import java.io.*;
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.ext.LexicalHandler;

class SAXCatch {
  static public void main(String[] args) throws Exception {
    XMLReader xmlReader = null;
    try {
  SAXParserFactory factory = SAXParserFactory.newInstance();
  SAXParser saxParser = factory.newSAXParser();
  xmlReader = saxParser.getXMLReader();
}
catch (FactoryConfigurationError fce) {
   System.err.println( "can't configure parser" );
} catch (ParserConfigurationException pce) {
   System.err.println( "can't provide parser" );
} catch (SAXException sxe) {
  System.err.println( sxe.getMessage () );
}

if( xmlReader != null ){
  try {
    xmlReader.setProperty(
       "http://xml.org/sax/properties/lexical-handler",
       new MyLexicalHandler()
    );
  }
  catch (SAXNotSupportedException nse) {
  System.out.println( "parser can't set property" );
} catch (SAXNotRecognizedException nre) {
  System.out.println( "unrecognized property" );
}

  try {
     xmlReader.parse( new File(args[0]).toURL().toString() );
  }
  catch (SAXParseException pe) {
    System.out.println( "Error at " + pe.getSystemId()
                         + " line " + pe.getLineNumber()
                             + ": " + pe.getMessage()     );
} catch (SAXException se) {                 // other SAX errors
    System.out.println( "ill-formed XML file" + se.getMessage());
} catch (IOException e) {
    System.out.println( "can't find/read file" );
} catch (Throwable t) { t.printStackTrace(); }  // other errors

}

} }