Problem with basic tutorial!

Question

I am following this very basic tutorial:
http://xstream.codehaus.org/tutorial.html
But when I parse this xml:
<person>
<firstname>Joe</firstname>
<lastname>Walnes</lastname>
<phone>
<code>123</code>
<number>1234-456</number>
</phone>
<fax>
<code>123</code>
<number>9999-999</number>
</fax>
</person>
to the Person object I get the error:
[Fatal Error] :1:1: Content is not allowed in prolog.
Exception in thread "main" com.thoughtworks.xstream.io.StreamException: : Content is not allowed in prolog.
This is the code:
public class Person {
private String firstname;
private String lastname;
private PhoneNumber phone;
private PhoneNumber fax;
public class PhoneNumber {
private int code;
private String number;
public void runXStream(){
String pathToXml = "testP.xml";
XStream xstream = new XStream(new DomDriver());
xstream.alias("person", Person.class);
xstream.alias("phonenumber", PhoneNumber.class);
Person p = (Person)xstream.fromXML(pathToXml);
What am I missing?

Answer 1

xstream.alias("person", Person.class);
xstream.alias("phonenumber", PhoneNumber.class);I'm not familiar with the API you're using, but from looking at the above, I'm guessing this means:
"Any tag named 'person' should be de-serialized into a Person object"
Ok, fine.
And
"Any tag named "phonenumber" should be de-serialized into a PhoneNumber object"
Well, I see no "phonenumber" tag in your xml. I see "phone" though.
And what about "fax"?