public class Task1 {
  private Task1(URL url) throws SAXException,
    ParserConfigurationException, IOException {
    // We create new instance of factory class
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    // We get new instance of DocumentBuilder using the factory class.
    DocumentBuilder builder = factory.newDocumentBuilder();
    // We utilize the DocumentBuilder to process an XML document
    // and we get document model in form of W3C DOM
    Document doc = builder.parse(url.toString());
  }
}

public class Task1 {
  private Document doc;
  // Method for a salary modification.
  // If the person’s salary is less then
  // minimum, the salary will increased to minimum.
  // No action is performed for the other persons.
  public void adjustSalary(double minimum) {
    // get the list of salaries
    NodeList salaries = doc.getElementsByTagName("salary");
    for (int i = 0; i < salaries.getLength(); i++) {
      // get the salary element
      Element salaryElement = (Element) salaries.item(i);
      // get payment
      double salary = Double.parseDouble(
         salaryElement.getTextContent());
      if (salary < minimum) {
        // modify the text node/content of element
        salaryElement.setTextContent(String.valueOf(minimum));
      }
    }
  }
}

public class Task1 {
   private Document doc;
   public void serializetoXML(File output) throws IOException,
   TransformerConfigurationException {
      // We create new instance of a factory class.
      TransformerFactory factory
        = TransformerFactory.newInstance();
      Transformer transformer
        = factory.newTransformer();
      // The input is the document placed in a memory
      DOMSource source = new DOMSource(doc);
      // The transformation output is the output file
      StreamResult result = new StreamResult(output);
      // Let’s make the transformation
      transformer.transform(source, result);
   }
}

<?xml version="1.0" encoding="UTF-8"?>
  <BookCatalogue xmlns="http://www.publishing.org">
    <Book>
      <Title>Yogasana Vijnana: the Science of Yoga</Title>
      <author>Dhirendra Brahmachari</Author>
      <Date>1966</Date>
      <ISBN>81-40-34319-4</ISBN>
      <Publisher>Dhirendra Yoga Publications</Publisher>
      <Cost currency="INR">11.50</Cost>
    </Book>
    <Book>
      <Title>The First and Last Freedom</Title>
      <Author>J. Krishnamurti</Author>
      <Date>1954</Date>
      <ISBN>0-06-064831-7</ISBN>
      <Publisher>Harper &amp; Row</Publisher>
      <Cost currency="USD">2.95</Cost>
    </Book>
</BookCatalogue>

try {
   for (int i = 0 ; i < count ; i++) {
      // pass the file name.. all relative entity
      // references will be resolved against this
      // as base URI.
      XMLStreamReader xmlr = xmlif.createXMLStreamReader(filename,
         new FileInputStream(filename));
         // when XMLStreamReader is created,
         // it is positioned at START_DOCUMENT event.
         int eventType = xmlr.getEventType();
         printEventType(eventType);
         printStartDocument(xmlr);
         // check if there are more events
         // in the input stream
         while(xmlr.hasNext()) {
            eventType = xmlr.next();
            printEventType(eventType);
            // these functions print the information
            // about the particular event by calling
            // the relevant function
            printStartElement(xmlr);
            printEndElement(xmlr);
            printText(xmlr);
            printPIData(xmlr);
            printComment(xmlr);
         }
      }
   }