JPA - @JoinColumn with @OneToOne Example

This example shows how to use @JoinColumn to specify a foreign-key column name for the table of the source entity of a one-to-one relationship.

Example Project

Dependencies and Technologies Used:

• h2 1.4.193: H2 Database Engine.
• hibernate-core 5.2.8.Final: The core O/RM functionality as provided by Hibernate.
  Implements javax.persistence:javax.persistence-api version 2.1
• JDK 1.8
• Maven 3.3.9

Here's the output of MainExample.java

Output

--------
SHOW TABLES
[ENTITYA, PUBLIC]
[ENTITYB, PUBLIC]
--------
SHOW COLUMNS from EntityA
[MYIDA, INTEGER(10), NO, PRI, NULL]
[MY_JOIN_COLUMN, INTEGER(10), YES, , NULL]
--------
SHOW COLUMNS from EntityB
[MYIDB, INTEGER(10), NO, PRI, NULL]
[STRINGB, VARCHAR(255), YES, , NULL]

See also

JPA - OneToOne relationship