How Does New Jersey Define 'Disorderly Conduct'?

New Jersey's definition of "disorderly conduct" seems unnecessarily vague:

§ 2C:33-2. Disorderly conduct

a. Improper behavior. A person is guilty of a petty disorderly persons offense, if with purpose to cause public inconvenience, annoyance or alarm, or recklessly creating a risk thereof he

(1) Engages in fighting or threatening, or in violent or tumultuous behavior; or

(2) Creates a hazardous or physically dangerous condition by any act which serves no legitimate purpose of the actor.

b. Offensive language. A person is guilty of a petty disorderly persons offense if, in a public place, and with purpose to offend the sensibilities of a hearer or in reckless disregard of the probability of so doing, he addresses unreasonably loud and offensively coarse or abusive language, given the circumstances of the person present and the setting of the utterance, to any peson present.

"Public" means affecting or likely to affect persons in a place to which the public or a substantial group has access; among the places included are highways, transport facilities, schools, prisons, apartment houses, places of business or amusement, or any neighborhood.