Parsing a Document

import org.xml.sax.*;
import org.xml.sax.helpers.*;
import java.io.*;


public class WellFormednessChecker {

  public static void main(String[] args) {
  
    Parser parser;
    try {
     parser = ParserFactory.makeParser();
    }
    catch (Exception e) {
      // fall back on Xerces parser by name
      try {
        parser = ParserFactory.makeParser(
         "org.apache.xerces.parsers.SAXParser");
      }
      catch (Exception eee) {
        System.err.println("Couldn't locate a SAX parser");
        return;          
      }
    }
     
    if (args.length == 0) {
      System.out.println(
       "Usage: java WellformednessChecker URL1 URL2..."); 
    } 
      
    // start parsing... 
    for (int i = 0; i < args.length; i++) {
      
      // command line should offer URIs or file names
      try {
        parser.parse(args[i]);
        // If there are no well-formedness errors, 
        // then no exception is thrown
        System.out.println(args[i] + " is well formed.");
      }
      catch (SAXException e) { // indicates a well-formedness error
        System.out.println(args[i] + " is not well formed.");
        System.out.println(e.getMessage());
      }
      catch (IOException e) {
        System.out.println("Could not check " + args[i] 
         + " because of the IOException " + e);
      }
      
    }   
  
  }

}