Java: Value Objects

Value objects improve domain code by introducing specific, meaningful types that encapsulate both data and behavior.

Using value objects allows you to replace primitive data types like strings and integers with domain-specific types. This leads to clearer, more understandable code, as these types carry explicit meaning within the domain. For example, instead of using a raw string for an email address, you could create an 'Email' value object that not only stores the email address but also validates its format upon creation. This encapsulation ensures correctness and reduces repetitive validation code throughout your application.