public class TestClass  {

    private Long id;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

}

        try {
            Configuration config = new Configuration();
            config.addClass(TestClass.class);

            SessionFactory fac = config.buildSessionFactory();
            Session s = fac.openSession();
            s.save(new TestClass());
            s.flush();
            s.close();
        } catch (HibernateException e) {
            e.printStackTrace();
        }

<hibernate-mapping>
   <class name="test.TestClass" table="TestClass">
      <id type="long" name="id" length="8">
         <generator class="native"/>
      </id>
   </class>
</hibernate-mapping>

2005-02-10 18:44:09,906 INFO net.sf.hibernate.cfg.Environment - Hibernate 2.1.5
2005-02-10 18:44:09,906 INFO net.sf.hibernate.cfg.Environment - loaded properties from resource hibernate.properties: {hibernate.transaction.flush_before_completion=, hibernate.connection.autocommit=true, hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver, hibernate.cglib.use_reflection_optimizer=true, hibernate.cache.provider_class=net.sf.hibernate.cache.HashtableCacheProvider, hibernate.cache.use_query_cache=true, hibernate.max_fetch_depth=1, hibernate.dialect=net.sf.hibernate.dialect.Oracle9Dialect, hibernate.jdbc.use_streams_for_binary=true, hibernate.jdbc.batch_size=0, hibernate.query.substitutions=true 1, false 0, yes 'Y', no 'N', hibernate.connection.username=XXXXXX, hibernate.cache.region_prefix=hibernate.test, hibernate.connection.url=jdbc:oracle:thin:@XXXXXX:1521:Test, hibernate.show_sql=true, hibernate.connection.password=password, hibernate.connection.pool_size=1}
2005-02-10 18:44:09,921 INFO net.sf.hibernate.cfg.Environment - using java.io streams to persist binary types
2005-02-10 18:44:09,921 INFO net.sf.hibernate.cfg.Environment - using CGLIB reflection optimizer
2005-02-10 18:44:09,921 INFO net.sf.hibernate.cfg.Configuration - Mapping resource: test/TestClass.hbm.xml
2005-02-10 18:44:10,062 DEBUG net.sf.hibernate.util.DTDEntityResolver - trying to locate http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd in classpath under net/sf/hibernate/
2005-02-10 18:44:10,062 DEBUG net.sf.hibernate.util.DTDEntityResolver - found http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd in classpath
2005-02-10 18:44:10,234 INFO net.sf.hibernate.cfg.Binder - Mapping class: au.com.sensis.bidsmart.business.campaign.TestClass -> TestClass
2005-02-10 18:44:10,328 DEBUG net.sf.hibernate.cfg.Binder - Mapped property: id -> id, type: long
2005-02-10 18:44:10,343 INFO net.sf.hibernate.cfg.Configuration - processing one-to-many association mappings
2005-02-10 18:44:10,343 INFO net.sf.hibernate.cfg.Configuration - processing one-to-one association property references
2005-02-10 18:44:10,343 INFO net.sf.hibernate.cfg.Configuration - processing foreign key constraints
2005-02-10 18:44:10,375 INFO net.sf.hibernate.dialect.Dialect - Using dialect: net.sf.hibernate.dialect.Oracle9Dialect
2005-02-10 18:44:10,375 INFO net.sf.hibernate.cfg.SettingsFactory - Maximim outer join fetch depth: 1
2005-02-10 18:44:10,375 INFO net.sf.hibernate.cfg.SettingsFactory - Use outer join fetching: true
2005-02-10 18:44:10,375 INFO net.sf.hibernate.connection.DriverManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!)
2005-02-10 18:44:10,375 INFO net.sf.hibernate.connection.DriverManagerConnectionProvider - Hibernate connection pool size: 1
2005-02-10 18:44:10,453 INFO net.sf.hibernate.connection.DriverManagerConnectionProvider - using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@XXXXXX:1521:Test
2005-02-10 18:44:10,453 INFO net.sf.hibernate.connection.DriverManagerConnectionProvider - connection properties: {user=XXXXXX, password=password, autocommit=true}
2005-02-10 18:44:10,468 INFO net.sf.hibernate.transaction.TransactionManagerLookupFactory - No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
2005-02-10 18:44:10,468 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - total checked-out connections: 0
2005-02-10 18:44:10,468 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - opening new JDBC connection
2005-02-10 18:44:10,984 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - created connection to: jdbc:oracle:thin:@XXXXXXX:1521:TEst, Isolation Level: 2
