Primary Key « JPA « Java Tutorial

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2. JPA
3. Primary Key

22.19.Primary Key
	22.19.1.	Use UUID As Primary Key
	22.19.2.	Use Current Milisecond As ID
	22.19.3.	Set Primary Key Join Column For Entities In Hierarchy
	22.19.4.	Set ID By Yourself
	22.19.5.	Not Nullable ID
	22.19.6.	ID Entity With Hash Code And Equals
	22.19.7.	Id Containing Relationship
	22.19.8.	Embedded Compound Primary Key
	22.19.9.	Define Extra Class For Compound Key