```
@Target(value=ANNOTATION_TYPE)
 @Retention(value=RUNTIME)
 @Documented
public @interface Qualifier
```
Identifies qualifier annotations. Anyone can define a new qualifier. A qualifier annotation:
- is annotated with @Qualifier, @Retention(RUNTIME), and typically @Documented.
- can have attributes.
- may be part of the public API, much like the dependency type, but unlike implementation types which needn't be part of the public API.
- may have restricted usage if annotated with @Target. While this specification covers applying qualifiers to fields and parameters only, some injector configurations might use qualifier annotations in other places (on methods or classes for example).
For example:
```
   @java.lang.annotation.Documented
   @java.lang.annotation.Retention(RUNTIME)
   @javax.inject.Qualifier
   public @interface Leather {
     Color color() default Color.TAN;
     public enum Color { RED, BLACK, TAN }
   }
```
See Also:

@Named

Document created the 11/06/2005, last modified the 18/08/2025
Source of the printed document:https://www.gaudry.be/en/java-api-javaee-rf-javax/inject/Qualifier.html

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References

Manuel PHP : https://docs.oracle.com

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Annotation Type Qualifier

References