One of my favorite aspects of J.Cole is that he not only learned from the legends, but he incorporated their style into his own. For instance, in "Looking For Trouble", he says, "Never said I'm better than Hov but I'm the closest one", which is a shout out to Hov's classic BP line, "If I ain't better than Big, I'm the closest one."
In particular, Cole seems to incorporate a lot of Pac references to his work. The "See World" instrumental off the mixtape "Friday Night Lights" is Tupac's "Pain". And Cole makes quite obvious reference's to Pac's "Hail Mary" in "Enchanted" (also off Friday Night Lights).
Cole's "In the Morning" was definitely influenced by Pac's "Rather be Ya N.I.G.G.A." If you listen to the two back to back, you can easily tell how similar their styles are.