Tic-Tac-Toe Game in Java

import java.util.Random;
import java.util.Scanner;

public class TicTacToe {
    private static char[][] board = new char[3][3];
    private static char currentPlayer = 'X';

    public static void main(String[] args) {
        initializeBoard();
        printBoard();
        playGame();
    }

    private static void initializeBoard() {
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                board[i][j] = ' ';
            }
        }
    }

    private static void printBoard() {
        System.out.println("  1 2 3");
        for (int i = 0; i < 3; i++) {
            System.out.print(i + 1 + " ");
            for (int j = 0; j < 3; j++) {
                System.out.print(board[i][j]);
                if (j < 2) {
                    System.out.print("|");
                }
            }
            System.out.println();
            if (i < 2) {
                System.out.println("  -+-+-");
            }
        }
    }

    private static void playGame() {
        Scanner scanner = new Scanner(System.in);
        Random random = new Random();
        int row, col;

        while (true) {
            if (currentPlayer == 'X') {
                do {
                    System.out.println("Player " + currentPlayer + ", enter row and column (e.g., 1 2): ");
                    row = scanner.nextInt() - 1; // Adjust for 1-based indexing
                    col = scanner.nextInt() - 1;
                } while (!isValidMove(row, col));
            } else {
                System.out.println("Computer's turn (Player " + currentPlayer + ")...");
                do {
                    row = random.nextInt(3); // Random computer move
                    col = random.nextInt(3);
                } while (!isValidMove(row, col));
            }

            board[row][col] = currentPlayer;
            printBoard();

            if (checkWin()) {
                System.out.println("Player " + currentPlayer + " wins!");
                break;
            } else if (isBoardFull()) {
                System.out.println("It's a draw!");
                break;
            }

            // Switch to the other player
            currentPlayer = (currentPlayer == 'X') ? 'O' : 'X';
        }

        scanner.close();
    }

    private static boolean isValidMove(int row, int col) {
        return row >= 0 && row < 3 && col >= 0 && col < 3 && board[row][col] == ' ';
    }

    private static boolean checkWin() {
        // Check rows, columns, and diagonals for a win
        return checkRows() || checkColumns() || checkDiagonals();
    }

    private static boolean checkRows() {
        for (int i = 0; i < 3; i++) {
            if (board[i][0] == currentPlayer && board[i][1] == currentPlayer && board[i][2] == currentPlayer) {
                return true;
            }
        }
        return false;
    }

    private static boolean checkColumns() {
        for (int i = 0; i < 3; i++) {
            if (board[0][i] == currentPlayer && board[1][i] == currentPlayer && board[2][i] == currentPlayer) {
                return true;
            }
        }
        return false;
    }

    private static boolean checkDiagonals() {
        return (board[0][0] == currentPlayer && board[1][1] == currentPlayer && board[2][2] == currentPlayer) ||
                (board[0][2] == currentPlayer && board[1][1] == currentPlayer && board[2][0] == currentPlayer);
    }

    private static boolean isBoardFull() {
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                if (board[i][j] == ' ') {
                    return false;
                }
            }
        }
        return true;
    }
}

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