Annotations and Annotation Types : Annotations Types « Language « Java Tutorial






  1. Java Tutorial
  2. Language
  3. Annotations Types

Annotations are notes in Java programs to instruct the Java compiler to do something. Java provides three standard annotations and four standard meta-annotations.

  1. An annotation type is a special interface type.
  2. An annotation is an instance of an annotation type.
  3. An annotation type has a name and members.
  4. The information contained in an annotation takes the form of key/value pairs.
  5. There can be zero or multiple pairs and each key has a specific type.
  6. It can be a String, int, or other Java types.
  7. Annotation types with no key/value pairs are called marker annotation types.
  8. Those with one key/value pair are referred to single-value annotation types.
  1. There are three annotation types in Java 5: Deprecated, Override, and Suppress Warnings.
  2. There are four other annotation types that are part of the java.lang.annotation package: Documented, Inherited, Retention, and Target.
  3. These four annotation types are used to annotate annotations,








1.13.Annotations Types
1.13.1.Annotations and Annotation Types
1.13.2.The Annotation Interface
1.13.3.Using Default Values
1.13.4.Marker Annotations
1.13.5.Single-Member Annotations
1.13.6.Creates and uses a single-member annotation
1.13.7.The single-value syntax
1.13.8.Some Restrictions
1.13.9.A marker annotation