Java Reflection Method Invoke

package me.rehabcz.testfx.base;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Utility class for working with reflections
 * @author rehabcz
 */
public class ReflectionUtils {

    /**
     * Invokes class method without direct instance of class
     * @param obj Class reference
     * @param methodName Name of referenced method
     * @param params Parameter to pass in referenced method
     * @return Result of invoked method
     */
    public static Object invokeMethod(Class<?> obj, String methodName, Object...params) {
        int paramCount = params.length;
        Method method;
        Object requiredObj = null;
        Class<?>[] classArray = new Class <?>[paramCount];
        for (int i = 0; i < paramCount; i++) {
            classArray[i] = params[i].getClass();
        }
        try {
            Object o = obj.getDeclaredConstructor().newInstance();
            method = o.getClass().getDeclaredMethod(methodName, classArray);
            method.setAccessible(true);
            requiredObj = method.invoke(o, params);
        } catch (InstantiationException | NoSuchMethodException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            e.printStackTrace();
        }

        return requiredObj;
    }

    /**
     * Invokes class method using existing object instance
     * @param obj Object instance
     * @param methodName Name of referenced method
     * @param params Parameter to pass in referenced method
     * @return Result of invoked method
     */
    public static Object invokeMethod(Object obj, String methodName, Object...params) {
        int paramCount = params.length;
        Method method;
        Object requiredObj = null;
        Class<?>[] classArray = new Class <?>[paramCount];
        for (int i = 0; i < paramCount; i++) {
            classArray[i] = params[i].getClass();
        }
        try {
            method = obj.getClass().getDeclaredMethod(methodName, classArray);
            method.setAccessible(true);
            requiredObj = method.invoke(obj, params);
        } catch (NoSuchMethodException | IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
            e.printStackTrace();
        }

        return requiredObj;
    }
}