记录自己使用注解的过程//Step1:定义注解@Target(ElementType.METHOD)@Retention(RetentionPolicy.RUNTIME)public@interfaceSimpleAnnotation{Stringvalue();}//Step2:在方法中使用publicclassUseAnnotation{@SimpleAnnotation(value="testStringValue")publicvoidtestMethod(){}}//第三步：获取使用了哪些方法publicclassLogicMain{publicstaticvoidmain(String[]args){ClassuseAnnotationClass=UseAnnotation。班级;for(Methodmethod:useAnnotationClass.getMethods()){SimpleAnnotationannotation=method.getAnnotation(SimpleAnnotation.class);if(null!=annotation){System.out.println("方法名称："+method.getName());System.out.println("值："+annotation.value());}}}}输出结果：MethodName:testMethodvalue:testStringValue//Step1:Defineannotation@Inherited@Retention(RetentionPolicy.RUNTIME)public@interfaceMyAnnotation{Stringvalue()default"hello";}//第二步：在父类上使用，子类继承该类@MyAnnotationpublicclassPerson{}classStudentextendsPerson{}//第三步：获取publicclassTestAnnotation{publicstaticvoidmain(String[]args){Classclazz=Student.class;Annotation[]annotations=clazz.getAnnotations();for(Annotationannotations:annotations){System.out.println(annotation);}}}输出结果：@com.zcl.edu.annotation2.MyAnnotation(value="hello")
