Sun's java vs. gij : Own classloader and static attributes

Tue Jun 22 16:05:00 GMT 2004

Hi folks,
I just stumbled over a different behaviour of how the java interpreters
handle static variables in classes loaded using a self written
classloader.
I am using a class containing a static attribute (e.g.)
 public class MyStatic {
 static int value; 
 }
I defined my class loader that has a loadClass-Method which simply loads
the class data into an array:
 public Class loadClass(String name) throws ClassNotFoundException {
	System.out.println("MyClassLoader.loadClass("+name+")"); 
	byte[] data = ... obtain class data
	Class c = defineClass(name, data, 0, len);
	resolveClass(c);
	return c;
 }
Using this class loader I load a simple class:
public class Loaded {
 public Loaded() {
	System.out.println("In Loaded: Value is "+MyStatic.value);
 }
}
The following test program 
public class Test {
 public static void main(String[] args) throws Exception {
	MyStatic.value = 5;
	System.out.println("Value is "+MyStatic.value);
	MyClassLoader loader = new MyClassLoader();
	Class cls = loader.loadClass("Loaded");
	cls.newInstance();	
 }
}
produces different results when executed using "java" or "gij".
---Using Sun's java----------------------
Value is 5
MyClassLoader.loadClass(Loaded)
MyClassLoader.loadClass(java.lang.Object)
MyClassLoader.loadClass(java.lang.System)
MyClassLoader.loadClass(java.lang.StringBuffer)
MyClassLoader.loadClass(MyStatic)
MyClassLoader.loadClass(java.io.PrintStream)
In Loaded: Value is 0
MyClassLoader.loadClass(java.lang.Class)
---Using GNU gij--------------------------
Value is 5
MyClassLoader.loadClass(Loaded)
In Loaded: Value is 5
I figured that I still don't use my ClassLoader subclass the correct
way, since it should only load that classes that haven't been loaded so
far and I think I better overwrite the findClass-Method. 
But anyway: Is the different behaviour of gij considered a bug or
feature?
Regards,
 Stefan
-- 
-----------------------------------------------------
Stefan Prelle
eMail: stefan@prelle.org
ICQ : 9800462
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: Dies ist ein digital signierter Nachrichtenteil
URL: <http://gcc.gnu.org/pipermail/java/attachments/20040622/74b14e2b/attachment.sig>