What happens to your New Jersey license depends, to some extent, upon the state in which you get the ticket. All states (and the District of Columbia) share violation information with New Jersey through something called the Driver License Compact, except Georgia, Massachusetts, Michigan, Tennessee and Wisconsin.
If you get a ticket for a moving violation (like speeding) in one of the Compact states, you will get two points against your license in addition to the fines and penalties assessed by that state's traffic court.
If you get a ticket for a moving violation in any of the adjoining or nearby states (except Massachusetts), you will get a maximum of two (2) points, along with the fines and penalties of that state, but can get your license suspended if you do not comply with the sentencing terms. Detailed information is available on the New Jersey Motor Vehicle Commission web site.
If you are looking for more information on New Jersey's traffic laws, then download my free book, A Guide to Driving Legally in NJ, and Surviving Traffic Court If You Don't.