layout	title	folder	permalink	pumlid	categories	tags
pattern	Value Object	value-object	/patterns/value-object/	LSZ13SCm20NGLTe1RExTXX2KECBOmfza_VRQszDxDnVBNJFiTG9pVOY2dteqdBdbqf3XK4ULqQbPFWmEklZcikjgXvV9W8Olwhn-e9ijjOpjKW4fv2zgHgypktq1	Creational	Java Difficulty-Beginner

Intent

Provide objects which follow value semantics rather than reference semantics. This means value objects' equality are not based on identity. Two value objects are equal when they have the same value, not necessarily being the same object.

Applicability

Use the Value Object when

• you need to measure the objects' equality based on the objects' value

Real world examples

• java.util.Optional
• java.time.LocalDate
• joda-time, money, beans

Credits

• Patterns of Enterprise Application Architecture
• VALJOs - Value Java Objects : Stephen Colebourne's blog
• Value Object : Wikipedia