What public trans can take me from Manhattan to Nets Stadium?

http://www.trips123.com/trip_planner/default.asp

will give you routing with public transportation (subway/bus/commuter rail/walking) for the greater NYC area into NY/NJ/CT. Just enter your address ("East Village" works fine too), and "Meadowlands" for your destination.)

Basically, you'll have to find your way over to the Port Authority Bus Terminal at West 41st St. (probably you'll take the N,R,W subway at the Union Square station or 8th St/NYU station, and go over to the Times Square/42nd St. stop and walk), and take the NJ Transit bus #129

Get to Port Authority ("N", "Q", "R", or "W" train from 8th Street/NYU) to Times Square and walk through the long corridor towards the "A", "C", and "E" trains..then get out at around 41st Street to enter Port Authority.) and there are schedules for New Jersey Transit that head out to the Meadowlands Sports Center.

take the the New Jersey transit

new Jersey transit