Hibernate - Simple Update

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.Transaction;

public class SimpleUpdateTest {
 
 
 public static void main(String[] args) {
 HibernateUtil.setup("create table EVENTS ( EVENT_ID int, EVENT_DATE date, title VARCHAR);");
 // hibernate code start
 Session session = HibernateUtil.currentSession();
 Transaction tx = session.beginTransaction();

 Event theEvent = new Event();
 theEvent.setTitle("My Event");
 theEvent.setDate(new Date());

 session.save(theEvent);

 tx.commit();
 HibernateUtil.closeSession();

 HibernateUtil.sessionFactory.close();
 // hibernate code end
 
 update();
 
 HibernateUtil.checkData("select * from events;");

 }
 public static void update(){
 Session session = HibernateUtil.currentSession();
 Transaction tx = session.beginTransaction();
 
 Event e = (Event)session.get(Event.class, new Long(1));
 
 e.setTitle("new Title");
 session.update(e);
 
 tx.commit();
 HibernateUtil.closeSession();
 
 }
}
<code>


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

<hibernate-mapping>
 <class name="Event" table="EVENTS">
 <id name="id" column="EVENT_ID">
 <generator class="increment"/>
 </id>
 <property name="date" type="timestamp" column="EVENT_DATE"/>
 <property name="title"/>
 </class>


 <class name="EventWithAttendee" table="eventwithattendee">
 <id name="id" column="uid" type="long" unsaved-value="null">
 <generator class="native"/>
 </id>
 <property name="name" type="string" length="100"/>
 <property name="startDate" column="start_date"
  type="date"/>
 <property name="duration" type="integer"/>
 <many-to-one name="location" column="location_id"
  class="Location"/>
 <set name="attendees" cascade="all">
 <key column="event_id"/>
 <one-to-many class="EventAttendee"/>
 </set>
 </class>

 <class name="EventAttendee" table="attendees">
 <id name="id" column="uid" type="long">
 <generator class="native"/>
 </id>
 <property name="firstName" type="string" length="20"/>
 <property name="lastName" type="string" length="20"/>
 </class>

 <class name="Location" table="locations">
 <id name="id" column="uid" type="long">
 <generator class="native"/>
 </id>
 <property name="name" type="string"/>
 <property name="address" type="string"/>
 </class>
</hibernate-mapping></code>
<code>import java.util.Date;

public class Event {
 private Long id;

 private String title;

 private Date date;

 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;
 }

 public String toString() {
 return "ID:" + id + "\nTitle:" + title + "\nDate:" + date;
 }
}
</code><code>

<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

 <session-factory>

 <!-- Database connection settings -->
 <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
 <property name="connection.url">jdbc:hsqldb:data/tutorial</property>
 <property name="connection.username">sa</property>
 <property name="connection.password"></property>

 <!-- JDBC connection pool (use the built-in) -->
 <property name="connection.pool_size">1</property>

 <!-- SQL dialect -->
 <property name="dialect">org.hibernate.dialect.HSQLDialect</property>

 <!-- Echo all executed SQL to stdout -->
 <property name="show_sql">true</property>

 <mapping resource="Event.hbm.xml"/>

 </session-factory>

</hibernate-configuration>
</code><code>