关于注解的问题 - 黑马程序员技术交流社区

import java.lang.annotation.*;
@NewAnnotation({1,2,3,4,5})
class AnnotationTest
{
//@NewAnnotation(value = "你不好" /*, lamp = EnumTest.L*/ , annotationAttr = @EleAnnotation("李四"))
public static void main(String[] args)
{
if(AnnotationTest.class.isAnnotationPresent(NewAnnotation.class))
{
NewAnnotation annotation = (NewAnnotation)AnnotationTest.class.getAnnotation(NewAnnotation.class);
//System.out.println(annotation.value());
//System.out.println(annotation.arrayAttr().length);
//System.out.println(annotation.printClass());
}
}
}
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE , ElementType.METHOD })
@interface NewAnnotation
{
//String value() default "你好";
String[] arrayAttr();
//EnumTest lamp() default EnumTest.H;
//EleAnnotation annotationAttr() ;
//Class printClass() default String.class;
}
@interface EleAnnotation
{
String value();
}

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