Replacing system class loader

Question

Hi!
I'm trying to replace the system class loader for plugin management reasons. I've written a simple test app for testing, but it doesn't work. The first code is a ClassLoader, the second is the main code.
I try to run the code like this: java -Xbootclasspath/a:. -Djava.system.class.loader=A -cp . B
It uses my classloader every time, except for when I call Class.forName(). What could be the problem?
Thanks, Bal�zs
public class A extends java.lang.ClassLoader {
public A(ClassLoader parent) {
super(parent);
System.out.println("A loaded, parent is " + parent);
public Class loadClass(String name) throws java.lang.ClassNotFoundException {
try {
Class c = getParent().loadClass(name);
System.out.println("A was asked for " + name + " and delegated it to " + getParent());
return c;
} catch (ClassNotFoundException e) {
System.out.println("A was asked for " + name + " but didn't find it");
throw new ClassNotFoundException(name + " not found :[");
}; // ENDOF CLASS A
public class B {
public static void main(String[] args) {
(new B()).proc();
private void proc() {
System.out.println("Hello World!");
System.out.println("Class loader: " + getClass().getClassLoader());
try {
Class.forName("C");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}; // ENDOF CLASS B

Answer 1

Thanks for the reply. I think I've got a much better idea of how this stuff works now. I think what I need to do is register my deserializer with SOAP as a class that will really load the deserializer using Class.forName() with my class loader as a parameter. Then when the bootstrap class loader can't find a class, findClass() in my classloader will be called and I can load it from a URL.
Should work.
Thanks very much!