@Entity
The @Entity annotation is a Jakarta Persistence annotation that declares a Java class as a persistent entity mapped to stored data.
Java Persistence with Spring Data and Hibernate epub
The JPA annotation that declares a Java class as a persistent entity type.
- How it is used
- Marks domain-model classes as persistent so a JPA provider can load and store their instances.
- How deep it goes
- Works through the required identifier, default table and column names, field access, and runtime metadata reading; treats relationship mappings separately.
- Examples
- Uses an Item mapped to ITEM and a User with an embedded Address and a Bid collection.
- What you can do after
- Build it from scratch: declare an entity with `@Entity` and `@Id`, ready for mapping and persistence through JPA.
Read how Java Persistence with Spring Data and Hibernate epub explains @Entity →
Quarkus in Action
@Entity is a Jakarta Persistence annotation that declares a Java class to be a persistent entity.
- How it is used
- Declares a Java class as a persistent entity in a Quarkus Panache application.
- How deep it goes
- Defines the annotation within Panache, including generated identifiers and accessors, but defers general JPA mapping detail.
- Examples
- Uses a Reservation class with reservation dates, a car identifier, a user identifier, and an overlap-checking method.
- What you can do after
- Build it from scratch as a concise Panache entity with generated persistence boilerplate and optional custom identifier handling.
Related concepts
- entityconfigures · An entity is a distinct, identifiable person, object, event, or concept represented as a unit in a data, software, or semantic model.
- mapped superclasscontrasts with · A mapped superclass is a JPA superclass whose persistent properties are inherited by entity classes without the superclass itself being an entity.
- value objectcontrasts with · A value object is an object whose meaning and equality derive from its attribute values rather than an independent identity, typically with immutable state.
- embeddable typecontrasts with · An embeddable type is a persistence value-type class whose state is stored as part of an owning entity rather than having independent persistent identity.
- digital imageincludes · A digital image is visual content encoded as data, typically as a two-dimensional arrangement of pixels or equivalent visual elements.
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