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java class loader basic question..

Cloey Tan
Ranch Hand

Joined: Feb 03, 2009
Posts: 60
Hi there, i have a basic java class loader question here,

with, is the path of a class which i intend to load and its inside the same package as my current class.
But the class 'c' loaded is always null, perhaps this is not the correct way? The following is the content which i get from some resources on the internet.

Please guide or help or comment, thanks in advance.
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42965

}catch(Exception e){
return null;

You need to put in some proper error handling, like at least notifying you if there is a problem.

I'm also not quite sure what the point of this ClassLoader is - after a cursory inspection it seems to look at the classpath, so any classes would be loaded by the standard classloaders, and never by the loadClassData method.

String classPath = ((String)ClassLoader.getSystemResource(className.replace('.',File.separatorChar)+".class").getFile()).substring(1);

This line looks rather strange to me; what's it supposed to do?

I'll move this to the Intermediate forum - loading classes is not beginner stuff.
I agree. Here's the link:
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