Hi Volks,
I encountered a problem while trying to setup Hibernate and Postgresql on Eclipse. The following Exception was obtained when i tried to run the java code:

Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/Cacheable
at org.hibernate.cfg.AnnotationBinder.determineCacheSettings(AnnotationBinder.java:953)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:596)
at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:636)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:359)
at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:838)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:128)
at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaExport.java:91)
at com.hibernate.chapter1.TestEmployee.main(TestEmployee.java:16)
Caused by: java.lang.ClassNotFoundException: javax.persistence.Cacheable
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 8 more

Well here is some more inside on what i did.
Firstly, i started by installing my postgresql 8.4 and successfully linked it with Eclipse over the Database Development Interface.
Then i went ahead to link up Eclipse and Hibernate by creating a User Library containing the following jar files:
* hibernate3.jar
* antlr-2.7.6.jar
* commons-collections-3.1.jar
* dom4j-1.6.1.jar
* javassist.3.9.0.GA.jar
* jta.1.1.jar
* slf4j-api-1.5.8.jar
* cglib-2.2.jar
* hibernate-annotations.jar
* ejb3-persistence.jar
* hibernate-commons-annotations.jar
* log4j.jar
* slf4j-log4j12.jar
* postgresql-8.4-701.jdbc4.jar

Furthermore, i created a connection between hibernate and the database by configuring the hibernate.cfg.xml file using my right database configuration parameters.

Well , i hope for help. I don't know what else to do about this Exception.
Thanks for showing some concern.

I got the same exact error. Got it resolved by adding jpa-api-2.0-cr-1.jar in the build path. Got the jar from http://repository.jboss.org/maven2/org/ ... i/2.0-cr-1

Hope this helps.

Thank you so much sir...
Adding that jar file resolved the problem like a charm.
More to that, there was also an issue with the configuration file, which i also resolved by adding the path to localhost.
Now real work can begin...
Thanks again for the .jar file (link).