import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.*;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.io.File;
public class DOMxml {
  public static void main(String args[])
             throws ParserConfigurationException,
                        SAXException, IOException  {
     DocumentBuilderFactory factory =
           DocumentBuilderFactory.newInstance();
     DocumentBuilder builder =
           factory.newDocumentBuilder();
     Document doc = builder.parse (new File(args[0]).toURL().toString());
     new TreeTraverser (doc);
} }
class TreeTraverser{
  TreeTraverser (Node node){
    switch( node.getNodeType() ){
  case   Node.DOCUMENT_NODE: visit((Document) node); break;
  case    Node.ELEMENT_NODE: visit((Element) node);  break;
  case  Node.ATTRIBUTE_NODE: visit((Attr) node);     break;
  default:;
}

    int i;
    if( node.hasAttributes() ){
       NamedNodeMap attributes = node.getAttributes()   ;
       for( i=0; i < attributes.getLength(); i++ ){
          new TreeTraverser ( attributes.item(i) );
    } }
    if( node.hasChildNodes() ){
       NodeList children = node.getChildNodes();
       for( i=0; i < children.getLength(); i++ ){
          new TreeTraverser ( children.item(i) );
  } }  }
  void visit(Document node){
  System.out.println( "The root" ); }
void visit(Element node){
  System.out.println( "Element:  " + node.getTagName() ); }
void visit(Attr node){
  System.out.println( "Attr:  " + node.getName() ); }

}