private Class getNFontClass(int fontType) throws ClassNotFoundException {
        Class fontClass = null;
        if (FONT_OPEN_TYPE == fontType) {
            fontClass = Class.forName(NFONT_OPEN_TYPE);
        } else if (FONT_TRUE_TYPE == fontType) {
            fontClass = Class.forName(NFONT_TRUE_TYPE);
        } else if (FONT_TYPE_0 == fontType) {
            fontClass = Class.forName(NFONT_TRUE_TYPE_0);
        } else if (FONT_TYPE_1 == fontType) {
            fontClass = Class.forName(NFONT_TRUE_TYPE_1);
        } else if (FONT_TYPE_3 == fontType) {
            fontClass = Class.forName(NFONT_TRUE_TYPE_3);
        }
        return fontClass;
    }