package test;


import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import org.hibernate.annotations.Entity;


@Entity
public class Address {
   
   @Id
   @GeneratedValue(strategy=GenerationType.AUTO)
   private int id;
   
   private String street;
   private String state;
   private String zipCode;
   private String city;
   private String aptNumber;
//get and setters
}

package test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

public class Main {
   
   public static void main(String args[]) {
                        
      new Main().addAddress();
      
   }
   
   public void addAddress() {
      
      
            
      AnnotationConfiguration cfg = new AnnotationConfiguration();
      
      cfg.setProperty("hibernate.dialect","org.hibernate.dialect.MySQLDialect");
      cfg.setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");
      cfg.setProperty("hibernate.connection.url", "jdbc:mysql://localhost/test");
      cfg.setProperty("hibernate.current_session_context_class", "thread");
      cfg.setProperty("hibernate.connection.username", "root");
      cfg.setProperty("hibernate.connection.password", "alex");
      cfg.setProperty("hibernate.show_sql", "true");
      cfg.setProperty("hibernate.hbm2ddl.auto", "true");                  
      
      cfg.addAnnotatedClass(test.Address.class);
            
      SessionFactory sessionFactory = cfg.buildSessionFactory();
      
      Session session = sessionFactory.getCurrentSession();
      
      session.beginTransaction();
      test.Address address = new test.Address();
      
      session.save(address);
      
      session.getTransaction().commit();
      
      sessionFactory.close();
      
                  
   }
   
}

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.annotations.Version).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.hibernate.MappingException: Unknown entity: test.Address
   at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:514)
   at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1302)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:89)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
   at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:530)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:514)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
   at $Proxy4.save(Unknown Source)
   at test.Main.addAddress(Main.java:41)
   at test.Main.main(Main.java:12)

