gistfile1.txt

import java.util.Scanner;

public class BoardMatrix {

	static char[][] matrix = new char[3][3];
	
	public static void main(String[] args) {
		BoardMatrix.assignMatrix();
		
		boolean gameOver = false;
		Scanner scanner = new Scanner(System.in);
		while (!gameOver) {
			System.out.println("What's your move X?");
			int row = scanner.nextInt();
			int col = scanner.nextInt();
			placeMark(row, col, 'X');
			
			printMatrix();
			
			if (detectWinner('X')) {
				gameOver = true;
				System.out.println("Congrats X!");
				continue;
			} 
			
			System.out.println("What's your move O?");
			row = scanner.nextInt();
			col = scanner.nextInt();
			placeMark(row, col, 'O');
			
			printMatrix();
			
			if (detectWinner('O')) {
				gameOver = true;
				System.out.println("Congrats O!");
				continue;
			} 
		}
	}
	
	public static boolean detectWinner(char player) {
		// check for a row all the same
		for (char[] row : matrix) {
			int matches = 0;
			for (char c : row) {
				if (c == player)
					matches++;
			}
			
			if (matches == 3) return true;
		}
		
		// check for a column all the same
		for (int col = 0; col < 3; col++) {
			int count = 0;
			for (char[] row : matrix)
				if (row[col] == player)
					count++;
			
			if (count == 3) return true;
		}
		
		// left diagonal
		int count = 0;
		for (int rowCol = 0; rowCol < 3; rowCol++) {
			if (matrix[rowCol][rowCol] == player)
				count++;
		}
		
		if (count == 3) return true;
		
		// right diagonal
		for (int row = 0; row < 3; row++) {
			int matches = 0;
			int col = 2 - row; 
			if (matrix[row][col] == player)
				matches++;
			
			if (matches == 3) return true;
		}
		
		// must not be a winner
		return false;
	}
	
	public static boolean isOccupied(int row, int col) {
		return matrix[row][col] != '-';
	}
	
	public static void placeMark(int row, int col, char who){
		if (!isOccupied(row, col))
			matrix[row][col] = who;
	}
	
	//====================================================
	//Create a  3 X 3 matrix
	public static void assignMatrix()
	{
		for (int r=0; r<matrix.length; r++){
			for(int c=0; c<matrix[0].length; c++){
				matrix[r][c]='-';
			}
		}
	}
	//===========================================		
	//Printing a  3 X 3 matrix
	public static void printMatrix()
	{
		for (int r=0; r<matrix.length; r++){
			for(int c=0; c<matrix[0].length; c++){
				System.out.print(matrix[r][c]+" ");
			}
			System.out.println();
		}
	}

}