Hy,

I am a beginner in Hibernate and I have a problem. I have to tables, PERSON and CONTACT, in table person I have a person_id primary key, and in Contact I have a person_person_id foreign key which points to Person table. If I want to do an eager fetching I can use the following code:

Session session = HibernateSession.currentSession();

List list = session.createCriteria(Person.class)
.setFetchMode("contacts", FetchMode.EAGER)
.list();
In this mode I obtain a list of Person object with collection contacts already fetching from the database. Problem is and also the documentation say that I can't fetching more than one collection. Also I have the possibility to make a select explicit(inner join) and obtain a List of touple. I want to ask if is possibility to obtain more than one collections using eager fetching and if so give me some example code.

No, not in a single outer join. This would be a Cartesian product, and in most cases worse than an immediate second select (which is what you will get if it is not mapped lazy).

Is that meaning the following joining of "address" will not work ?

You can pre-fetch as many one-to-one and many-to-one associations as you'd like. to-many associations are limited to one fetch per query for the very reason Christian describes.