bidirectionnal « Association « JPA Q&A

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1. Hibernate: cannot delete parent object in a bidirectionnal association    stackoverflow.com

I have a bi-directional association between two tables parent and child 

<class name="child" table="child">
      <id name="id" column="id" />
      <many-to-one name="parent_id" column="parent_id" 
 ...

2. Bidirectionnal association using a join table with hib2    forum.hibernate.org

3. Two bidirectionnal associations of the same type    forum.hibernate.org

4. Bidirectionnal Association one to many / many to one    forum.hibernate.org

Hello, I follow 7.4.1 example in online documentation : How is multiplicity handled in POJO's ? Can i have in Person : Set and in Adress : Set ??? Thans for ...