XML parsing (reformatted) - please any insight would help

Question

Hey there,
Im having a problem, code compiles but doesnt work gives no output.
Please can someone help me with this.
This is the Code
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import java.io.*;
public class ReadLibrary extends DefaultHandler {
public static void main(String[] arguments) {
if (arguments.length > 0) {
// ReadLibrary read = new ReadLibrary("w:\\Collection.librml.xml");
} else {
System.out.println("Usage: java ReadLibrary filename");
ReadLibrary(String libFile) {
File input = new File(libFile);
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
try {
SAXParser sax = factory.newSAXParser();
sax.parse(input, new LibraryHandler() );
} catch (ParserConfigurationException pce) {
System.out.println("Could not create that parser.");
System.out.println(pce.getMessage());
} catch (SAXException se) {
System.out.println("Problem with the SAX parser.");
System.out.println(se.getMessage());
} catch (IOException ioe) {
System.out.println("Error reading file.");
System.out.println(ioe.getMessage());
class LibraryHandler extends DefaultHandler {
static int READING_TITLE = 1;
static int READING_AUTHOR = 2;
static int READING_PUBLISHER = 3;
static int READING_PUBLICATION_DATE = 4;
static int READING_SUBJECT = 5;
static int READING_REVIEW = 6;
static int READING_NOTHING = 0;
int currentActivity = READING_NOTHING;
Book libraryBook = new Book();
LibraryHandler() {
super();
public void startElement(String uri, String localName,
String qName, Attributes attributes) {
if (localName.equals("Title"))
currentActivity = READING_TITLE;
else if (localName.equals("Author"))
currentActivity = READING_AUTHOR;
else if (localName.equals("Publisher"))
currentActivity = READING_PUBLISHER;
else if (localName.equals("PublicationDate"))
currentActivity = READING_PUBLICATION_DATE;
else if (localName.equals("Subject"))
currentActivity = READING_SUBJECT;
else if (localName.equals("Review"))
currentActivity = READING_REVIEW;
if (currentActivity == READING_PUBLICATION_DATE) {
libraryBook.isbn = attributes.getValue("isbn");
libraryBook.edition = attributes.getValue("edition");
public void characters(char[] ch, int start, int length) {
String value = new String(ch, start, length);
if (currentActivity == READING_TITLE)
libraryBook.title = value;
if (currentActivity == READING_AUTHOR)
libraryBook.author = value;
if (currentActivity == READING_PUBLISHER)
libraryBook.publisher = value;
if (currentActivity == READING_PUBLICATION_DATE)
libraryBook.publicationDate = value;
if (currentActivity == READING_SUBJECT)
libraryBook.subject = value;
if (currentActivity == READING_REVIEW)
libraryBook.review = value;
public void endElement(String uri, String localName, String qName) {
if (localName.equals("Book")) {
System.out.println("\nTitle: " + libraryBook.title);
System.out.println("Author: " + libraryBook.author);
System.out.println("Publisher: " + libraryBook.publisher);
System.out.println("Publication Date: "
+ libraryBook.publicationDate);
System.out.println("Edition: " + libraryBook.edition);
System.out.println("ISBN: " + libraryBook.isbn);
System.out.println("Review: " + libraryBook.review);
libraryBook = new Book();
class Book {
String title;
String author;
String publisher;
String publicationDate;
String edition;
String isbn;
String subject;
String review;
}and This is the XML
<?xml version="1.0"?>
<!DOCTYPE Library SYSTEM "librml.dtd">
<Library>
<Book>
<Author>Joseph Heller</Author>
<Title>Catch-22</Title>
<PublicationDate edition="Trade" isbn="0684833395">09/1996</PublicationDate>
<Publisher>Simon and Schuster</Publisher>
<Subject>Fiction</Subject>
<Review>heller-catch22.html</Review>
</Book>
<Book>
<Author>Kurt Vonnegut</Author>
<Title>Slaughterhouse-Five</Title>
<PublicationDate edition="Paperback" isbn="0440180295">12/1991</PublicationDate>
<Publisher>Dell</Publisher>
<Subject>Fiction</Subject>
</Book>
</Library>

Answer 1

Sorry i am new to this XML stuff so i think im going to sound really dumb,
the code there comes from a Samms teach urself java in 21 days, shouldnt the println's in endElement be displayed? and regarding the LibraryBook = new LibraryBook() that was in the example code.
To see the tag data how would i display it ?