Abso-freakin'-lutely. Just be careful you don't replace the nicotine with calories. Nicotine is both an appetite suppressant and a metabolic stimulant, take it away from most sedentary people and their appetites go haywire and they bloat up on junk food.
In any case, once you get it out of your system, you'll be much better off.
You say you've been training for a couple years, and at 5'9" x 190, I'm guessing you're a beast. There are plenty of guys on this board who are in exactly the same boat, working on shredding the last vestiges of bodyfat to bring out the difinition and vascularity. To be completely honest, I'm not the best cat to give advice on cutting, cuz I've never done it, and I'm not even going to consider a full-blown cutting phase until I hit 190 myself.
[edit] I wouldn't exactly cut out the java entirely. Unless you're drinking tons of Starbucks concoctions with loads of dairy and sugars -the fact is, caffeine in moderation can have a huge net benefit on your workouts. Improved focus and intensity, among other things.
<message edited by veggeep on Wednesday, July 29, 2009 12:29 PM>