Hibernate @OneToOne Unidirectional Bidirectional

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One-to-One Unidirectional Relationship
Since you’ve already learned about the ins and outs of how unidirectional
one-to-many and bidirectional one-to-many relationships work, it’s time to learn
about the One-to-One relationships.
We will start things off with the unidirectional One-to-One relationship and how
it’s set up in Hibernate.
First thing is first, you need to understand how a One-to-One relationship is
actually set up in a database. Once you understand that the child table declares
the parent’s primary key as the child’s primary key, then we can get moving with
the Hibernate stuff!
For this example, we are going to use the One-to-One relationship between
an Employee and their Address. TheAddress table will be set up as follows:
For more information, please read the show notes