Poker-AI.org

I'm not sure about the Java side of things as I don't use it but I'm sure you'd find something useful if you try various combinations of "java rayw 2+2 poker evaluator". I use the 2+2 lookup table to rank hands within a self coded Monte Carlo evaluator for HU, however it was originally designed for doing full enumerations. My basic MC algorithm does the following:

1. deal a random hand from your opponents range (e.g. top 40%, etc)
2. deal random cards until we have 5 community cards (e.g. deal turn & river if we know the flop cards, etc)
3. use lookup table to get a ranking for each player
4. decide which player wins (or ties)
5. repeat for as many iterations as you want (I use a fixed time of 2.5 seconds)

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www.bespokebots.com

AI isn't that difficult...

If IsMyTurn then Shove;

Simple isn't it ?