Creating SAXHandler and Parser

   import org.xml.sax.*;
   import org.xml.sax.helpers.DefaultHandler;
   import org.apache.xerces.parsers.SAXParser;

   class SaxParserGrades extends DefaultHandler
   {
   ....
   }

   public class SaxGrades 
   {
      public static void main(String[] args)
      {
	 try{
	    SaxParserGrades SAXHandler = new SaxParserGrades();
	    SAXParser parser = new SAXParser();
	    parser.setContentHandler(SAXHandler);
	    parser.setErrorHandler(SAXHandler);
	    parser.parse(args[0]);
	 }
	 catch(Exception e){
	    e.printStackTrace(System.err);
	 }
      }
   }