import java
.lang.annotation.ElementType
import java
.lang.annotation.Repeatable
import java
.lang.annotation.Retention
import java
.lang.annotation.RetentionPolicy
import java
.lang.annotation.Target
public class Annotations1 {
@Target({ElementType
.TYPE_PARAMETER, ElementType
.TYPE_USE})
@interface MyAnnotation {
}
@Retention(RetentionPolicy
.RUNTIME)
@interface Hints {
Hint[] value()
}
@Repeatable(Hints
.class)
@Retention(RetentionPolicy
.RUNTIME)
@interface Hint {
String value()
}
@Hint(
"hint1")
@Hint(
"hint2")
class Person {
}
public static void main(String[] args) {
Hint hint = Person
.class.getAnnotation(Hint
.class)
System
.out.println(hint)
Hints hints1 = Person
.class.getAnnotation(Hints
.class)
System
.out.println(hints1
.value()
.length)
Hint[] hints2 = Person
.class.getAnnotationsByType(Hint
.class)
System
.out.println(hints2
.length)
}
}
转载于:https://www.cnblogs.com/bilaisheng/p/10210911.html
相关资源：annotations-java8.jar
