Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: Stanimir Stamenkov <s7an10@netscape.net>
Newsgroups: comp.lang.java.programmer
Subject: Re: Avoid creating a stacktrace prior to JDK 1.7
Date: Sat, 01 Oct 2011 13:27:39 +0300
Organization: A noiseless patient Spider
Lines: 42
Message-ID: <j66puk$h0j$1@dont-email.me>
References: <j64ht6$o64$1@news.albasani.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 1 Oct 2011 10:27:32 +0000 (UTC)
Injection-Info: mx04.eternal-september.org; posting-host="7eOF4vEIiUU6n7fF+lWgFg"; logging-data="17427"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/r1/HeNShQYdhrxrIpaVvT"
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0.1) Gecko/20110928 Firefox/7.0.1 SeaMonkey/2.4.1
In-Reply-To: <j64ht6$o64$1@news.albasani.net>
X-Face: "@)%Vlap6d%OVYDS}B4YUWE@yUy+^!w/+.q.,c5kjI#+uG?kYP&r/pTjNWgo:g[A,O=AL3/ j&4Le2cau$<e=FPq~GbeZ6DW1Grey[VHn8?ktzvoQtzlg;]&rh8g]CD+_BC7d[gW{Yx&_X*4Q$h&nJ l@t(|4R4:T='&]U#ui+z9OC$.~gJjU93kh:Ojc$Cz0n#I9!~!9ay?E<UlW&5,IFX1*KtA>MYEFst$y y"m]M7tq\S(>[a$x0x8%S
Cancel-Lock: sha1:2ZqP4w5Q0TYavXf/xR5IYkHd7fc=
Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:8436

Fri, 30 Sep 2011 15:57:57 +0200, /Jan Burse/:

> I have the following code deep down in a
> recursion which eats up a lot of stack.
> The recursion is not shown but only
> the code:
>
>      Class<?> class;
>      try {
>          class = Class.forName(str);
>      } catch (ClassNotFoundException x) {
>          class = null;
>      }
>
> Will it every time I call it for a
> non-existing class build the whole stack
> trace for the exception x and then
> immediately forget about it?

I guess so.

> [...]
> Can I instruct an exception
> to not fill the stack trace? And way
> arround?

You may perform a check which avoids the exceptional situation like:

     Class<?> class;
     try {
         class = (Class.getResource(str + ".class") != null)
                 ? Class.forName(str)
                 : null;
     } catch (ClassNotFoundException x) {
         class = null;
     }

The Class.forName(String) could still fail if the access to the 
resource content is restricted, I imagine.

-- 
Stanimir