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Thread: tic tac toe game problem with X and O

  1. #1
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    Default tic tac toe game problem with X and O

    So, bassicly i got my program working, but the main problem i have is that when a player makes move in program, it doesn't man X or O on the playborad, but keeps it in mind. I need to mark them, so that user could se where he made his move. I would be very thankful if someone could help me fix this - > code below:
    The server
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.ServerSocket;
    import java.net.Socket;
     
    public class TicTacToeServer {
     
        /**
         * Runs the application. Pairs up clients that connect.
         */
        public static void main(String[] args) throws Exception {
            ServerSocket listener = new ServerSocket(8901);
            System.out.println("Tic Tac Toe Server is Running");
            try {
                while (true) {
                    Game game = new Game();
                    Game.Player playerX = game.new Player(listener.accept(), 'X');
                    Game.Player playerO = game.new Player(listener.accept(), 'O');
                    playerX.setOpponent(playerO);
                    playerO.setOpponent(playerX);
                    game.currentPlayer = playerX;
                    playerX.start();
                    playerO.start();
                }
            } finally {
                listener.close();
            }
        }
    }
     
    /**
     * A two-player game.
     */
    class Game {
     
        /**
         * A board has nine squares.  Each square is either unowned or
         * it is owned by a player.  So we use a simple array of player
         * references.  If null, the corresponding square is unowned,
         * otherwise the array cell stores a reference to the player that
         * owns it.
         */
        private Player[] board = {
            null, null, null,
            null, null, null,
            null, null, null};
     
        /**
         * The current player.
         */
        Player currentPlayer;
     
        /**
         * Returns whether the current state of the board is such that one
         * of the players is a winner.
         */
        public boolean hasWinner() {
            return
                (board[0] != null && board[0] == board[1] && board[0] == board[2])
              ||(board[3] != null && board[3] == board[4] && board[3] == board[5])
              ||(board[6] != null && board[6] == board[7] && board[6] == board[8])
              ||(board[0] != null && board[0] == board[3] && board[0] == board[6])
              ||(board[1] != null && board[1] == board[4] && board[1] == board[7])
              ||(board[2] != null && board[2] == board[5] && board[2] == board[8])
              ||(board[0] != null && board[0] == board[4] && board[0] == board[8])
              ||(board[2] != null && board[2] == board[4] && board[2] == board[6]);
        }
     
        /**
         * Returns whether there are no more empty squares.
         */
        public boolean boardFilledUp() {
            for (int i = 0; i < board.length; i++) {
                if (board[i] == null) {
                    return false;
                }
            }
            return true;
        }
     
        /**
         * Called by the player threads when a player tries to make a
         * move.  This method checks to see if the move is legal: that
         * is, the player requesting the move must be the current player
         * and the square in which she is trying to move must not already
         * be occupied.  If the move is legal the game state is updated
         * (the square is set and the next player becomes current) and
         * the other player is notified of the move so it can update its
         * client.
         */
        public synchronized boolean legalMove(int location, Player player) {
            if (player == currentPlayer && board[location] == null) {
                board[location] = currentPlayer;
                currentPlayer = currentPlayer.opponent;
                currentPlayer.otherPlayerMoved(location);
                return true;
            }
            return false;
        }
     
        /**
         * The class for the helper threads in this multithreaded server
         * application.  A Player is identified by a character mark
         * which is either 'X' or 'O'.  For communication with the
         * client the player has a socket with its input and output
         * streams.  Since only text is being communicated we use a
         * reader and a writer.
         */
        class Player extends Thread {
            char mark;
            Player opponent;
            Socket socket;
            BufferedReader input;
            PrintWriter output;
     
            /**
             * Constructs a handler thread for a given socket and mark
             * initializes the stream fields, displays the first two
             * welcoming messages.
             */
            public Player(Socket socket, char mark) {
                this.socket = socket;
                this.mark = mark;
                try {
                    input = new BufferedReader(
                        new InputStreamReader(socket.getInputStream()));
                    output = new PrintWriter(socket.getOutputStream(), true);
                    output.println("WELCOME " + mark);
                    output.println("MESSAGE Waiting for opponent to connect");
                } catch (IOException e) {
                    System.out.println("Player died: " + e);
                }
            }
     
            /**
             * Accepts notification of who the opponent is.
             */
            public void setOpponent(Player opponent) {
                this.opponent = opponent;
            }
     
            /**
             * Handles the otherPlayerMoved message.
             */
            public void otherPlayerMoved(int location) {
                output.println("OPPONENT_MOVED " + location);
                output.println(
                    hasWinner() ? "DEFEAT" : boardFilledUp() ? "TIE" : "");
            }
     
            /**
             * The run method of this thread.
             */
            public void run() {
                try {
                    // The thread is only started after everyone connects.
                    output.println("MESSAGE All players connected");
     
                    // Tell the first player that it is her turn.
                    if (mark == 'X') {
                        output.println("MESSAGE Your move");
                    }
     