2005-02-10 18:44:11,031 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - returning connection to pool, pool size: 1
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - Use scrollable result sets: true
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - Use JDBC3 getGeneratedKeys(): false
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - Optimize cache for minimal puts: false
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - echoing all SQL to stdout
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - Query language substitutions: {no='N', true=1, yes='Y', false=0}
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - cache provider: net.sf.hibernate.cache.HashtableCacheProvider
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.SettingsFactory - query cache factory: net.sf.hibernate.cache.StandardQueryCacheFactory
2005-02-10 18:44:11,031 INFO net.sf.hibernate.cfg.Configuration - instantiating and configuring caches
2005-02-10 18:44:11,187 INFO net.sf.hibernate.impl.SessionFactoryImpl - building session factory
2005-02-10 18:44:11,187 DEBUG net.sf.hibernate.impl.SessionFactoryImpl - instantiating session factory with properties: {java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition, hibernate.connection.password=password, hibernate.cache.provider_class=net.sf.hibernate.cache.HashtableCacheProvider, sun.boot.library.path=C:\j2sdk1.4.2\jre\bin, java.vm.version=1.4.2-b28, hibernate.connection.username=XXXXXX, java.vm.vendor=Sun Microsystems Inc., java.vendor.url=http://java.sun.com/, path.separator=;, hibernate.cache.use_query_cache=true, java.vm.name=Java HotSpot(TM) Client VM, file.encoding.pkg=sun.io, user.country=AU, sun.os.patch.level=Service Pack 1, java.vm.specification.name=Java Virtual Machine Specification, user.dir=D:\bidsmart\workspace\Getsmart, java.runtime.version=1.4.2-b28, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, java.endorsed.dirs=C:\j2sdk1.4.2\jre\lib\endorsed, os.arch=x86, hibernate.connection.autocommit=true, java.io.tmpdir=D:\DOCUME~1\w75878\LOCALS~1\Temp\, line.separator=
, java.vm.specification.vendor=Sun Microsystems Inc., user.variant=, os.name=Windows XP, sun.java2d.fontpath=, hibernate.cache.region_prefix=hibernate.test, java.library.path=C:\j2sdk1.4.2\bin;.;C:\WINDOWS\System32;C:\WINDOWS;C:\Apps\Ora81X\Bin;C:\Program Files\Oracle\jre\1.1.7\Bin;C:\Apps\OraNt\Bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\system32\nls;C:\WINDOWS\system32\nls\ENGLISH;c:\Program Files\Novell\ZENworks\;C:\j2sdk1.4.2\bin;Z:., java.specification.name=Java Platform API Specification, java.class.version=48.0, hibernate.connection.pool_size=1, java.util.prefs.PreferencesFactory=java.util.prefs.WindowsPreferencesFactory, os.version=5.1, user.home=D:\Documents and Settings\XXXXXX, user.timezone=Australia/Sydney, java.awt.printerjob=sun.awt.windows.WPrinterJob, file.encoding=Cp1252, java.specification.version=1.4, hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver, java.class.path=XXXuser.name=XXXX, hibernate.query.substitutions=true 1, false 0, yes 'Y', no 'N', hibernate.show_sql=true, java.vm.specification.version=1.0, java.home=C:\j2sdk1.4.2\jre, sun.arch.data.model=32, hibernate.dialect=net.sf.hibernate.dialect.Oracle9Dialect, hibernate.connection.url=jdbc:oracle:thin:@XXXXX:1521:Test, user.language=en, java.specification.vendor=Sun Microsystems Inc., awt.toolkit=sun.awt.windows.WToolkit, hibernate.cglib.use_reflection_optimizer=true, java.vm.info=mixed mode, hibernate.transaction.flush_before_completion=, hibernate.jdbc.use_streams_for_binary=true, java.version=1.4.2, java.ext.dirs=C:\j2sdk1.4.2\jre\lib\ext, sun.boot.class.path=C:\j2sdk1.4.2\jre\lib\rt.jar;C:\j2sdk1.4.2\jre\lib\i18n.jar;C:\j2sdk1.4.2\jre\lib\sunrsasign.jar;C:\j2sdk1.4.2\jre\lib\jsse.jar;C:\j2sdk1.4.2\jre\lib\jce.jar;C:\j2sdk1.4.2\jre\lib\charsets.jar;C:\j2sdk1.4.2\jre\classes, java.vendor=Sun Microsystems Inc., hibernate.jdbc.batch_size=0, file.separator=\, java.vendor.url.bug=http://java.sun.com/cgi-bin/bugreport.cgi, sun.io.unicode.encoding=UnicodeLittle, sun.cpu.endian=little, hibernate.max_fetch_depth=1, sun.cpu.isalist=pentium i486 i386}
2005-02-10 18:44:11,562 DEBUG net.sf.hibernate.impl.SessionFactoryObjectFactory - initializing class SessionFactoryObjectFactory
