ElementType.FIELD
时间: 2023-03-01 10:22:52 浏览: 118
`ElementType.FIELD` is an enumerated constant in the `java.lang.annotation.ElementType` enumeration. It represents the type of an element that can be annotated with an annotation in the Java programming language.
The possible values of `ElementType` are:
- `TYPE`: Represents a class, interface, enumeration or annotation type declaration.
- `FIELD`: Represents a field or property in a class.
- `METHOD`: Represents a method in a class.
- `PARAMETER`: Represents a parameter in a method or constructor.
- `CONSTRUCTOR`: Represents a constructor in a class.
- `LOCAL_VARIABLE`: Represents a local variable in a method.
- `ANNOTATION_TYPE`: Represents an annotation type declaration.
- `PACKAGE`: Represents a package declaration.
The `ElementType` enumeration is used in conjunction with the `@Target` annotation, which specifies the elements of a program to which an annotation can be applied. For example, if you have an annotation `MyAnnotation` and you want to specify that it can be applied to fields only, you would write:
```
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface MyAnnotation {
// ...
}
```
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