This assignment tests your understanding on GUI, Java Socket Programming and the application of multi-threading.

In this assignment, you are going to implement a two-player Tic-Tac-Toe Game. The game would only start when the Tic-Tac-Toe Server runs and two players are connected to the server. When the game starts, players need to input their player’s name first (i.e. the player cannot make any move if he/she does not enter his/her player’s name) (Fig. 1). Players are not allowed to re-input their names again once they have submitted their names (i.e. the textboxes and the submit buttons should be disabled). In addition, their names should be displayed in the frame’s title (i.e. change from Tic Tac Toe to Tic Tac Toe-Player: (player’s name)) and the message title (located below the menu bar) should change from “Enter your player name…” to “WELCOME (player’s name)” (Fig. 2).
Initial setting:

Fig. 1
After player enters his/her name:

Fig. 2
After entering the player’s name, the game would always be started by player 1 (the player’s mark with a “x”)’s first move (i.e. player 2 (the player’s mark with a “o”) cannot make his/her first move until player 1 makes his/her first move). If player 1’s move is valid, his/her move would be marked as a “x” on the 3 x 3 board (The mark “x” on the 3 x 3 board should be displayed on both player 1’s and player 2’s board). The message title in the player 1’s board would be changed to “Valid move, wait for your opponent.” while the message title in the player 2’s board would be changed to “ Your opponent has moved, now is your turn.”. Besides, player 1 is not allowed to make the next move until his/her opponent moves (i.e. if player 1 makes the next move before his/her opponent moves, it would be considered as an invalid move and nothing wou be displayed on the board). The turn would be switched to the opponent (this time player 2) and if player 2’s move is valid, it would be mark as a “o” on the 3 x 3 board on both players. The message displayed in the message title of the player 2’s board would be changed to “Valid move, wait for your opponent.” while the message title of the player 1’s board would be changed to “ Your opponent has moved, now is your turn.” Similarly, the turn would be switched to player 1 again and player 2 cannot make his/her next move until player 1 makes the move (Fig. 3 & 4).

Fig. 3

Fig. 4
Criteria for a valid move:

- The move is not occupied by any mark.

- The move is made in the player’s turn.

- The move is made within the 3 x 3 board.

- Player 1 wins.
- Player 2 wins.
- Draw

Fig. 5

Fig. 6

Fig. 7
In addition to the above, you also need to handle the case when one of the players left during the game process. In this case, the game would terminate immediately (i.e. the remaining player cannot make further move), a Message Dialog “Game Ends. One of the players left.” would be displayed on the remaining player, as shown below in Fig.8.

Fig. 8
Besides, as you can see in the screen captures, there is a JMenuBar which consists of 2 JMenu, named Control and Help (located above the message title). In the JMenu of Control, it consists of a JMenuItem, named Exit while in the JMenu of Help, it consists of a JMenuItem, named Instruction (Fig. 9 & 10). When the player clicks “Exit”, he/she would exit from the game and the game would be terminated immediately. When the player clicks “Instruction”, a Dialog Frame consists of some game information would be displayed (Fig. 11).

Fig. 9 Fig. 10

Fig. 11
Important notes for the assignment:
1. In this assignment, you can assume both the server program and the client programs run on local host (i.e. with IP address 127.0.0.1).

2. You can have your own design but you must include the GUI components as shown in the above screen captures and all the functionalities described in this document should be implemented. To ensure your program has implemented all necessary functions, please refer to the marking scheme below as for your references.

3. This assignment will be marked by features (Your code would not be investigated). You are required to write JavaDoc for all non-private classes and non-private class member functions. Programs without JavaDoc will lead to mark deduction. However, you don’t need to generate JavaDoc htmls. Just write comment blocks in your source program.

4. You are required to include a readme.txt file which clearly describes how to start and run your program. If you do not include a readme.txt file to describe how to start and run your program, your assignment will NOT be marked. If following the instructions written in the readme.txt file still lead to failure to start and run your program, your assignment will also NOT be marked.

5. Please submit all files in a single compressed file (in .zip or .7z) to Moodle. Late submission is NOT allowed. Do NOT submit .class files.
Marking Scheme: