I have to create a PDF file from a HTML source. Currently, I'm coping with problem concerning special (polish) characters in the output file, precisely with their lack.

HTML source: 

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<table width="100%" border="0.5" align="center" cellpadding="0" style="border-collapse:collapse; border:1px solid black; font-family:Arial, Helvetica, sans-serif; font-size:16px">
  <tr>
    <td align="center" ><b>Test: ąęłóćńśŁÓŃĆŻŹąśżźłęó</b></td>
  </tr>
</table>

Java source:

Document document = new Document(PageSize.A4, 38, 38, 50, 38);  
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("iTextExample.pdf"));  
document.open();  
HTMLWorker htmlWorker = new HTMLWorker(document);  
htmlWorker.parse(new StringReader(readFileAsString("index.html")));  
document.close();


public static String readFileAsString(String filePath) throws IOException {
    DataInputStream dis = new DataInputStream(new FileInputStream(filePath));
    try {
        long len = new File(filePath).length();
        if (len > Integer.MAX_VALUE) {
            throw new IOException("File " + filePath + " too large, was " + len + " bytes.");
        }
        byte[] bytes = new byte[(int) len];
        dis.readFully(bytes);
        return new String(bytes, "UTF-8");
    } finally {
        dis.close();
    }
}

My question is: how to change default font (Helvetica) to eg. Arial Bold in whole PDF document?

I've tested many examples connected with StyleSheet and none of them worked. I have to change a default font, because there's no polish characters - that's the solution I hope is going to work.

Edit: 

class defaultFontProvider extends Fon
java html character-encoding itext
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