gistfile1.txt

    public static Observer loadObserver(String path, ISender server, int id) {
        File file = new File(path);

        try {
            URL url = file.getParentFile().toURI().toURL();
            URL[] urls = new URL[]{url};

            // Create a new class loader with the directory
            ClassLoader cl = new URLClassLoader(urls);

            // Load in the class; MyClass.class should be located in
            Class cls = cl.loadClass(file.getName().replaceFirst("[.][^.]+$", ""));
            return (Observer) cls.getDeclaredConstructor(ISender.class, int.class).newInstance(server, id);
        } catch (Exception e) {
        }
        return null;
    }