I'm not sure why you think that you are behind here. He could well have AQ or KQ, (suited or not) or less depending on how loose they are. I think you need to take a stab at the pot to see where you are. Your opp may put you on a high PP and not necessarily on just overcards. As xbones says a pot size bet is probably the best bet here. If they are ahead with a PP of some kind that is less than the J then they have the difficult decision to make.