@Override
    public Class<?> getColumnClass(int columnIndex) {
        switch (columnIndex) {
            case 0 :
                return Integer.class;
            case 1 :
                return String.class;
            case 2 :
                return String.class;
            case 3 :
                return String.class;
            case 4 :
                return Integer.class;
            case 5 :
                return String.class;
            default:
                return Object.class;
        }
    }