This is just a utility i created joining these blog posts:

How can I count the number of methods in a Java class ?
and 
Get All Classes Within A Package

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

/**
 * Counts the number of classes and methods in a package.
 */
public class CountPackageMethods {
    /**
     * Scans all classes accessible from the context class loader which belong to the given package and subpackages.
     *
     * @param packageName The base package
     * @return The classes
     * @throws ClassNotFoundException
     * @throws java.io.IOException
     */
    private static Class[] getClasses(String packageName)
            throws ClassNotFoundException, IOException {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        assert classLoader != null;
        String path = packageName.replace('.', '/');
        Enumeration<URL> resources = classLoader.getResources(path);
        List<File> dirs = new ArrayList<>();
        while (resources.hasMoreElements()) {
            URL resource = resources.nextElement();
            dirs.add(new File(resource.getFile()));
        }
        ArrayList<Class> classes = new ArrayList<Class>();
        for (File directory : dirs) {
            classes.addAll(findClasses(directory, packageName));
        }
        return classes.toArray(new Class[classes.size()]);
    }

    /**
     * Recursive method used to find all classes in a given directory and subdirs.
     *
     * @param directory   The base directory
     * @param packageName The package name for classes found inside the base directory
     * @return The classes
     * @throws ClassNotFoundException
     */
    private static List<Class> findClasses(File directory, String packageName) throws ClassNotFoundException {
        List<Class> classes = new ArrayList<Class>();
        if (!directory.exists()) {
            return classes;
        }
        File[] files = directory.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                assert !file.getName().contains(".");
                classes.addAll(findClasses(file, packageName + "." + file.getName()));
            } else if (file.getName().endsWith(".class")) {
                classes.add(Class.forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6)));
            }
        }
        return classes;
    }

    public static void main(String args[]){
        int noOfClasses= 0, noOfMethods = 0;
        try{
            Class[] classes = getClasses(args[0]);
            noOfClasses = classes.length;
            for ( Class className : classes) {
                Method[] methods= className.getMethods();
                System.out.println("Number of methods in "+className+" = "+methods.length);
                noOfMethods += methods.length;
            }
        }catch(ClassNotFoundException classNotFoundException){
            System.out.println("Class could not be found!");
        } catch (IOException ioe) {
            System.out.println("Package could not be found!");
        } catch (ArrayIndexOutOfBoundsException aiob) {
            System.out.println("Please provide a package name in the arguments");
        }
        System.out.println("No of Classes" + noOfClasses);
        System.out.println("No of Methods" + noOfMethods);
    }
}