I have downloaded the latest version of xerces (xml parser).

I am trying out an example from Beginning Java Databases book.

I have set the classpath as c:\Xerces-J-bin.1.4.4\xerces-1_4_4\xerces.jar;

The file below compiles but I am not able to run it. It says that No Class Defination is found. What am I missing in the classpath?

import java.sql.*; /* JDBC Classes*/
import java.io.*; /* Java IO */
import org.w3c.dom.*; /* W3C Interfaces */
import org.apache.xerces.dom.*; /* Xerces DOM Classes */
import org.apache.xml.serialize.*; /* Xerces Serializer */


public class databasexml {

  public static final String JDBCURL = "oracle.jdbc.driver.OracleDriver";
  public static final String JDBCDRIVER ="jdbc:oracle:thin:@wcsuds1.ctstateu.edu:1521:wprac";
  public static final String SQL = "select customerid, customerfirstname, customerlastname from customers";
  public static String OUTPUTFILE = "c:
customers.xml";

  public static void main(String[] args) {

    try{

    /** Step 1 : Making a JDBC Connection with database" **/
    Class.forName(JDBCDRIVER).newInstance();
    Connection conn = DriverManager.getConnection(JDBCURL);

    /** Step 2 : Retrieve the customer data from database **/
    Statement statement = conn.createStatement();
    ResultSet customerRS = statement.executeQuery(SQL);

    /** Step 3 : Build customer XML DOM **/
    Document xmlDoc = buildCustomerXML(customerRS);

    /** Step 4 : Write output to a file **/
    File outputFile = new File(OUTPUTFILE);
    printDOM(xmlDoc, outputFile);

    conn.close(); /*Connection close*/
    }
    catch(Exception e)
    {
      System.out.println("Really poor exception handling " +e.toString());
    }
  }//Main

  /*Build XML DOcument from database. The XML object is returned to main method where it is written to flat file.*/
  private static Document buildCustomerXML(ResultSet _customerRS) throws Exception
  {

  Document xmlDoc = new DocumentImpl();

  /* Creating the root element */
  Element rootElement = xmlDoc.createElement("CUSTOMERS");
  xmlDoc.appendChild(rootElement);

  while(_customerRS.next())
   {
    Element customer = xmlDoc.createElement("CUSTOMER");

    /* Build the CustomerId as a Attribute*/
    customer.setAttribute("customerid", _customerRS.getString("customerid"));

    /* Creating elements within customer DOM*/
    Element firstName = xmlDoc.createElement("FIRSTNAME");
    Element lastName = xmlDoc.createElement("LASTNAME");

    /* Populating Customer DOM with Data*/
    firstName.appendChild(xmlDoc.createTextNode(_customerRS.getString("customerfirstname")));
    lastName.appendChild(xmlDoc.createTextNode(_customerRS.getString("customerlastname")));

    /* Adding the firstname and lastname elements to the Customer Element*/
    customer.appendChild(firstName);
    customer.appendChild(lastName);

    /* Appending Customer to the Root Class*/
    rootElement.appendChild(customer);
   }
  return xmlDoc;
  }

  /* printDOM will write the contents of xml document passed onto it out to a file*/
  private static void printDOM(Document _xmlDoc, File _outputFile) throws Exception
  {
    OutputFormat outputFormat = new OutputFormat("XML","UTF-8",true);
    FileWriter fileWriter = new FileWriter(_outputFile);

    XMLSerializer xmlSerializer = new XMLSerializer(fileWriter, outputFormat);

    xmlSerializer.asDOMSerializer();

    xmlSerializer.serialize(_xmlDoc.getDocumentElement());
  }

 }

add the directory in which you have your class file to the classpath. I think it is not able to find ur databasexml.class file

looks like you missed out the oracle driver zip file : classes12.zip in the classpath.