Simple Tic-Tac-Toe (Java)

package tictactoe;
import java.util.InputMismatchException;
import java.util.Scanner;

public class Main {
    static boolean isGameRunning = true;

    public static void main(String[] args) {
        // write your code here
        Grid grid = new Grid();
        grid.fillGrid();
        grid.showGrid();
        while (isGameRunning) {
            grid.makeMove();
        }
    }
}

class Grid{

    public static final char EMPTY_CELL = ' ';
    public static final char O_CELL = 'O';
    public static final char X_CELL = 'X';
    public static int moveCounter = 0;
    static String input;

    private char[][] field = new char[3][3];
//    Scanner s = new Scanner(System.in);
    void fillGrid () {
        for (int i = 0; i < field.length; i++) {
            for (int j = 0; j < field[i].length; j++)
                field[i][j] = Grid.EMPTY_CELL;
        }
    }

    public void makeMove () {
        Scanner s = new Scanner(System.in);
        try {
            int x = s.nextInt();
                int y = s.nextInt();
                x--;
                y--;
                if (EMPTY_CELL == field[x][y] && moveCounter % 2 == 0) {
                    field[x][y] = Grid.X_CELL;
                    showGrid();
                    moveCounter++;
                    checkGameState();
                } else if (EMPTY_CELL == field[x][y] && moveCounter % 2 != 0) {
                    field[x][y] = Grid.O_CELL;
                    showGrid();
                    moveCounter++;
                    checkGameState();
                } else if (EMPTY_CELL != field[x][y]) {
                    System.out.println("This cell is occupied! Choose another one!");
                }
            } catch (InputMismatchException e) {
                System.out.println("You should enter numbers!");
            } catch (IndexOutOfBoundsException e) {
                System.out.println("Coordinates should be from 1 to 3!");
            }
    }

    void showGrid () {
        System.out.print("---------\n" +
                         "| " + field[0][0] + " " + field[0][1] + " " + field[0][2] + " |\n" +
                         "| " + field[1][0] + " " + field[1][1] + " " + field[1][2] + " |\n" +
                         "| " + field[2][0] + " " + field[2][1] + " " + field[2][2] + " |\n" +
                         "---------\n");
    }


    private boolean isPlayerWin (char player) {
        return (field[0][0] == player && field[1][1] == player && field[2][2] == player) ||
                ((field[0][2] == player && field[1][1] == player && field[2][0] == player) ||

            (field[0][0] == player && field[1][0] == player && field[2][0] == player) ||
            (field[0][1] == player && field[1][1] == player && field[2][1] == player) ||
            (field[0][2] == player && field[1][2] == player && field[2][2] == player) ||

            (field[0][0] == player && field[0][1] == player && field[0][2] == player) ||
            (field[1][0] == player && field[1][1] == player && field[1][2] == player) ||
            (field[2][0] == player && field[2][1] == player && field[2][2] == player));
    }


    public void checkGameState() {

        int xCnt = 0;
        int oCnt = 0;

        for (int i = 0; i < field.length; i++) {
            for (int j = 0; j < field[i].length; j++) {
                if (field[i][j] == X_CELL) {
                    xCnt++;
                } else if (field[i][j] == Grid.O_CELL) {
                    oCnt++;
                }
            }
        }
        int moveCnt = xCnt + oCnt;
        boolean isImpossQntDiff = xCnt > oCnt + 1 || xCnt < oCnt - 1 || oCnt > xCnt + 1 || oCnt < xCnt - 1;

        char player = (moveCounter - 1) % 2 == 0 ? 'X' : 'O';
        for (;;) {
            if (isPlayerWin(player)) {
                System.out.println(player + " wins");
                Main.isGameRunning = false;
                return;
            } else if (isPlayerWin(player) || isImpossQntDiff) {
                System.out.println("Impossible");
                return;
            } else if (9 == moveCnt){
                System.out.println("Draw");
                Main.isGameRunning = false;
                return;
            } else {
                return;
            }
        }
    }
}
//    public void gameStartInput () {
//        final Scanner s = new Scanner(System.in);
//        Grid.input = s.nextLine().replaceAll("_", " ");
//        int counter = 0;
//        for (int i = 0; i < field.length; i++) {
//            for (int j = 0; j < field[i].length; j++) {
//                field[i][j] = Grid.input.charAt(counter);
//                counter++;
//            }
//        }
//        showGrid();
//        checkGameState();
//    }