XML SQL Utility:Why it doesn't work?

Question

I am trying to use the XML SQL Utility
by modifying the given example samp1.java
for the JDBC-ODBC driver but errors emerged.
Is there any thing wrong? Thanks.
(The classpath setting is ok, I think)
***** Here is the error message:
D:\OracleXSU\sample>java Sample
Exception in thread "main" java.lang.NoClassDefFoundError: oracle/sql/Datum
at oracle.xml.sql.query.OracleXMLQuery.<init>(OracleXMLQuery.java:127)
at Sample.main(Sample.java:42)
D:\OracleXSU\sample>
***** Here is the source code:
/** Simple example on using Oracle XMLSQL API; this class queries the database with "select * from emp" in scott/tiger schema; then from the results of query it generates an XML document */
import java.sql.*;
import java.math.*;
import oracle.xml.sql.query.*;
// import oracle.jdbc.*;
// import oracle.jdbc.driver.*;
public class Sample
//========================================
// main() - public static void
public static void main(String args[]) throws SQLException
String tabName = "sbook";
String user = "scott/tiger";
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
// DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
//init a JDBC connection
// Connection conn =
// DriverManager.getConnection("jdbc:oracle:oci8:"+user+"@");
Connection conn = DriverManager.getConnection("jdbc:odbc:SQLUtil");
// create statement and execute it to get the ResultSet
Statement stmt = conn.createStatement();
ResultSet rset = stmt.executeQuery("select * from "+tabName );
if(rset!=null)
// init the OracleXMLQuery; note we could have passed the sql query string
// instead of the ResultSet
OracleXMLQuery qry = new OracleXMLQuery(conn,rset);
// get the XML document is the string format
String xmlString = qry.getXMLString();
// print out the result
System.out.println(" OUPUT IS:\n"+xmlString);
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Answer 1

Firstly I think it is because the XML SQL Utility does not work with JDBC-ODBC driver.
So I try it again with Oracle driver.
But it still doesn't work? Why?
***** Here is the source code:
/** Simple example on using Oracle XMLSQL API; this class queries the database with "select * from emp" in scott/tiger schema; then from the results of query it generates an XML document */
import java.sql.*;
import java.math.*;
import oracle.xml.sql.query.*;
import oracle.jdbc.*;
import oracle.jdbc.driver.*;
public class Sample2
//========================================
// main() - public static void
public static void main(String args[]) throws SQLException
String tabName = "emp";
String user = "scott/tiger";
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
//init a JDBC connection
// Connection conn =
// DriverManager.getConnection("jdbc:oracle:oci8:"+user+"@");
//init a JDBC connection
Connection conn = DriverManager.getConnection ("...Connection information...");
// create statement and execute it to get the ResultSet
Statement stmt = conn.createStatement();
// ResultSet rset = stmt.executeQuery("select * from "+tabName );
ResultSet rset = stmt.executeQuery("select * from COFFEES" );
// Test if connection is sucessful -- it works!
int i=0;
while(rset.next())
i++;
System.out.println("Total rows="+i);
// init the OracleXMLQuery; note we could have passed the sql query string
// instead of the ResultSet
OracleXMLQuery qry = new OracleXMLQuery(conn,rset);
// get the XML document is the string format
String xmlString = qry.getXMLString();
// print out the result
System.out.println(" OUPUT IS:\n"+xmlString);
null