The Entity Class :
package events;

import java.util.Date;

public class Event {
   private Long id;
   private String title;
   private Date date;
   
   public Event(){}
   
   public Long getId() {
      return id;
   }
   
   private void setId(Long id) {
      this.id = id;
   }
   
   public Date getDate() {
      return date;
   }
   
   public void setDate(Date date) {
      this.date = date;
   }
   
   public String getTitle() {
      return title;
   }
   
   public void setTitle(String title) {
      this.title = title;
   }
}
      
   
   

package events;
import org.hibernate.Session;
import java.util.Date;
import util.HibernateUtil;
public class EventManager {
   public static void main(String[] args) {
      EventManager mgr = new EventManager();
      if (args[0].equals("store")) {
         mgr.createAndStoreEvent("My Event", new Date());
      }
      HibernateUtil.getSessionFactory().close();
   }
   private void createAndStoreEvent(String title, Date theDate) {
      Session session = HibernateUtil.getSessionFactory().getCurrentSession();
      session.beginTransaction();
      Event theEvent = new Event();
      theEvent.setTitle(title);
      theEvent.setDate(theDate);
      session.save(theEvent);
      session.getTransaction().commit();
   }
}

<?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>

package util;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
   private static final SessionFactory sessionFactory;
   static {
      try {
         // Create the SessionFactory from hibernate.cfg.xml
         Configuration configure = new Configuration().configure();

         sessionFactory = configure
               .buildSessionFactory();
      } catch (Throwable ex) {
         // Make sure you log the exception, as it might be swallowed
         System.err.println("Initial SessionFactory creation failed.   "
               + ex);
         throw new ExceptionInInitializerError(ex);
      }
   }
   public static SessionFactory getSessionFactory() {
      return sessionFactory;
   }
}

<project name="hibernate-tutorial" default="compile">
   <property name="sourcedir" value="${basedir}/src" />
   <property name="targetdir" value="${basedir}/bin" />
   <property name="librarydir" value="${basedir}/lib" />
   <path id="libraries">
      <fileset dir="${librarydir}">
         <include name="*.jar" />
      </fileset>
   </path>
   <target name="clean">
      <delete dir="${targetdir}" />
      <mkdir dir="${targetdir}" />
   </target>
   <target name="compile" depends="clean, copy-resources">
      <javac srcdir="${sourcedir}" source="1.5" destdir="${targetdir}" debug="true" classpathref="libraries" />
   </target>
   <target name="copy-resources">
      <copy todir="${targetdir}">
         <fileset dir="${sourcedir}">
            <exclude name="**/*.java" />
         </fileset>
      </copy>
   </target>
   <target name="run" depends="compile">
      <java fork="true" classname="events.EventManager" classpathref="libraries">
         <classpath path="${targetdir}" />
         <arg value="${action}" />
      </java>
   </target>
</project>

Buildfile: D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\build.xml
clean:
   [delete] Deleting directory D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\bin
    [mkdir] Created dir: D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\bin
copy-resources:
     [copy] Copying 3 files to D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\bin
     [copy] Copied 2 empty directories to 1 empty directory under D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\bin
compile:
    [javac] Compiling 3 source files to D:\developDir\workspace\MyEclipse6.0\MyHibernateReferenceCode\bin
run:
     [java] log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
     [java] log4j:WARN Please initialize the log4j system properly.
     [java] Initial SessionFactory creation failed.   java.lang.UnsupportedClassVersionError: Bad version number in .class file
     [java] Exception in thread "main" java.lang.ExceptionInInitializerError
     [java]    at util.HibernateUtil.<clinit>(HibernateUtil.java:17)
     [java]    at events.EventManager.main(EventManager.java:11)
     [java] Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class file
     [java]    at java.lang.ClassLoader.defineClass1(Native Method)
     [java]    at java.lang.ClassLoader.defineClass(Unknown Source)
     [java]    at java.security.SecureClassLoader.defineClass(Unknown Source)
     [java]    at java.net.URLClassLoader.defineClass(Unknown Source)
     [java]    at java.net.URLClassLoader.access$100(Unknown Source)
     [java]    at java.net.URLClassLoader$1.run(Unknown Source)
     [java]    at java.security.AccessController.doPrivileged(Native Method)
     [java]    at java.net.URLClassLoader.findClass(Unknown Source)
     [java]    at java.lang.ClassLoader.loadClass(Unknown Source)
     [java]    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
     [java]    at java.lang.ClassLoader.loadClass(Unknown Source)
     [java]    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
     [java]    at java.lang.Class.forName0(Native Method)
     [java]    at java.lang.Class.forName(Unknown Source)
     [java]    at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:57)
     [java]    at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
     [java]    at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:56)
     [java]    at org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:397)
     [java]    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
     [java]    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1933)
     [java]    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1216)
     [java]    at util.HibernateUtil.<clinit>(HibernateUtil.java:11)
     [java]    ... 1 more
     [java] Java Result: 1
BUILD SUCCESSFUL
Total time: 6 seconds