private void createDOM() throws ParserConfigurationException {
   if (dbf == null) {
     dbf = DocumentBuilderFactory.newInstance();
     db = dbf.newDocumentBuilder();
     dil = (DOMImplementationLS) db.getDOMImplementation();
     dw = dil.createDOMWriter();
   }
 }
  public static void main(String[] args) {

    try {

      // Find the implementation
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      factory.setNamespaceAware(true);
      DocumentBuilder builder = factory.newDocumentBuilder();
      DOMImplementation impl = builder.getDOMImplementation();

      // Create the document
      DocumentType svgDOCTYPE =
          impl.createDocumentType(
              "svg",
              "-//W3C//DTD SVG 1.0//EN",
              "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd");
      Document doc = impl.createDocument("http://www.w3.org/2000/svg", "svg", svgDOCTYPE);

      // Fill the document
      Node rootElement = doc.getDocumentElement();
      ProcessingInstruction xmlstylesheet =
          doc.createProcessingInstruction(
              "xml-stylesheet", "type=\"text/css\" href=\"standard.css\"");
      Comment comment = doc.createComment("An example from Chapter 10 of Processing XML with Java");
      doc.insertBefore(comment, rootElement);
      doc.insertBefore(xmlstylesheet, rootElement);
      Node desc = doc.createElementNS("http://www.w3.org/2000/svg", "desc");
      rootElement.appendChild(desc);
      Text descText = doc.createTextNode("An example from Processing XML with Java");
      desc.appendChild(descText);

      // Serialize the document onto System.out
      TransformerFactory xformFactory = TransformerFactory.newInstance();
      Transformer idTransform = xformFactory.newTransformer();
      Source input = new DOMSource(doc);
      Result output = new StreamResult(System.out);
      idTransform.transform(input, output);

    } catch (FactoryConfigurationError e) {
      System.out.println("Could not locate a JAXP factory class");
    } catch (ParserConfigurationException e) {
      System.out.println("Could not locate a JAXP DocumentBuilder class");
    } catch (DOMException e) {
      System.err.println(e);
    } catch (TransformerConfigurationException e) {
      System.err.println(e);
    } catch (TransformerException e) {
      System.err.println(e);
    }
  }