import javax.xml.parsers.*;
import org.xml.sax.XMLReader;
import java.io.File;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;

class SAXresolve {
  static public void main(String[] args)
                         throws Exception {
    SAXParserFactory factory =
               SAXParserFactory.newInstance();
    factory.setValidating(true);
    SAXParser saxParser =
               factory.newSAXParser();
    XMLReader xmlReader =
               saxParser.getXMLReader();
    xmlReader.setEntityResolver( new MyEntityResolver() );
    xmlReader.parse
      ( new File(args[0]).toURL().toString() );
} }
class MyEntityResolver implements EntityResolver {
  public InputSource resolveEntity (
                      String publicId, String systemId) {
    if(  publicId.equals("resolve.dtd")
      || systemId.equals("resolve.dtd")  ){
             String url = "sys-resolve.dtd" ;
             return new InputSource( url );
    } else { return null; }
  }
}