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From Robert Clark <>
Subject Re: SystemClassLoader fails to load inside my own ant task
Date Thu, 20 Apr 2006 17:09:00 GMT
On Tuesday April 18, 2006 17:20, Marcel Ruff 
<> wrote:
> ...
> The uses following code:
>   Class clz = ClassLoader.getSystemClassLoader().loadClass(word);
> It seems the system class loader does not find my XbNotifyHandler
> class even that it is definitely in the CLASSPATH,
> i have also tried
>   <typedef >
>   <classpath> <pathelement location="..."
> with no success.
> But this is works fine:
>   Class clz =
> Thread.currentThread().getContextClassLoader().loadClass(cname);
> but i can't change the java.util.logging code to use the
> ContextClassLoader!
> How can i resolve this issue?

Ant loads classes and tasks using it's own classloader. If the 
java.util.logging code need to load a class using the system 
classloader, then the only way I know of to arrange this is to add it 
to the CLASSPATH environment variable *before* starting Ant.

I'd suggest you also consider filing a bug with Sun about this. there 
are some places in where they try the System 
classloader and then fall back on the context classloader and some 
places they do not. I don't see any reason not to fall back to the 
context classloader in all cases. This would allow the java.util 
logging to work with Ant as well.

- Rob

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