16:56:25,867  INFO Version:15 - Hibernate Annotations 3.4.0.CR2
16:56:25,889  INFO Environment:543 - Hibernate 3.3.0.GA
16:56:25,894  INFO Environment:576 - hibernate.properties not found
16:56:25,901  INFO Environment:709 - Bytecode provider name : javassist
16:56:25,909  INFO Environment:627 - using JDK 1.4 java.sql.Timestamp handling
16:56:26,007  INFO Version:14 - Hibernate Commons Annotations 3.1.0.CR2
16:56:26,011  INFO Configuration:1460 - configuring from resource: /hibernate.cfg.xml
16:56:26,012  INFO Configuration:1437 - Configuration resource: /hibernate.cfg.xml
16:56:26,146  INFO Configuration:1575 - Configured SessionFactory: null
16:56:26,147 DEBUG InitSessionFactory:41 - add class - cfg.addAnnotatedClass(Terrarium.class);
16:56:26,166  INFO HibernateSearchEventListenerRegister:53 - Unable to find org.hibernate.search.event.FullTextIndexEventListener on the classpath. Hibernate Search is not enabled.
16:56:26,271  INFO AnnotationConfiguration:369 - Hibernate Validator not found: ignoring
16:56:26,278  INFO DriverManagerConnectionProvider:64 - Using Hibernate built-in connection pool (not for production use!)
16:56:26,278  INFO DriverManagerConnectionProvider:65 - Hibernate connection pool size: 20
16:56:26,281  INFO DriverManagerConnectionProvider:68 - autocommit mode: false
16:56:26,301  INFO DriverManagerConnectionProvider:103 - using driver: org.postgresql.Driver at URL: jdbc:postgresql://localhost:5432/testdb
16:56:26,302  INFO DriverManagerConnectionProvider:109 - connection properties: {user=testuser, password=****}
16:56:26,449  INFO SettingsFactory:116 - RDBMS: PostgreSQL, version: 8.3.3
16:56:26,450  INFO SettingsFactory:117 - JDBC driver: PostgreSQL Native Driver, version: PostgreSQL 8.3 JDBC3 with SSL (build 603)
16:56:26,468  INFO Dialect:175 - Using dialect: org.hibernate.dialect.PostgreSQLDialect
16:56:26,533  INFO TransactionFactoryFactory:62 - Transaction strategy: org.hibernate.transaction.JDBCTransactionFactory
16:56:26,536  INFO TransactionManagerLookupFactory:80 - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
16:56:26,536  INFO SettingsFactory:170 - Automatic flush during beforeCompletion(): disabled
16:56:26,540  INFO SettingsFactory:174 - Automatic session close at end of transaction: disabled
16:56:26,541  INFO SettingsFactory:181 - JDBC batch size: 15
16:56:26,542  INFO SettingsFactory:184 - JDBC batch updates for versioned data: disabled
16:56:26,543  INFO SettingsFactory:189 - Scrollable result sets: enabled
16:56:26,543  INFO SettingsFactory:197 - JDBC3 getGeneratedKeys(): disabled
16:56:26,544  INFO SettingsFactory:205 - Connection release mode: auto
16:56:26,545  INFO SettingsFactory:232 - Default batch fetch size: 1
16:56:26,546  INFO SettingsFactory:236 - Generate SQL with comments: disabled
16:56:26,546  INFO SettingsFactory:240 - Order SQL updates by primary key: disabled
16:56:26,546  INFO SettingsFactory:244 - Order SQL inserts for batching: disabled
16:56:26,547  INFO SettingsFactory:420 - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
16:56:26,555  INFO ASTQueryTranslatorFactory:47 - Using ASTQueryTranslatorFactory
16:56:26,556  INFO SettingsFactory:252 - Query language substitutions: {}
16:56:26,557  INFO SettingsFactory:257 - JPA-QL strict compliance: disabled
16:56:26,557  INFO SettingsFactory:262 - Second-level cache: enabled
16:56:26,557  INFO SettingsFactory:266 - Query cache: disabled
16:56:26,562  INFO SettingsFactory:405 - Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge
16:56:26,562  INFO RegionFactoryCacheProviderBridge:61 - Cache provider: org.hibernate.cache.EhCacheProvider
16:56:26,569  INFO SettingsFactory:276 - Optimize cache for minimal puts: disabled
16:56:26,569  INFO SettingsFactory:285 - Structured second-level cache entries: disabled
16:56:26,580  INFO SettingsFactory:314 - Statistics: disabled
16:56:26,580  INFO SettingsFactory:318 - Deleted entity synthetic identifier rollback: disabled
16:56:26,582  INFO SettingsFactory:333 - Default entity-mode: pojo
16:56:26,582  INFO SettingsFactory:337 - Named query checking : enabled
16:56:26,707  INFO SessionFactoryImpl:187 - building session factory
16:56:26,739 DEBUG CacheManager:239 - Configuring ehcache from classpath.
16:56:26,745  WARN ConfigurationFactory:127 - No configuration found. Configuring ehcache from ehcache-failsafe.xml  found in the classpath: jar:file:/home/adi/workspace/jars/hibernate/ehcache-1.2.3.jar!/ehcache-failsafe.xml
16:56:26,746 DEBUG ConfigurationFactory:87 - Configuring ehcache from URL: jar:file:/home/adi/workspace/jars/hibernate/ehcache-1.2.3.jar!/ehcache-failsafe.xml
16:56:26,747 DEBUG ConfigurationFactory:139 - Configuring ehcache from InputStream
16:56:26,773 DEBUG DiskStoreConfiguration:65 - Disk Store Path: /tmp
16:56:26,789 DEBUG ConfigurationHelper:208 - No CacheManagerEventListenerFactory class specified. Skipping...
16:56:26,790 DEBUG ConfigurationHelper:183 - No CachePeerListenerFactoryConfiguration specified. Not configuring a CacheManagerPeerListener.
16:56:26,790 DEBUG ConfigurationHelper:159 - No CachePeerProviderFactoryConfiguration specified. Not configuring a CacheManagerPeerProvider.
16:56:26,802 DEBUG ConfigurationHelper:135 - No BootstrapCacheLoaderFactory class specified. Skipping...
16:56:26,812  INFO SessionFactoryObjectFactory:105 - Not binding factory to JNDI, no JNDI name configured
16:56:26,854  INFO SchemaExport:226 - Running hbm2ddl schema export
16:56:26,855  INFO SchemaExport:251 - exporting generated schema to database
16:56:26,873  INFO SchemaExport:268 - schema export complete
Exception in thread "main" org.hibernate.MappingException: Unknown entity: de.budisantoso.test.Terrarium
   at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:580)
   at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1365)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:121)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
   at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
   at $Proxy5.save(Unknown Source)
   at de.budisantoso.test.RunHibernateTest.createTerrarium(RunHibernateTest.java:40)
   at de.budisantoso.test.RunHibernateTest.main(RunHibernateTest.java:21

...

import javax.persistemce.Entity;

import java.io.Serializable;

import javax.persistence.Entity
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.SequenceGenerator;

@Entity
@org.hibernate.annotations.Entity(mutable=true, dynamicInsert=true, dynamicUpdate=true)
@SequenceGenerator(name="myclass_seq", sequenceName="myclass_id_seq")
public class MyClass implements Serializable {

    private static final long serialVersionUID = 7628430776579817658L;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "myclass_seq")
    private Long id;
    private String name;

// ...

}