private void resetLabels() {
        for (JLabel label : labels) {
            //label.setBorder(BorderFactory.createLineBorder(Color.white));
            label.setFont(new java.awt.Font("Tahoma", 0, FONT_SIZE));
            label.setMaximumSize(LABEL_SIZE);
            label.setMinimumSize(LABEL_SIZE);
            label.setPreferredSize(LABEL_SIZE);
        }
    }