Не компилируется

public class MinesweeperGame extends Game {
    private static final int SIDE = 9;
    private GameObject[][] gameField = new GameObject[SIDE][SIDE];
    private int countMinesOnField;

    private void createGame() {
        for (int x = 0; x < SIDE; x++) {
            for (int y = 0; y < SIDE; y++) {
                if (getRandomNumber(10) == 5) {
                    gameField[x][y] = new GameObject(y, x, true);
                    setCellColor(x, y, Color.ORANGE);
                    countMinesOnField++;
                } else {
                    gameField[x][y] = new GameObject(y, x, false);
                    setCellColor(x, y, Color.ORANGE);
                }
            }

        }
    }

    @Override
    public void initialize() {

        setScreenSize(SIDE, SIDE);
        createGame();
    }