This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Well, card games are typically played using cards - but I guess you already knew *that*... Seriously - I think you will have to be a little bit more specific with your question. What are your doubts?
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
You could start very simply by modelling a deck of cards and behavior that's common to all games: shuffling the deck, distributing cards to each player, organizing them by suit and rank. Every game uses card combinations in some way, so start with some simple add-em-up types: blackjack, fish, etc. Poker is a little more complicated, cribbage even more so (to get the logic right, anyway), so wait on those until you know how you want to do things.
Make visible what, without you, might perhaps never have been seen. - Robert Bresson