Java/XML/DefaultHandler

SAX event handler

 
import java.io.File;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;
public class TrySAXHandler {
  public static void main(String args[]) throws Exception {
    File file = new File("y.xml");
    SAXParserFactory spf = SAXParserFactory.newInstance();
    SAXParser parser = null;
    spf.setNamespaceAware(true);
    spf.setValidating(true);
    System.out.println("Parser will " + (spf.isNamespaceAware() ? "" : "not ")
        + "be namespace aware");
    System.out.println("Parser will " + (spf.isValidating() ? "" : "not ")
        + "validate XML");
    parser = spf.newSAXParser();
    System.out.println("Parser object is: " + parser);
    MySAXHandler handler = new MySAXHandler();
    parser.parse(file, handler);
  }
}
class MySAXHandler extends DefaultHandler {
  public void startDocument() {
    System.out.println("Start document: ");
  }
  public void endDocument() {
    System.out.println("End document: ");
  }
  public void startElement(String uri, String localName, String qname,
      Attributes attr) {
    System.out.println("Start element: local name: " + localName + " qname: "
        + qname + " uri: " + uri);
  }
  public void endElement(String uri, String localName, String qname) {
    System.out.println("End element: local name: " + localName + " qname: "
        + qname + " uri: " + uri);
  }
  public void characters(char[] ch, int start, int length) {
    System.out.println("Characters: " + new String(ch, start, length));
  }
  public void ignorableWhitespace(char[] ch, int start, int length) {
    System.out
        .println("Ignorable whitespace: " + new String(ch, start, length));
  }
}
<?xml version="1.0"?>
<circle>
  <radius>15</radius>
  <position>
    <x-coordinate>30</x-coordinate>
    <y-coordinate>50</y-coordinate>
  </position>
</circle>