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Goals for ProjectGoals 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?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 ToolkitJ2ME 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 ClassesTic 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’dTic 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
Communication SchemeCommunication 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 SchemeCommunication 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
TicTacToeCanvasTicTacToeCanvas 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