How to instantiate object in JSP/STRUTS page?

I worked through the STRUTS tutorial (http://rzserv2.fhnon.de/~lg002556/struts/Doku.html) but I get errors when I try to instantiate an object of a class that is in my WEB-INF/classes directory:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 14 in the jsp file: /BookSerialize.jsp
Generated servlet error:
[javac] Compiling 1 source file
D:\Programme\jakarta-tomcat-4.1.12\work\Standalone\localhost\strutsdemo\BookSerialize_jsp.java:86: cannot resolve symbol
symbol : class Book
location: class org.apache.jsp.BookSerialize_jsp
Book book = new Book();
^
The Book.class (and other classes) is in the WEB-INF/classes directory. The BookSerialize.jsp is here:
<%@ page language="java" import="java.beans.XMLEncoder, java.beans.XMLDecoder, java.io.*"%>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html:html locale="true">
<head>
<html:base/>
<title><bean:message key="index.title"/></title>
</head>
<body bgcolor="white">
<h2>Book Serialization</h2>
<%
Book book = new Book();
book.setTitle("A great Book about Struts");
book.setPages(100);
out.println("<member>First Title: " + book.getTitle() + "</member>");
try {
XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(new FileOutputStream("/Sample.xml")));
encoder.writeObject(book);
encoder.close();
} catch(Exception ex) {
out.println(ex);
book.setTitle("A great Book about Struts, Second Edition");
out.println("<member>Second Title: " + book.getTitle() + "</member>");
try {
XMLDecoder decoder = new XMLDecoder(new BufferedInputStream(new FileInputStream("/Sample.xml")));
book = (Book) decoder.readObject();
decoder.close();
} catch(Exception ex) {
out.println("<h1>" + ex + "</h1>");
out.println("<member>Third Title: " + book.getTitle() + "</member>");
%>
</body>
</html:html>
I also get the same error when deploying and (trying to) run on the J2EE 1.3.1 server.
So far, I just used JSP pages working with beans (usebean tag). Is it possible at all to just do a
MyClass myObject = new MyClass();
within a JSP page, if MyClass.class is in the WEB-INF/classes of the web application?
Is there any kind of import missing? Book.class is in the default package, so i can't state it in the page directive/import parameter of the JSP page...
any advice?

I think, I got it: you have to use package names for your classes and avoid the default package. After I used a package name, it was possible to instantiate the object ....

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