Java 获取注解在哪些类上使用

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;

public class AnnotationExample {

    @MyAnnotation
    public void myMethod() {
        // do something
    }

    public static void main(String[] args) {
        try {
            // 获取AnnotationExample类的Class对象
            Class<?> clazz = AnnotationExample.class;

            // 获取myMethod方法的Method对象
            Method method = clazz.getMethod("myMethod");

            // 获取myMethod方法上的所有注解
            Annotation[] annotations = method.getAnnotations();

            // 遍历所有注解
            for (Annotation annotation : annotations) {
                // 判断注解类型是否为MyAnnotation
                if (annotation instanceof MyAnnotation) {
                    System.out.println("MyAnnotation is used on " + clazz.getName());
                }
            }
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
    }
}

// 定义一个自定义注解
@interface MyAnnotation {
}

MyAnnotation is used on AnnotationExample