3: Tic-Tac-Toe [40 marks Implement the game of Tic-Tac-Toe. Your game must consi

Question

3: Tic-Tac-Toe [40 marks Implement the game of Tic-Tac-Toe. Your game must consist of at least three (3) classes: Board, Player, and TicTacToeApp. You can add more classes if you wish . The TicTacToeApp program will run the game, using a Board object and two Player objects. . The Player class will implement a player in the game. A player could be a human user (and so user input will be needed) or a computer. . The Board class will be the board in the game. It can either be a 3x3 grid or a 5x5 grid. The constructor of the class will create an appropriate grid . User input for specifying which grid element in the board will be a comma separated list of two numbers, where the first number is row (starting at 0) and the second number is the column (starting at 0). The amount of whitespace around the numbers (and comma) can be arbitrary. . A single command line argument (for the TicTacToeApp program) will specify if the game is a 3x3 or 5x5 grid. Acceptable command line arguments will be "3", "5", "three" and "five". For any other command line argument (or lack) your program will terminate with a usage message (of how to run the program properly . The game board must be displayed before any player makes a move The game should be easy to play. Note: Style for this problem includes class design. Encapsulation is required Mark breakdown: 15 marks for Style, 25 marks for Correctness Put vour Board. java, TicTacToeApp. java, Player. iava and any other java files you created in your assignment2.zip file.

Explanation / Answer

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class TicTacToe
extends JFrame
{
   public static void main(String [] args)
   {
       new TicTacToe();
   }

   private JButton btnA1, btnA2, btnA3, btnB1, btnB2, btnB3, btnC1, btnC2, btnC3;

   private TicTacToeBoard board;

   public TicTacToe()
   {
       // Set up the grid
       this.setSize(300,300);
   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   this.setTitle("Tic-Tac-Toe");
       JPanel panel1 = new JPanel();
   panel1.setSize(300,300);
   panel1.setLayout(new GridLayout(3,3));
   btnA1 = createButton("A1");
   btnA2 = createButton("A2");
   btnA3 = createButton("A3");
   btnB1 = createButton("B1");
   btnB2 = createButton("B2");
   btnB3 = createButton("B3");
   btnC1 = createButton("C1");
   btnC2 = createButton("C2");
   btnC3 = createButton("C3");
       panel1.add(btnA1);
       panel1.add(btnA2);
       panel1.add(btnA3);
       panel1.add(btnB1);
       panel1.add(btnB2);
       panel1.add(btnB3);
       panel1.add(btnC1);
       panel1.add(btnC2);
       panel1.add(btnC3);
   this.add(panel1);
   this.setVisible(true);

       // Start the game
       board = new TicTacToeBoard();

   }

   private JButton createButton(String square)
   {
       JButton btn = new JButton();
       btn.setPreferredSize(new Dimension(50, 50));
       Font f = new Font("Dialog", Font.PLAIN, 72);
       btn.setFont(f);
       btn.addActionListener(e -> btnClick(e, square));
       return btn;
   }

   private void btnClick(ActionEvent e, String square)
   {
       if (board.getSquare(square) != 0)
           return;

       JButton btn = (JButton)e.getSource();
       btn.setText("X");

       board.playAt(square, 1);

       if (board.isGameOver() == 3)
       {
           JOptionPane.showMessageDialog(null,
               "It's a draw!", "Game Over",
               JOptionPane.INFORMATION_MESSAGE);
           resetGame();
           return;
       }

       if (board.isGameOver() == 1)
       {
           JOptionPane.showMessageDialog(null,
               "You beat me!", "Game Over",
               JOptionPane.INFORMATION_MESSAGE);
           resetGame();
           return;
       }

       String computerMove = board.getNextMove();
       board.playAt(computerMove,2);

       switch (computerMove)
       {
           case "A1":
               btnA1.setText("O");
               break;
           case "A2":
               btnA2.setText("O");
               break;
           case "A3":
               btnA3.setText("O");
               break;
           case "B1":
               btnB1.setText("O");
               break;
           case "B2":
               btnB2.setText("O");
               break;
           case "B3":
               btnB3.setText("O");
               break;
           case "C1":
               btnC1.setText("O");
               break;
           case "C2":
               btnC2.setText("O");
               break;
           case "C3":
               btnC3.setText("O");
               break;
       }

       if (board.isGameOver() == 2)
       {
           JOptionPane.showMessageDialog(null,
               "I beat you!", "Game Over",
               JOptionPane.INFORMATION_MESSAGE);
           resetGame();
           return;
       }
   }

   private void resetGame()
   {
       board.reset();
       btnA1.setText("");
       btnA2.setText("");
       btnA3.setText("");
       btnB1.setText("");
       btnB2.setText("");
       btnB3.setText("");
       btnC1.setText("");
       btnC2.setText("");
       btnC3.setText("");
   }
}

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