What is the definition of java meta-annotation?

1. Concept

Meta-annotations are annotations used to modify annotations, usually used for the definition of annotations.

2. Type

@Target: The target of the annotation.

@Retention: Annotation life cycle.

@Documented: Whether the comment should be included in the JavaDoc document.

@Inherited: Whether subclasses are allowed to inherit annotations.

3. Example

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.SOURCE)
public @interface Override {
 
}

What are the basic data types of java

The basic data types of Java are divided into:

1. Integer type, used to represent the data type of integers.

2. Floating point type, a data type used to represent decimals.

3. Character type. The keyword of character type is "char".

4. Boolean type is the basic data type that represents logical values.

The above is the detailed content of What is the definition of java meta-annotation?. For more information, please follow other related articles on the PHP Chinese website!