My Java games! MasterMind, Othello/Reversi, Reaction Timer & Random Number Game

Not sure where to put this, so if you have to remove it, please tell me where it should go before deleting it :).

Hi there! I started learning Java last September in school and for practice I have made some console based games. So instead of them just gathering dust I though I'd share them, because they're not terrible and feedback is always nice (also they may help beginners if they want to analyse my code )

1) First up is my latest and most complex creation 'Reversi', otherwise known as Othello. It is a board game, which I made into a java app. The hardest part here was to get to check for invalid positions and also to flip the tiles (which I'm fairly certain is does properly now!)

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Link to Othello/Reversi info: Reversi - Wikipedia, the free encyclopedia

2) Next up is 'MasterMind'! A fairly straight forward, code cracking based game, which is also very challenging . The hardest part when it came to creating this was probably creating the logic to check how close you're guess was, but since I'm always improving it seems pretty simple now :P.

Download .Jar: MEGAUPLOAD - The leading online storage and file delivery service

Source Code: MEGAUPLOAD - The leading online storage and file delivery service

Link to MasterMind info: Mastermind (board game) - Wikipedia, the free encyclopedia

3) Next up is my simplest game, a 'Reaction Tester'! (Does what it says on the tin). Even though this is my simplest game, with two difficulties, it also proves to be my second most popular after Othello/Reversi.

Download .Jar: MEGAUPLOAD - The leading online storage and file delivery service

Source Code: MEGAUPLOAD - The leading online storage and file delivery service

4) Finally it is my first every game, that I made in Java . At the time it seemed incredibly complicated, but now it seems far too simple. But don't be fooled by the dull name, it is pretty entertaining with a two player option, where you and a friend compete to guess your own mystery number first with 'warmer', 'colder' clues .

Download .Jar: MEGAUPLOAD - The leading online storage and file delivery service

Source Code: MEGAUPLOAD - The leading online storage and file delivery service