I would like to know whether it is Haram for a Male Muslim to have a long beard and a long hair at the same time. As far as I know, a Male Muslim is advised to have long beard but I have a doubt on having a long hair. I heard from friend of mine that it's ok to have both long hair and long beard at the same time as long as you practice the religion correctly.

Praise be to Allah, the Lord of the World; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.

It is a duty to let one's beard grow. So, whoever shaves it is a sinner since the Prophet (Sallallahu Alaihi wa Sallam) said: "Differ from the polytheists: let your beards grow and shave your moustaches" . [Reported by Imam al-Bukhari ].
As for one's hair, a Muslim has the choice to shave, shorten or to let it grow. It is recorded in Sahih Muslim from " Anas (Radiya Allahu Anhu) that the hair of Allah's Messenger (Sallallahu Alaihi wa Sallam) touches his shoulders" .
Allah knows best.