On Tue, Feb 10, 2009 at 7:33 AM, Ville Virtanen
<ville.virta...@cerion.fi> wrote:

> Sometimes if you want to assign the id an not let the DB do it for you it is
> good to be able to have null values. Also checkin whether the object is
> already saved can be achieved by just checking id != null.

Perfect explanation. Checking id != null is exactly what Hibernate
does when it wants to know if a given object exists in the database or
not.

> Primitive int defaults to zero without initialization?

Any Java primitive integer type defaults to zero without initialization.

-- 
Thiago

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