Interface for chess game

Hi all,
I am new to java and in the process of finding a job. Last week i was asked by an interviewer how to design an interface for a chess game and implement it in a class. Pls. someone help with the best answer i can give.
Thanks in Advance !

johndjr wrote:
I am new to java and in the process of finding a job. Last week i was asked by an >interviewer how to design an interface for a chess game and implement it in a class. Pls. someone help with the best answer i can give.When you don't know say, "I don't know".
If you have to ask us you will never be able to pull off the fake.
back when I had to interview people I would take an honest I don't know or I'm not familiar with that over someone trying to make up an answer and looking like a fool.Interviewees were also required to answer questions on the spot rather than being given time to search the internet and prepare a canned response.
In fact in any job interview I've ever had (the last not 2 years ago) that was still the norm.

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http://www.mediafire.com/?rh32jk5niua37kl
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- The chess board:
Currently, I have a class handling the drawing of the
board, getting the screen-coordinates, etc.. The
class "GameBoard" extends a JPanel and I overwrite
the "paintComponent"-method to draw the board.
I have a second class "Field" that stores
informations of one field: What color the field is,
which piece is placed on this field and which player
"owns" it. Also, each one of these "Field" is getting
passed its coordinates on the screen from
"GameBoard". This helps me later, when I want to
decide, if the field is clicked or not.
Now, is this a good way to implement the board and
the fields? I have another option, which would be,
that I throw out the class "GameBoard" and instead
have a "FieldHandler" class. Now, the class "Field"
would extend JPanel, overwrite "paintComponent" and
draw a square on the screen. "FieldHandler" gives
each "Field" the information, if it should be black
or white. "FieldHandler" would also calculate the x-
and y-coordinates for each field.
Is this method better? I don't really knowWhat I'd do: just paint a chessboard pattern from a static image. Can be loaded from a file, or can be generated once dynamically. Don't care at all about fields.
Have some pixel-to-field coordinate mapping somewhere. Should be nothing but a simple multiplication.
Have a List of chess pieces. Have those know what they look like (maybe using a delegate object which contains an image), have those know where they are and where they can go. When painting, iterate over the list, transform the coordinates to pixels, get the UI delegate and paint its image. Why bother calculating 64 fields if all you have are 32 pieces or less? And whether a field is black or white doesn't matter to the game.
When the user clicks onto the board, get the coordinates of the click and transform them to the field coordinates, that you can then look up in the list of figures. If you find one, you can still paint a marker onto the board and underneath the piece image.
This is what I'd do. Other approaches might make sense as well..

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I have to create a text-based chess game between uppercase and lowercase letters against each other using a two-dimensional arrays.
1. I have to create the board and initialize the position of the letters.
2. I have to give the output of the initial state of the game, showing the board and the first positions of the letters.
3. I have to create the moves.(Meaning that i have to create an input to perform the entering moves)
And i have to make sure that with every bad input the program will to repeat the input....
If anybody of you have programmed a chess game like this before, i would appreciate any kind of help....
Edited by: 812599 on Nov 17, 2010 8:26 AM

mario.beka wrote:
meacod wrote:
812599 wrote:
I have to create a text-based chess game between uppercase and lowercase letters against each other using a two-dimensional arrays.
1. I have to create the board and initialize the position of the checkers.Just to give you a nudge - are you familiar with chess? What's the size of the board? How might that affect the structure you store your 'pieces' in? How will you represent pawns as opposed to kings, queens, rooks, and so forth?
Scratch out some ideas on paper,
Turn that into some pseudocode,
Write some Java,
Then come back to us if you have a specific question.Yeah that's the problem, cuz i have never played chess in my life....I'm just reading around now for the rules and movements of this game...in that case, don't bother.
A decent chess program requires in-depth knowledge of the game, knowledge only gained through years of playing it at competition level.
I've a small library of books about chess, have played it for going on 30 years, plus 15 years experience using Java professionally, and I'd not consider writing a chess playing program in Java as something I'd undertake on my own (and yes, I've studied the possibility of writing just that in a variety of languages I know about over the years, and even made a start a few times only to abandon it when the project became too big for me to handle).
If you're only looking to make a digital chessboard, that's a much simpler task and one that you can certainly attempt even without knowing the game (except maybe the starting positions and accepted icons for the pieces and the size and nomenclature for the board and its fields).
Start with that, then add rules validation as players move pieces. Start with large rules (like enforcing that pieces can only move legally, in itself a somewhat daunting task as there are several pitfalls and special rules depending on piece positions).
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I have created chess game on Oracle Developer Form 2000 6i & my problem is that i have created some function for moving of Bishops, Kings, Queen, Knight etc. on Push Button and my Function of Knight is ..
FUNCTION check_move_knight(p_from in varchar2, p_to in varchar2) RETURN BOOLEAN IS
BEGIN
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Hi:
This isn't really an earth-shattering problem, but I've found that the Chess game that is resident in Mac OS hangs up in Leopard. I'll be playing a game, and all of a sudden, the computer will simply not make a move, and that's it. Can't undo, can't go forward. Doesn't seem to matter whether I have the computer set to play stronger or faster.
This never happened in 10.4 on my old Quicksilver G4, and I was wondering if anyone has any experience or insight into this?
Thanks.

The problem seems to be a bug in the logic, although I have not looked at the code to confirm it. For those that have the time, I have included the game log to cause the game to fail. From that, you should be able to identify the problem and offer a fix. Note, the earlier Chess version (2.1) running on Tiger does not seem to have the same bug, but the issue it could very well be an OS issue.
Chess version 2.3, running Leopard on MacBook Pro.
Player is White; Computer is Black (obviously);
Moves:
1. d2-d4 d7-d5
2. h2-h4 a7-a5
3. h4-h5 a5-a4
4. Nb1-c3 Nb8-c6
5. e2-e4 e7-e5
6. e4xd5 Nc6xd4
7. Ng1-f3 a4-a3
8. b2-b3 Nd4xf3
9. Qd1xf3 Bc8-d7
10. g2-g4 Bf8-d6
11. Nc3-e4 Bd6-b4
12. c2-c3 Bb4-e7
13. g4-g5 f7-f5
14. g5xf6 Ng8xf6
15. Ne4xf6 g7xf6
16. h5-h6 Rh8-g8
17. Qf3-h5 Rg8-g6
To get Chess to "hang", White has to place the Black Rook at G6 in jeopardy by either moving White's Rook at H1 to G1 or White's Bishop at F1 to D3...either move will cause Chess to "hang" as Black never recovers and makes a move. The bug is inconsistent in that moving White's Rook at H1 to H2 and then from H2 to G2 does not cause the bug, but moving White's Bishop from F1 to E2 and then to D3 when Black's Rook at G6 is exposed (Black moves pawn F6 to F5 and then to F4) does cause the bug.
On my system, this is the only time it hangs. Higher skill levels have never caused Chess to hang.
Happy Bug Hunting.
First one to fix it wins.
-911eDoc

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I have finally completed the first launch of my AFCS chess game.
Hopefully it will turn out to be a worthy example of what is possible with AFCS.
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