import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.io.File;
import java.io.IOException;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;


class DomTest {
    public static void main (String[] args) {
        File f = new File(args[0]);
        Document document;
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            document = builder.parse(f);
            NodeList nl = document.getElementsByTagName("foo");
            System.out.println("How many? " + nl.getLength());
            // Obviously making a lot of assumptions about what's where
            Node foo = nl.item(0);
            System.out.println(foo.getChildNodes().item(0));
        // these catch clauses pasted in from some tutorial online
        } catch (SAXParseException spe) {
          // Error generated by the parser
          System.out.println("\n** Parsing error"
            + ", line " + spe.getLineNumber()
            + ", uri " + spe.getSystemId());
          System.out.println("   " + spe.getMessage() );

          // Use the contained exception, if any
          Exception  x = spe;
          if (spe.getException() != null)
            x = spe.getException();
          x.printStackTrace();

        } catch (SAXException sxe) {
          // Error generated during parsing
          Exception  x = sxe;
          if (sxe.getException() != null)
            x = sxe.getException();
          x.printStackTrace();

        } catch (ParserConfigurationException pce) {
          // Parser with specified options can't be built
          pce.printStackTrace();

        } catch (IOException ioe) {
          // I/O error
          ioe.printStackTrace();
        }
    }
}