J&J's has always been one of the best places to go for lunch when I was a student at De Anza. Its location across the street is very convenient for students., but there is more to J&J.
The food is very affordable and for around $5 they feed you very well, and that is just the small portion. They have a diverse selection of meals available. The staff is amazing as they recognize the regulars even if they haven't been around for months.
The drawback is they only take cash, so if you have a debit or credit card than its a real bummer.