Добавить classpath в ClassLoader

public class Loader extends ClassLoader {
 
public void setPath(String s) {
File file = new File(s);
try {
            URL classUrl = file.toURI().toURL();
            URL[] urls = new URL[]{classUrl};
            ClassLoader ucl = new URLClassLoader(urls);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
}

Loader load = new Loader;
load.setPAth(directoryName);
Class clazz = (ClassLoader) load.loadClass(className);

 public class Loader extends ClassLoader {
 
 private String path;
 
public void setPath(String s) {
path = s;
}
 
@Override
    public Class loadClass(String name){
        File file = new File(path);
        if (!file.isDirectory()) {
            throw new IllegalArgumentException();
        }
        Class clazz = null;
        try {
            URL classUrl = file.toURI().toURL();
            URL[] urls = new URL[]{classUrl};
            ClassLoader ucl = new URLClassLoader(urls);
            clazz = ucl.loadClass(name);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return clazz;
    }
}