// ExampleDomShowNodes.java
                                       
                                       import java.io.*;
                                       import org.xml.sax.*;
                                       import org.w3c.dom.*;
                                       import javax.xml.parsers.*;
                                       
                                       
                                       public class ExampleDomShowNodes
                                       {
                                         public static void main( String[] argv )
                                         {
                                           if( argv.length != 2 )
                                           {
                                             System.err.println( "Usage:   java ExampleDomShowNodes <XmlFile> <TagName>" );
                                             System.err.println( "Example: java ExampleDomShowNodes MyXmlFile.xml Button" );
                                             System.exit( 1 );
                                           }
                                           try {
                                             // ---- Parse XML file ----
                                             DocumentBuilderFactory factory  = DocumentBuilderFactory.newInstance();
                                             DocumentBuilder        builder  = factory.newDocumentBuilder();
                                             Document               document = builder.parse( new File( argv[0] ) );
                                             // ---- Get list of nodes to given element tag name ----
                                             NodeList ndList = document.getElementsByTagName( argv[1] );
                                             printNodesFromList( ndList );  // printNodesFromList see below
                                             // ---- Error handling ----
                                           } catch( SAXParseException spe ) {
                                               System.out.println( "\n** Parsing error, line " + spe.getLineNumber()
                                                                                   + ", uri "  + spe.getSystemId() );
                                               System.out.println( "   " + spe.getMessage() );
                                               Exception e = ( spe.getException() != null ) ? spe.getException() : spe;
                                               e.printStackTrace();
                                           } catch( SAXException sxe ) {
                                               Exception e = ( sxe.getException() != null ) ? sxe.getException() : sxe;
                                               e.printStackTrace();
                                           } catch( ParserConfigurationException pce ) {
                                               pce.printStackTrace();
                                           } catch( IOException ioe ) {
                                               ioe.printStackTrace();
                                           }
                                         }
                                       
                                         // ---- Helper methods ----
                                       
                                         private static void printObjIfVisible( String sValName, Object obj )
                                         {
                                           if( null == obj )  return;
                                           String s = obj.toString();
                                           if( null != s && 0 < s.trim().length() && !s.trim().equals( "\n" ) )
                                             System.out.println( sValName + s );
                                         }
                                       
                                         public static void printNodeInfos( String sNodeName, Node node )
                                         {
                                           System.out.println(  "\n---------------------- " + sNodeName );
                                           if( null != node )
                                           {
                                             printObjIfVisible(   "getNodeType()        = ", "" + node.getNodeType() );
                                             printObjIfVisible(   "getNodeName()        = ", node.getNodeName() );
                                             printObjIfVisible(   "getLocalName()       = ", node.getLocalName() );
                                             printObjIfVisible(   "getNodeValue()       = ", node.getNodeValue() );
                                             if( node.hasAttributes() )
                                               printObjIfVisible( "getAttributes()      = ", node.getAttributes() );
                                             if( node.hasChildNodes() ) {
                                               printObjIfVisible( "getChildNodes()      = ", node.getChildNodes() );
                                               printObjIfVisible( "getFirstChild()      = ", node.getFirstChild() );
                                             }
                                             printObjIfVisible(   "getPreviousSibling() = ", node.getPreviousSibling() );
                                             printObjIfVisible(   "getNextSibling()     = ", node.getNextSibling() );
                                           }
                                           System.out.println(    "----------------------\n" );
                                         }
                                       
                                         public static void printNodesFromList( NodeList ndList )
                                         {
                                           for( int i=0; i<ndList.getLength(); i++ )
                                             printNodeInfos( "ndList.item("+i+")", ndList.item(i) );
                                         }
                                       }