TicTacToe.java

// name: TicTacToe
// date: Friday, September 18th, 2015
// desc: CLI TicTacToe game

import java.util.Scanner;

public class TicTacToe {
	
	public static char[][] board;
	
	public static void main(String[] args) {
		board = new char[3][3];
		for(int i = 0; i < board.length; i++) {
			for(int j = 0; j < board[i].length; j++) {
				board[i][j] = '-';
			}
		}
		
		// the game loop
		Scanner s = new Scanner(System.in);
		boolean inGame = true;
		boolean turn = false;
		
		while(inGame) {
			printBoard();
			
			int x = 0;
			int y = 0;				
			do {
				System.out.print("X: ");
				x = s.nextInt() - 1;
				System.out.print("Y: ");
				y = s.nextInt() - 1;
			} while(x >= board.length || y >= board.length || board[y][x] != '-');
			
			if(turn) {
				turn = false;
				board[y][x] = 'x';
			} else {
				turn = true;	
				board[y][x] = 'o';
			}		      
			
			if(checkWinner() != '-') {
				printBoard();
				
				System.out.print("Winner is: " + checkWinner());
				inGame = false;
			}
		}
		
		s.close();
	}
	
	public static void printBoard() {
		for(int i = 0; i < board.length; i++) {
			for(int j = 0; j < board[i].length; j++) {
				System.out.print(board[i][j]);
			}
			System.out.print("\n");
		}
	}
		
    public static char checkWinner() {
		if((board[0][0] == board[0][1]) && (board[0][1] == board[0][2]))
		    return board[0][0];
		if((board[1][0] == board[1][1]) && (board[1][1] == board[1][2]))
		    return board[1][0];
		if((board[2][0] == board[2][1]) && (board[2][1] == board[2][2]))
		    return board[2][0];
		if((board[0][0] == board[1][0]) && (board[1][0] == board[2][0]))
		    return board[0][0];
		if((board[0][1] == board[1][1]) && (board[1][1] == board[2][1]))
		    return board[0][1];
		if((board[0][2] == board[1][2]) && (board[1][2] == board[2][2]))
		    return board[0][2];
		if((board[0][0] == board[1][1]) && (board[1][1] == board[2][2]))
		    return board[0][0];
		if((board[0][2] == board[1][1]) && (board[1][1] == board[2][0]))
		    return board[0][2];
	
		return '-';
    }
	
}