URLClassLoader + dynamically loading signed jar files

Question

I have an applet that does not know all of the jar files it will need to load at startup.
I would like to dynamically load these signed jar files using the URLClassLoader, however it does not recognize these jar files as being signed and I get java.security.AccessControlException: access denied errors.
Any suggestions?
Thanks!

Answer 1

Try this classloader for loading the jars, it should to the trick:
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLStreamHandlerFactory;
import java.security.AllPermission;
import java.security.CodeSource;
import java.security.PermissionCollection;
import java.security.Permissions;
public class AllPermissionsClassLoader extends URLClassLoader {
    public AllPermissionsClassLoader (URL[] urls) {
        super(urls);
    public AllPermissionsClassLoader (URL[] urls, ClassLoader parent) {
        super(urls, parent);
        System.out.println(parent);
    public AllPermissionsClassLoader (URL[] urls, ClassLoader parent, URLStreamHandlerFactory factory) {
        super(urls, parent, factory);
    protected PermissionCollection getPermissions (CodeSource codesource) {
        Permissions permissions = new Permissions();
        permissions.add(new AllPermission());
        return permissions;
}