GameServer Class Reference

Tic-Tac-Toe Server to handle two-player games over the network. More...

Collaboration diagram for GameServer:

Classes
class	PlayerHandler
	Internal class to handle player connections.

Static Public Member Functions
static void	main (String[] args) throws Exception
	Main method to run the server.

Static Private Member Functions
static synchronized char	checkWin ()
	Check if a player has won the game.
static synchronized boolean	makeMove (int row, int col, char symbol)
	Make a move on the board.

Static Private Attributes
static char[][]	board = new char[3][3]
static boolean	gameEnded = false
static PlayerHandler	playerO
static PlayerHandler	playerX
static final int	PORT = 8901

Detailed Description

Tic-Tac-Toe Server to handle two-player games over the network.

COMP2396 Assignment 5

Author

Cheng Ho Ming, Eric (3036216734)

Definition at line 9 of file GameServer.java.

Member Function Documentation

checkWin()

static synchronized char GameServer.checkWin ( )

inlinestaticprivate

Check if a player has won the game.

Returns

The winning player's symbol ('X' or 'O'), or 'D' for draw, or '\0' if no winner

Definition at line 68 of file GameServer.java.

                                                {
        // Check rows
        for (int i = 0; i < 3; i++) {
            if (board[i][0] == board[i][1] &&
                board[i][1] == board[i][2] &&
                board[i][0] != '\0') {
                return board[i][0];
            }
        }
        // Check columns
        for (int i = 0; i < 3; i++) {
            if (board[0][i] == board[1][i] &&
                board[1][i] == board[2][i] &&
                board[0][i] != '\0') {
                return board[0][i];
            }
        }
        // Check diagonals
        if (board[0][0] == board[1][1] &&
            board[1][1] == board[2][2] &&
            board[0][0] != '\0') {
            return board[0][0];
        }
        if (board[0][2] == board[1][1] &&
            board[1][1] == board[2][0] &&
            board[0][2] != '\0') {
            return board[0][2];
        }
        // Check for draw
        boolean draw = true;
        for (int i = 0; i < 3 && draw; i++) {
            for (int j = 0; j < 3 && draw; j++) {
                if (board[i][j] == '\0') {
                    draw = false;
                }
            }
        }
        if (draw) return 'D';
        return '\0';
    }

References board.

main()

static void GameServer.main ( String[] args ) throws Exception

inlinestatic

Main method to run the server.

Parameters

args	Command-line arguments

Exceptions

Exception

Definition at line 21 of file GameServer.java.

                                                            {
        ServerSocket listener = new ServerSocket(PORT);
        System.out.println("Tic-Tac-Toe Server is Running...");
        try {
            while (true) {
                Socket socket = listener.accept();
                if (playerX == null) {
                    playerX = new PlayerHandler(socket, 'X');
                    System.out.println("Player X connected.");
                    Thread playerX_Thread = new Thread(playerX);
                    playerX_Thread.start();
                } else if (playerO == null) {
                    playerO = new PlayerHandler(socket, 'O');
                    System.out.println("Player O connected.");
                    Thread playerO_Thread = new Thread(playerO);
                    playerO_Thread.start();
                } else {
                    // Reject additional players to prevent overload
                    PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
                    out.println("SERVERFULL");
                    socket.close();
                }
            }
        } finally {
            listener.close();
        }
    }

References playerO, playerX, and PORT.

makeMove()

static synchronized boolean GameServer.makeMove ( int row, int col, char symbol )

inlinestaticprivate

Make a move on the board.

Parameters

row	The row of the move
col	The column of the move
symbol	The player's symbol ('X' or 'O')

Returns

True if the move is valid, false otherwise

Definition at line 56 of file GameServer.java.

                                                                                {
        if (board[row][col] == '\0') {
            board[row][col] = symbol;
            return true;
        }
        return false;
    }

References board.

Member Data Documentation

board

char [][] GameServer.board = new char[3][3]

staticprivate

Definition at line 13 of file GameServer.java.

Referenced by checkWin(), and makeMove().

gameEnded

boolean GameServer.gameEnded = false

staticprivate

Definition at line 14 of file GameServer.java.

playerO

PlayerHandler GameServer.playerO

staticprivate

Definition at line 12 of file GameServer.java.

Referenced by main().

playerX

PlayerHandler GameServer.playerX

staticprivate

Definition at line 11 of file GameServer.java.

Referenced by main().

PORT

final int GameServer.PORT = 8901

staticprivate

Definition at line 10 of file GameServer.java.

Referenced by main().

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The documentation for this class was generated from the following file:

• assignment5/GameServer.java