PdfAppearance() 
{
     
        stdFieldFontNames.put("Courier-BoldOblique", new PdfName("CoBO"));
        stdFieldFontNames.put("Courier-Bold", new PdfName("CoBo"));
        stdFieldFontNames.put("Courier-Oblique", new PdfName("CoOb"));
        stdFieldFontNames.put("Courier", new PdfName("Cour"));
        stdFieldFontNames.put("Helvetica-BoldOblique", new PdfName("HeBO"));
        stdFieldFontNames.put("Helvetica-Bold", new PdfName("HeBo"));
        stdFieldFontNames.put("Helvetica-Oblique", new PdfName("HeOb"));
        stdFieldFontNames.put("Helvetica", PdfName.HELV);
        stdFieldFontNames.put("Symbol", new PdfName("Symb"));
        stdFieldFontNames.put("Times-BoldItalic", new PdfName("TiBI"));
        stdFieldFontNames.put("Times-Bold", new PdfName("TiBo"));
        stdFieldFontNames.put("Times-Italic", new PdfName("TiIt"));
        stdFieldFontNames.put("Times-Roman", new PdfName("TiRo"));
        stdFieldFontNames.put("ZapfDingbats", PdfName.ZADB);
        stdFieldFontNames.put("HYSMyeongJo-Medium", new PdfName("HySm"));
        stdFieldFontNames.put("HYGoThic-Medium", new PdfName("HyGo"));
        stdFieldFontNames.put("HeiseiKakuGo-W5", new PdfName("KaGo"));
        stdFieldFontNames.put("HeiseiMin-W3", new PdfName("KaMi"));
        stdFieldFontNames.put("MHei-Medium", new PdfName("MHei"));
        stdFieldFontNames.put("MSung-Light", new PdfName("MSun"));
        stdFieldFontNames.put("STSong-Light", new PdfName("STSo"));
        stdFieldFontNames.put("MSungStd-Light", new PdfName("MSun"));
        stdFieldFontNames.put("STSongStd-Light", new PdfName("STSo"));
        stdFieldFontNames.put("HYSMyeongJoStd-Medium", new PdfName("HySm"));
        stdFieldFontNames.put("KozMinPro-Regular", new PdfName("KaMi"));
        super();
        separator = ' ";
}

Creates a PdfAppearance.

 PdfAppearance(PdfIndirectReference iref) 
{
        thisReference = iref;
}

 PdfAppearance(PdfWriter wr) 
{
        super(wr);
        separator = ' ";
}

Creates new PdfTemplate

Parameters:

wr - the PdfWriter

 public static PdfAppearance createAppearance(PdfWriter writer,
    float width,
    float height) 
{
        return createAppearance(writer, width, height, null);
}

Creates a new appearance to be used with form fields.

 static PdfAppearance createAppearance(PdfWriter writer,
    float width,
    float height,
    PdfName forcedName) 
{
        PdfAppearance template = new PdfAppearance(writer);
        template.setWidth(width);
        template.setHeight(height);
        writer.addDirectTemplateSimple(template, forcedName);
        return template;
}

 public PdfContentByte getDuplicate() 
{
        PdfAppearance tpl = new PdfAppearance();
        tpl.writer = writer;
        tpl.pdf = pdf;
        tpl.thisReference = thisReference;
        tpl.pageResources = pageResources;
        tpl.bBox = new Rectangle(bBox);
        tpl.group = group;
        tpl.layer = layer;
        if (matrix != null) {
            tpl.matrix = new PdfArray(matrix);
        }
        tpl.separator = separator;
        return tpl;
}

 public  void setFontAndSize(BaseFont bf,
    float size) 
{
        checkWriter();
        state.size = size;
        if (bf.getFontType() == BaseFont.FONT_TYPE_DOCUMENT) {
            state.fontDetails = new FontDetails(null, ((DocumentFont)bf).getIndirectReference(), bf);
        }
        else
            state.fontDetails = writer.addSimple(bf);
        PdfName psn = (PdfName)stdFieldFontNames.get(bf.getPostscriptFontName());
        if (psn == null) {
            if (bf.isSubset() && bf.getFontType() == BaseFont.FONT_TYPE_TTUNI)
                psn = state.fontDetails.getFontName();
            else {
                psn = new PdfName(bf.getPostscriptFontName());
                state.fontDetails.setSubset(false);
            }
        }
        PageResources prs = getPageResources();
//        PdfName name = state.fontDetails.getFontName();
        prs.addFont(psn, state.fontDetails.getIndirectReference());
        content.append(psn.getBytes()).append(' ").append(size).append(" Tf").append_i(separator);
}

Set the font and the size for the subsequent text writing.