Parsing XML Files with SAX

Code Source: http://www.java2s.com/Code/Java/XML/ParsingXMLFileswithSAX.htm
Anonymous inner class description: http://stackoverflow.com/questions/4216093/writing-a-class-while-instantiating-it
The anonymous inner classes is very useful in some situation. For example consider a situation where you need to create the instance of an object without creating subclass of a class and also performing additional tasks such as method overloading

<PHONEBOOK>
<PERSON>
 <NAME>Joe Wang</NAME>
 <EMAIL>joe@yourserver.com</EMAIL>
 <TELEPHONE>202-999-9999</TELEPHONE>
 <WEB>www.java2s.com</WEB>
</PERSON>
<PERSON>
 <NAME>Karol</name>
 <EMAIL>karol@yourserver.com</EMAIL>
 <TELEPHONE>306-999-9999</TELEPHONE>
 <WEB>www.java2s.com</WEB>
</PERSON>
<PERSON>
 <NAME>Green</NAME>
 <EMAIL>green@yourserver.com</EMAIL>
 <TELEPHONE>202-414-9999</TELEPHONE>
 <WEB>www.java2s.com</WEB>
</PERSON>
</PHONEBOOK>

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class NameLister {
  public static void main(String args[]) {
    if (args.length != 1) {
      System.err.println("Usage: java NameLister xmlfile.xml");
      System.exit(-1);
    }
    try {
      SAXParserFactory factory = SAXParserFactory.newInstance();
      SAXParser saxParser = factory.newSAXParser();
      DefaultHandler handler = new DefaultHandler() {
        boolean name = false;
        public void startElement(String uri, String localName,
            String qName, Attributes attributes)
            throws SAXException {
          if (qName.equalsIgnoreCase("NAME")) {
            name = true;
          }
        }
        public void characters(char ch[], int start, int length)
            throws SAXException {
          if (name) {
            System.out.println("Name: "
                + new String(ch, start, length));
            name = false;
          }
        }
      };
      saxParser.parse(args[0], handler);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}