Basics of Annotations – Annotations
25.1 Basics of Annotations Support for annotations is provided by the Annotation API, which is located in the java.lang.annotation package.…
Declaring Annotation Type Elements – Annotations
Declaring Annotation Type Elements The body of an annotation type declaration may contain declarations of annotation type elements. The syntax…
Defaults for Annotation Type Elements – Annotations
Defaults for Annotation Type Elements An annotation type element declaration can declare a default value for an element using the…
Applying Normal Annotations – Annotations
Applying Normal Annotations When a normal annotation is applied to a program element, in addition to the name of the…
Meta-Annotations – Annotations
25.4 Meta-Annotations Meta-annotations are annotations that can be applied on an annotation type declaration to specify various aspects of the…
The @Target Meta-Annotation 2 – Annotations
The target values of the ElementType constants from 1 to 10 in Table 25.2 indicate declaration contexts—that is, a context…
The @Target Meta-Annotation – Annotations
The @Target Meta-Annotation An annotation type declaration can specify the contexts in which the annotation is applicable. This is controlled…
The @FunctionalInterface Annotation – Annotations
The @FunctionalInterface Annotation The marker annotation @FunctionalInterface is designed to ensure that a given interface is indeed functional—that is, it…
The @SafeVarargs Annotation – Annotations
The @SafeVarargs Annotation The marker annotation @SafeVarargs is used to instruct the compiler to suppress unchecked warnings that would otherwise…
Processing Annotations 2 – Annotations
In Example 25.4, the method printTaskInfoAnnotation() at (1) in the TaskInfoAnnotationProcessor class can be used to specifically discover TaskInfo annotations…