TicTacToe.java

import java.util.Scanner;

public class TicTacToe {
    static char[][] board = {
            {'1', '2', '3'},
            {'4', '5', '6'},
            {'7', '8', '9'}
    };

    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        char playAgain;

        do {
            resetBoard();
            playGame();

            System.out.print("\nDo you want to play again? (Y/N): ");
            playAgain = sc.next().charAt(0);

        } while (playAgain == 'Y' || playAgain == 'y');

        System.out.println("Thanks for playing!");
        sc.close();
    }

    static void playGame() {
        char currentPlayer = 'X';
        int moves = 0;

        while (true) {
            printBoard();

            System.out.print("Player " + currentPlayer + ", enter your move (1-9): ");
            int move = sc.nextInt();

            if (placeMove(move, currentPlayer)) {
                moves++;

                if (checkWinner(currentPlayer)) {
                    printBoard();
                    System.out.println("Player " + currentPlayer + " wins!");
                    break;
                }

                if (moves == 9) {
                    printBoard();
                    System.out.println("It's a draw!");
                    break;
                }

                currentPlayer = (currentPlayer == 'X') ? 'O' : 'X';
            } else {
                System.out.println("Invalid move! Try again.");
            }
        }
    }

    static void printBoard() {
        System.out.println();
        System.out.println(board[0][0] + " | " + board[0][1] + " | " + board[0][2]);
        System.out.println("--+---+--");
        System.out.println(board[1][0] + " | " + board[1][1] + " | " + board[1][2]);
        System.out.println("--+---+--");
        System.out.println(board[2][0] + " | " + board[2][1] + " | " + board[2][2]);
        System.out.println();
    }

    static boolean placeMove(int move, char player) {
        int row = (move - 1) / 3;
        int col = (move - 1) % 3;

        if (move >= 1 && move <= 9 && board[row][col] != 'X' && board[row][col] != 'O') {
            board[row][col] = player;
            return true;
        }

        return false;
    }

    static boolean checkWinner(char player) {

        // Rows
        for (int i = 0; i < 3; i++) {
            if (board[i][0] == player && board[i][1] == player && board[i][2] == player)
                return true;
        }

        // Columns
        for (int i = 0; i < 3; i++) {
            if (board[0][i] == player && board[1][i] == player && board[2][i] == player)
                return true;
        }

        // Diagonals
        if (board[0][0] == player && board[1][1] == player && board[2][2] == player)
            return true;

        if (board[0][2] == player && board[1][1] == player && board[2][0] == player)
            return true;

        return false;
    }

    static void resetBoard() {
        char count = '1';

        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                board[i][j] = count++;
            }
        }
    }
}