duplicate class: org.hibernate.tutorial.domain.Event

Nicsoft · **Joined:** Thu Feb 19, 2009 12:24 pm **Posts:** 14

Hello,

I have problems when trying to learn Hibernate and I am a newbie to this and not senior of Java either. Hope anyone can help out. Thanks in advance!

The short version of the problem is "duplicate class: org.hibernate.tutorial.domain.Event" when I am trying to build the tutorial (http://www.hibernate.org/hib_docs/v3/re ... stapp.html) with Ant. It gets stuck on the "Compile" tag. See below for more details. I believe I have followed the instructions correctly, except the part where I should enable some kind of logging. I guess that doesn't matter, right?

Version of Hibernate: 3.3.1.GA:

Mapping documents:

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

    <class name="events.Event" table="EVENTS">
        <id name="id" column="EVENT_ID">
            <generator class="native"/>
        </id>
        <property name="date" type="timestamp" column="EVENT_DATE"/>
        <property name="title"/>
    </class>

</hibernate-mapping>[/b]

[b]Code between sessionFactory.openSession() and session.close():

Code:

Session session = HibernateUtil.getSessionFactory().getCurrentSession();

        session.beginTransaction();

        Event theEvent = new Event();
        theEvent.setTitle(title);
        theEvent.setDate(theDate);

        session.save(theEvent);

        session.getTransaction().commit();

Full stack trace of any exception that occurs:
C:\TestArea\Hibernate>ant

Code:

Buildfile: build.xml

clean:
   [delete] Deleting directory C:\TestArea\Hibernate\bin
    [mkdir] Created dir: C:\TestArea\Hibernate\bin

copy-resources:
     [copy] Copying 2 files to C:\TestArea\Hibernate\bin
     [copy] Copied 2 empty directories to 1 empty directory under C:\TestArea\Hi
bernate\bin

compile:
    [javac] Compiling 3 source files to C:\TestArea\Hibernate\bin
    [javac] C:\TestArea\Hibernate\src\events\Event.java:5: duplicate class: org.
hibernate.tutorial.domain.Event
    [javac] public class Event {
    [javac]        ^
    [javac] C:\TestArea\Hibernate\src\events\EventManager.java:26: cannot access
 events.Event
    [javac] bad class file: C:\TestArea\Hibernate\src\events\Event.java
    [javac] file does not contain class events.Event
    [javac] Please remove or make sure it appears in the correct subdirectory of
 the classpath.
    [javac]         Event theEvent = new Event();
    [javac]         ^
    [javac] 2 errors

BUILD FAILED
C:\TestArea\Hibernate\build.xml:21: Compile failed; see the compiler error outpu
t for details.

Total time: 2 seconds[/b]

[b]Name and version of the database you are using:
hsqldb 1.8.0.10

Best Regards
Niklas

ethnarch · **Joined:** Tue Aug 01, 2006 9:24 pm **Posts:** 120

Someone might want to correct me on this but it looks like there is something wrong with your directory structure

Code:

    [javac] C:\TestArea\Hibernate\src\events\Event.java:5: duplicate class: org. 
hibernate.tutorial.domain.Event

This indicates that there is an Event.java in the "events" package. Where as there is also an Event class in the "org.hibernate.tutorial.domain" package.

Are you sure you don't have 2 of these?
[/code]

Nicsoft · **Joined:** Thu Feb 19, 2009 12:24 pm **Posts:** 14

I solved the problem. If you do exactly as the tutorial expalains you will have this error since the Events class package is defined to

Quote:

Code:

package org.hibernate.tutorial.domain;

but it should be defined to

Quote:

Code:

packge events;

Thank you for your time!

Now I am heading to the next problem to solve....: http://forum.hibernate.org/viewtopic.php?p=2406621#2406621

Best Regards,
Niklas