Java XMLEventReader read xml file

import java.io.FileInputStream;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;

public class Main {

   public static void main(String[] args) throws Exception {
      XMLInputFactory factory = XMLInputFactory.newFactory();
      XMLEventReader reader = null;
      try (FileInputStream fis = new FileInputStream("xmlFile.xml")) {
         reader = factory.createXMLEventReader(fis);
         boolean inName = false;
         boolean inFeature = false;
         String id = null;/* w w w . j a v  a 2  s.co  m*/
         String name = null;
         String feature = null;

         while (reader.hasNext()) {
            XMLEvent event = reader.nextEvent();
            String elementName = null;
            switch (event.getEventType()) {
            case XMLEvent.START_ELEMENT:
               StartElement startElement = event.asStartElement();
               elementName = startElement.getName().getLocalPart();
               switch (elementName) {
               case "language":
                  id = startElement.getAttributeByName(QName.valueOf("id")).getValue();
                  break;
               case "name":
                  inName = true;
                  break;
               case "feature":
                  inFeature = true;
                  break;
               default:
                  break;
               }
               break;
            case XMLEvent.END_ELEMENT:
               EndElement endElement = event.asEndElement();
               elementName = endElement.getName().getLocalPart();
               if (elementName.equals("language")) {
                  System.out.printf("Language: %s\nName: %s\nFeature: %s\n\n", id, name, feature);
                  id = name = feature = null;
                  inName = inFeature = false;
               }
               break;
            case XMLEvent.CHARACTERS:
               String value = event.asCharacters().getData();
               if (inName) {
                  name = value;
                  inName = false;
               } else if (inFeature) {
                  feature = value;
                  inFeature = false;
               }
               break;
            }
         }
      }
      if (reader != null) {
         reader.close();
      }

   }
}