instantiate classes from jar based on annotation

jarload.java

public class Main {

    public static void main(String[] args) {
        load("test/1.jar");
        load("test/2.jar");
    }
    private static void load(String path) {

        try {
            ClassLoader cl = new URLClassLoader(new URL[] { new File(path).toURL()});
            JarFile jarFile = new JarFile(path);
            Enumeration<JarEntry> entries = jarFile.entries();
            while (entries.hasMoreElements()) {
                JarEntry entry = entries.nextElement();
                if (!entry.getName().endsWith(".class")) continue;

                System.out.println(entry);
                String className = entry.getName().substring(0, entry.getName().length()-6);
                System.out.println("classname " + className);
                Class<?> c = cl.loadClass(className);
                Service sa = c.getAnnotation(Service.class);
                if (sa == null) continue;

                Object o = c.newInstance();
                Method m = c.getDeclaredMethod("execute");
                System.out.println("=====executing path="+sa.path());
                m.invoke(o);
                System.out.println("=====");


            }

        } catch (IOException | ClassNotFoundException | NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
            e.printStackTrace();
        }

    }
}