table of Contents
One, custom annotation grammatical structure
Second, the attribute syntax structure
One, custom annotation grammatical structure
Second, the attribute syntax structure
Example:
Note :
(1) An annotation attribute has no default value by default . If an annotation attribute with no default value is defined in the annotation, the value must be specified when using the annotation :
No default value
If the annotation value attribute has no default and no specific value is set when used, the code syntax will not pass.
(2) If the annotation attribute is named value , you can directly assign a value when using the annotation
Direct assignment {"deprecation"}
(3) If the annotation data type of the attribute is an array type , must be used when a value more than {} enclosed ; but if only assigned a value, instead of using {} :
