/** Deals with the incorrect array */
    private void tegnBrett() {
        bokser = new JPanel[(str/boksX) * (str/boksY)];
        ruter = new JTextField[str * str];

        int ctr = 0;

        for (int i = 0; i < bokser.length; i++) {
            bokser[i] = new JPanel();
            bokser[i].setLayout(new GridLayout(boksX, boksY));
            bokser[i].setBorder(BorderFactory.createEmptyBorder(2,2,2,2));
            sudokuBrett.add(bokser[i]);

            for (int j = ctr; j < ruter.length; j++) {
                ruter[j] = new JTextField(1);
                ruter[j].setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
                ruter[j].setHorizontalAlignment(JTextField.CENTER);
                ruter[j].setFont(new Font("sans serif", Font.BOLD, 20));

                bokser[i].add(ruter[j]);
                ctr++;

                if (ctr % (boksX * boksY) == 0) {
                    break;
                }
            }
        }
    }

/** Reads data from file and inputs wrongly into the incorrect array */
    private void tolkFil(File f) {
        minIO io = new minIO();
        String[] brettInfo = null;

        // Leser filinnhold inn i array.
        brettInfo = io.lesFil(f).split(System.getProperty("line.separator"));

        // henter størrelser.
        str = Integer.parseInt(brettInfo[0]);
        boksX = Integer.parseInt(brettInfo[1]);
        boksY = Integer.parseInt(brettInfo[2]);
        int[][] brettData = new int[str][str];
        char[] guiData = new char[str*str];

        // hent data fra selve brettet.
        int ctr = 0;
        for (int x = 0; x < brettInfo.length - 3; x++) {
            char[] r = brettInfo[x + 3].toCharArray();

            for (int y = 0; y < r.length; y++) {
                // sørger for at vi får riktige tall inn.
                if (r[y] == '.') brettData[x][y] = 0;
                else if ((int) r[y] - '0' < 10) brettData[x][y] = (int) r[y] - '0';
                else if (r[y] == '@') brettData[x][y] = 36;
                else brettData[x][y] = (int) r[y] - 55;

                // leser det samme inn i array for GUI.
                guiData[ctr] = r[y];
                ctr++;
            }
        }

        for (int i = 0; i < ruter.length; i++) {
            if (guiData[i] != '.')
                ruter[i].setText("" + guiData[i]);
        }
    }