C.J.
First of all if you havent already done so, ask him why he hits. Then explain to him that you dont hit people, and that if he continues to hit, he can not play with other kids. Tell him that hitting hurts, and that hittng is not how you treat people you love. He may or may not understand, so just let him know that he will have to stay in the house and play all by himself if he still wants to hit.