java faq

Thread's stop( ), suspend( ), and resume( ) methods.?
What are Wrapper classes?
Primitive data type Wrapper class byte Byte short Short int Integer long Long float Float double Double char Character boolean Boolean

  transient object in hibernate
object finalize method

A new instance of a a persistent class which is not associated with a Session, has no representation in the database and no identifier value is considered transient by Hibernate:

Person person = new Person();
person.setName("Foobar");
// person is in a transient state

A persistent instance has a representation in the database, an identifier value and is associated with a Session. You can make a transient instance persistent by associating it with a Session:

Long id = (Long) session.save(person);
// person is now in a persistent state

Now, if we close the Hibernate Session, the persistent instance will become a detached instance: it isn't attached to a Session anymore (but can still be modified and reattached to a new Session later though).