.freeMemory()); 
> } 
> fractions.empty(); 
> println(runtime.freeMemory()); 
> 
> +jeff (MJW) 
> --- 
> 
> "If you are going through hell, keep going." 
> -W. Churchill 
> 
> --------------------------------------------- 
> M. Jeff Wilson, Lead Member Technical Staff 
> AT&T Services, Inc. 
> Operations & Service Dev 
> jw9615 at att.com 
> +1 404.499.7235 
> -----Original Message----- 
> From: mcdaniel [mailto:521 at ofig.org] 
> Sent: Thursday, September 11, 2008 5:45 AM 
> To: Burr Sutter; ajug-members at ajug.org 
> Subject: [ajug-members] asked a different way 
> 
> why does this post/attached not show up on the ajug user/mail group? 
> 
> thanks 
> 
> barclay 
> >>>>>>>>>>>>>> 
> 
> let me ask this then, how can i display the amt of free-memory 
> before/after 10000 Rational objects are allocated, then not saved in a 
> variable- which makes them garbage? per (near how) the *attached* 
> screen-shot (fails to show) 
> 
> barclay 
> 
> barclay 
> 
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> 
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