What is the definition of java meta-annotation?
- 王林forward
- 2023-04-29 08:46:06891browse
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.
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