2005-02-10 18:44:11,578 DEBUG net.sf.hibernate.impl.SessionFactoryObjectFactory - registered: 21f5972501fb39990101fb399b2a0000 (unnamed)
2005-02-10 18:44:11,578 INFO net.sf.hibernate.impl.SessionFactoryObjectFactory - Not binding factory to JNDI, no JNDI name configured
2005-02-10 18:44:11,578 DEBUG net.sf.hibernate.impl.SessionFactoryImpl - instantiated session factory
2005-02-10 18:44:11,578 INFO net.sf.hibernate.cache.UpdateTimestampsCache - starting update timestamps cache at region: net.sf.hibernate.cache.UpdateTimestampsCache
2005-02-10 18:44:11,578 INFO net.sf.hibernate.cache.StandardQueryCache - starting query cache at region: net.sf.hibernate.cache.StandardQueryCache
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.impl.SessionImpl - opened session
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.impl.BatcherImpl - about to open: 0 open PreparedStatements, 0 open ResultSets
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - total checked-out connections: 0
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - using pooled JDBC connection, pool size: 0
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.SQL - select hibernate_sequence.nextval from dual
Hibernate: select hibernate_sequence.nextval from dual
2005-02-10 18:44:11,734 DEBUG net.sf.hibernate.impl.BatcherImpl - preparing statement
2005-02-10 18:44:11,796 DEBUG net.sf.hibernate.id.SequenceGenerator - Sequence identifier generated: 2
2005-02-10 18:44:11,796 DEBUG net.sf.hibernate.impl.BatcherImpl - done closing: 0 open PreparedStatements, 0 open ResultSets
2005-02-10 18:44:11,796 DEBUG net.sf.hibernate.impl.BatcherImpl - closing statement
2005-02-10 18:44:11,796 DEBUG net.sf.hibernate.impl.SessionImpl - generated identifier: 2
2005-02-10 18:44:11,796 DEBUG net.sf.hibernate.impl.SessionImpl - saving [au.com.sensis.bidsmart.business.campaign.TestClass#2]
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - flushing session
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - Flushing entities and processing referenced collections
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - Processing unreferenced collections
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - Scheduling collection removes/(re)creates/updates
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - Flushed: 1 insertions, 0 updates, 0 deletions to 1 objects
2005-02-10 18:44:11,812 DEBUG net.sf.hibernate.impl.SessionImpl - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.Printer - listing entities:
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.Printer - au.com.sensis.bidsmart.business.campaign.TestClass{id=2}
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.SessionImpl - executing flush
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.persister.EntityPersister - Inserting entity: [test.TestClass#2]
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.BatcherImpl - about to open: 0 open PreparedStatements, 0 open ResultSets
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.SQL - insert into TestClass (id) values (?)
Hibernate: insert into TestClass (id) values (?)
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.BatcherImpl - preparing statement
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.persister.EntityPersister - Dehydrating entity: [test.TestClass#2]
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.type.LongType - binding '2' to parameter: 1
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.BatcherImpl - done closing: 0 open PreparedStatements, 0 open ResultSets
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.BatcherImpl - closing statement
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.SessionImpl - post flush
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.SessionImpl - closing session
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.SessionImpl - disconnecting session
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.connection.DriverManagerConnectionProvider - returning connection to pool, pool size: 1
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.impl.SessionImpl - transaction completion
2005-02-10 18:44:11,828 DEBUG net.sf.hibernate.cache.UpdateTimestampsCache - Invalidating space [TestClass]