Помогите разобраться

public class MyClassLoader extends ClassLoader{

    @Override
    public Class<?> findClass(String name) throws ClassNotFoundException {
        Class clazz = null;

        try {
            byte[] buffer = Files.readAllBytes(Paths.get(name));
            clazz = defineClass(null, buffer, 0, buffer.length);
        } catch (IOException e) {
            e.printStackTrace();
        }

        return clazz;
    }
}

public static Set<? extends Animal> getAllAnimals(String pathToAnimals) {
       if (!pathToAnimals.endsWith("\\") && !pathToAnimals.endsWith("/"))
           pathToAnimals = pathToAnimals + "/";

       Set<Animal> set = new HashSet<>();
       File[] dir = new File(pathToAnimals).listFiles();

       for (File f : dir) {
           try {
               if (f.isFile() && f.getName().contains(".class")) {
                   MyClassLoader loader = new MyClassLoader();
                   Class<?> clazz = loader.loadClass(f.getAbsolutePath());

                   if (Animal.class.isAssignableFrom(clazz)) {
                       Constructor<?> constructor = clazz.getConstructor();
                       set.add((Animal) constructor.newInstance());
                   }
               }
           } catch (Exception e) {
           }
       }
       return set;
   }