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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. Why Tic Tac Toe?. Simple game to implement

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j2me tic tac toe

J2ME: Tic Tac Toe

By Jud Porter and John Tat

goals for project
Goals for Project
  • 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
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
j2me and wireless toolkit
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
tic tac toe classes
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
tic tac toe classes cont d
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
communication scheme
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 scheme9
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
tictactoecanvas
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
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