A generic class to retrive public methods and their names from a class.

Spy.java

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

import static java.lang.System.out;

public class Spy {

    public static List<Method> publicMethods(Class<?> clazz) {
        List<Method> results = new ArrayList<>();
        Method[] methods = clazz.getDeclaredMethods();

        for (Method method : methods) {
            if (!method.isSynthetic()) {
                int modifiers = method.getModifiers();
                if ((modifiers & Modifier.PUBLIC) == Modifier.PUBLIC) {
                    results.add(method);
                }
            }
        }

        return results;
    }

    public static List<String> publicMethodNames(Class<?> clazz) {
        List<String> results = new ArrayList<>();
        List<Method> methods = publicMethods(clazz);

        for (Method method : methods) results.add(method.getName());

        return results;
    }

    private static int modifierFromString(String s) {
        int m = 0x0;
        if ("public".equals(s))           m |= Modifier.PUBLIC;
        else if ("protected".equals(s))   m |= Modifier.PROTECTED;
        else if ("private".equals(s))     m |= Modifier.PRIVATE;
        else if ("static".equals(s))      m |= Modifier.STATIC;
        else if ("final".equals(s))       m |= Modifier.FINAL;
        else if ("transient".equals(s))   m |= Modifier.TRANSIENT;
        else if ("volatile".equals(s))    m |= Modifier.VOLATILE;
        return m;
    }
}