                    // Repeatedly get commands from the client and process them.
                    while (true) {
                        String command = input.readLine();
                        if (command.startsWith("MOVE")) {
                            int location = Integer.parseInt(command.substring(5));
                            if (legalMove(location, this)) {
                                output.println("VALID_MOVE");
                                output.println(hasWinner() ? "VICTORY"
                                             : boardFilledUp() ? "TIE"
                                             : "");
                            } else {
                                output.println("MESSAGE ?");
                            }
                        } else if (command.startsWith("QUIT")) {
                            return;
                        }
                    }
                } catch (IOException e) {
                    System.out.println("Player died: " + e);
                } finally {
                    try {socket.close();} catch (IOException e) {}
                }
            }
        }
    }
    The client
    import java.awt.Color;
    import java.awt.GridLayout;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    import java.io.BufferedReader;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.Socket;
     
    import javax.swing.Icon;
    import javax.swing.ImageIcon;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JOptionPane;
    import javax.swing.JPanel;
     
    public class TicTacToeClient {
     
        private JFrame frame = new JFrame("Tic Tac Toe");
        private JLabel messageLabel = new JLabel("");
        private ImageIcon icon;
        private ImageIcon opponentIcon;
     
        private Square[] board = new Square[9];
        private Square currentSquare;
     
        private static int PORT = 8901;
        private Socket socket;
        private BufferedReader in;
        private PrintWriter out;
     
        /**
         * Constructs the client by connecting to a server, laying out the
         * GUI and registering GUI listeners.
         */
        public TicTacToeClient(String serverAddress) throws Exception {
     
            // Setup networking
            socket = new Socket(serverAddress, PORT);
            in = new BufferedReader(new InputStreamReader(
                socket.getInputStream()));
            out = new PrintWriter(socket.getOutputStream(), true);
     
            // Layout GUI
            messageLabel.setBackground(Color.lightGray);
            frame.getContentPane().add(messageLabel, "South");
     
            JPanel boardPanel = new JPanel();
            boardPanel.setBackground(Color.black);
            boardPanel.setLayout(new GridLayout(3, 3, 2, 2));
            for (int i = 0; i < board.length; i++) {
                final int j = i;
                board[i] = new Square();
                board[i].addMouseListener(new MouseAdapter() {
                    public void mousePressed(MouseEvent e) {
                        currentSquare = board[j];
                        out.println("MOVE " + j);}});
                boardPanel.add(board[i]);
            }
            frame.getContentPane().add(boardPanel, "Center");
        }
     
    public void play() throws Exception {
            String response;
            try {
                response = in.readLine();
                if (response.startsWith("WELCOME")) {
                    char mark = response.charAt(8);
                    icon = new ImageIcon(mark == 'X' ? "x.gif" : "o.gif");
                    opponentIcon  = new ImageIcon(mark == 'X' ? "o.gif" : "x.gif");
                    frame.setTitle("Tic Tac Toe - Player " + mark);
                }
                while (true) {
                    response = in.readLine();
                    if (response.startsWith("VALID_MOVE")) {
                        messageLabel.setText("Valid move, please wait");
                        currentSquare.setIcon(icon);
                        currentSquare.repaint();
                    } else if (response.startsWith("OPPONENT_MOVED")) {
                        int loc = Integer.parseInt(response.substring(15));
                        board[loc].setIcon(opponentIcon);
                        board[loc].repaint();
                        messageLabel.setText("Opponent moved, your turn");
                    } else if (response.startsWith("VICTORY")) {
                        messageLabel.setText("You win");
                        break;
                    } else if (response.startsWith("DEFEAT")) {
                        messageLabel.setText("You lose");
                        break;
                    } else if (response.startsWith("TIE")) {
                        messageLabel.setText("You tied");
                        break;
                    } else if (response.startsWith("MESSAGE")) {
                        messageLabel.setText(response.substring(8));
                    }
                }
                out.println("QUIT");
            }
            finally {
                socket.close();
            }
        }
     
        private boolean wantsToPlayAgain() {
            int response = JOptionPane.showConfirmDialog(frame,
                "Want to play again?",
                "Tic Tac Toe is Fun Fun Fun",
                JOptionPane.YES_NO_OPTION);
            frame.dispose();
            return response == JOptionPane.YES_OPTION;
        }
     
        /**
         * Graphical square in the client window.  Each square is
         * a white panel containing.  A client calls setIcon() to fill
         * it with an Icon, presumably an X or O.
         */
        static class Square extends JPanel {
            JLabel label = new JLabel((Icon)null);
     
            public Square() {
                setBackground(Color.white);
                add(label);
            }
     
            public void setIcon(Icon icon) {
                label.setIcon(icon);
            }
        }
     
        /**
         * Runs the client as an application.
         */
        public static void main(String[] args) throws Exception {
            while (true) {
                String serverAddress = (args.length == 0) ? "localhost" : args[1];
                TicTacToeClient client = new TicTacToeClient(serverAddress);
                client.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                client.frame.setSize(240, 160);
                client.frame.setVisible(true);
                client.frame.setResizable(false);
                client.play();
                if (!client.wantsToPlayAgain()) {
                    break;
                }
            }
        }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: tic tac toe game problem with X and O

    The program works for me. I open server and two clients and click on the active client and it shows on both clients.
    Can you explain your problem?

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