Java: How to convert RTF into HTML

I came up with the following solution of converting a RTF text into HTML format without dealing with third party libraries (which usually not free):

	public static String rtfToHtml(Reader rtf) throws IOException {
		JEditorPane p = new JEditorPane();
		p.setContentType("text/rtf");
		EditorKit kitRtf = p.getEditorKitForContentType("text/rtf");
		try {
			kitRtf.read(rtf, p.getDocument(), 0);
			kitRtf = null;
			EditorKit kitHtml = p.getEditorKitForContentType("text/html");
			Writer writer = new StringWriter();
			kitHtml.write(writer, p.getDocument(), 0, p.getDocument().getLength());
			return writer.toString();
		} catch (BadLocationException e) {
			e.printStackTrace();
		}
		return null;
	}

For example, if your RTF is stored in a String variable, you can use the function like this:

String rtfText = ...;
String htmlText = rtfToHtml(new StringReader(rtfText));

And if it's in a file, you can do something like this:

String htmlText = rtfToHtml(new FileReader(new File("myfile.rtf")));