J2ME: Tic Tac Toe By Jud Porter and John Tat

Goals for Project  Design and implement multiplayer game  Network connectivity between mobile devices  Keep scoring for the game  Implement a cursor to select positions  Design and implement multiplayer game  Network connectivity between mobile devices  Keep scoring for the game  Implement a cursor to select positions

Why Tic Tac Toe?  Simple game to implement  Framework can be used to implement more complex game  Designed and implemented in J2ME  Java Micro Edition  Wireless Toolkit 2.2  Generic toolkit instead of vendor specific  Better chance of working on a variety of devices  Simple game to implement  Framework can be used to implement more complex game  Designed and implemented in J2ME  Java Micro Edition  Wireless Toolkit 2.2  Generic toolkit instead of vendor specific  Better chance of working on a variety of devices

J2ME and Wireless Toolkit  Device that program is implemented on must be specified  Device implements profile  Profiles are built upon configuration  MIDP 2.0  Mobile Information Device Profile 2.0  CLDC 1.1  Connection Limited Device Configuration 1.1  Device that program is implemented on must be specified  Device implements profile  Profiles are built upon configuration  MIDP 2.0  Mobile Information Device Profile 2.0  CLDC 1.1  Connection Limited Device Configuration 1.1

Tic Tac Toe Classes  TacTacToeMidlet  First class that runs  Allows the user to select between Client and Server  Creates a new instance of Client or Server depending on choice  TicTacToeCanvas  Drawing of the board  Key Pressed  Check for winner  Keeps track of scores  Updates opponents pieces  TacTacToeMidlet  First class that runs  Allows the user to select between Client and Server  Creates a new instance of Client or Server depending on choice  TicTacToeCanvas  Drawing of the board  Key Pressed  Check for winner  Keeps track of scores  Updates opponents pieces

Tic Tac Toe Classes Cont’d  TicTacToeServer  Creates instance of TicTacToeCanvas class  Communication scheme with client  First to move  Sends an integer to client of grid selection  Waits to receive integer for client of grid selection  TicTacToeClient  Creates instance of TicTacToeCanvas class  Communication scheme with server  Wait for server to move  receives the integer and places a piece accordingly onto the board  TicTacToeServer  Creates instance of TicTacToeCanvas class  Communication scheme with client  First to move  Sends an integer to client of grid selection  Waits to receive integer for client of grid selection  TicTacToeClient  Creates instance of TicTacToeCanvas class  Communication scheme with server  Wait for server to move  receives the integer and places a piece accordingly onto the board

Game Structure

Communication Scheme  Bluetooth  Protocol too difficult for scope of this project  Could not get simple application to work  Other Protocols: Datagram, Socket, COMM  Moved onto Socket Protocol  Endpoint for communication of two devices  Socket connection on port localhost 5000  InputStream and OutputStream are opened when server discovers the client or client finds server  Two way communication scheme  Bluetooth  Protocol too difficult for scope of this project  Could not get simple application to work  Other Protocols: Datagram, Socket, COMM  Moved onto Socket Protocol  Endpoint for communication of two devices  Socket connection on port localhost 5000  InputStream and OutputStream are opened when server discovers the client or client finds server  Two way communication scheme

Communication Scheme  Server has first move  Client waits for server to move  On move (when Fire key is pressed) location of move encoded as integer is sent to other device  On receipt of location, other client now has control of board to send next move  Server has first move  Client waits for server to move  On move (when Fire key is pressed) location of move encoded as integer is sent to other device  On receipt of location, other client now has control of board to send next move

TicTacToeCanvas  Paint  Draws board  Draws pieces  Draws cursor  SetPiece  Stores client/server moves  Change turns  keyPressed  Moves the cursor on the screen  Selects the board position and sends it to the client/server  CheckWinner  Checks for a winner  Reset  Resets the board for both client and server  Paint  Draws board  Draws pieces  Draws cursor  SetPiece  Stores client/server moves  Change turns  keyPressed  Moves the cursor on the screen  Selects the board position and sends it to the client/server  CheckWinner  Checks for a winner  Reset  Resets the board for both client and server

Server/Client Screenshots

Game Screenshots

Winner Screenshots