/**
     * Finds and loads the class with the specified name from the URL search
     * path. Any URLs referring to JAR files are loaded and opened as needed
     * until the class is found.
     *
     * @param name the name of the class
     * @return the resulting class
     * @exception ClassNotFoundException if the class could not be found,
     *            or if the loader is closed.
     */

    protected Class<?> findClass(final String name)
         throws ClassNotFoundException
    {

  {- -------------------------------------------
  (1) java.net.URLClassLoader.defineClass() を呼んで, 
      name 引数で指定されたクラスをロードする.
      ---------------------------------------- -}

            try {
                return AccessController.doPrivileged(
                    new PrivilegedExceptionAction<Class>() {
                        public Class run() throws ClassNotFoundException {
                            String path = name.replace('.', '/').concat(".class");
                            Resource res = ucp.getResource(path, false);
                            if (res != null) {
                                try {
                                    return defineClass(name, res);
                                } catch (IOException e) {
                                    throw new ClassNotFoundException(name, e);
                                }
                            } else {
                                throw new ClassNotFoundException(name);
                            }
                        }
                    }, acc);
            } catch (java.security.PrivilegedActionException pae) {
                throw (ClassNotFoundException) pae.getException();
            }
        }