为什么@Documented注释具有运行时保留? [英] Why does @Documented annotation have runtime retention?

问题描述

我知道，@Documented批注仅由javadoc生成器使用以从源生成javadocs.因此保留类型应为SOURCE，但应为RUNTIME.为什么?

As I know, @Documented annotation is used only by javadoc generator to generate javadocs from sources. So retention type should be SOURCE, but it's RUNTIME. Why?

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.ANNOTATION_TYPE)
public @interface Documented {
}

推荐答案

无法解释@Documented为什么需要运行时保留的IMO

IMO that does not explain why @Documented needs runtime retention

是的，确实如此.可以说我运送了一个没有源文件的jar文件.用户可以仅使用类文件中的信息来构建适当的javadoc，因为类文件具有适当的批注的原因是它们是RetentionPolicy.RUNTIME.

Yes, it does. Lets say I ship a jar file without the sources. A user can build a proper javadoc using only information from classfiles the the reason that classfile have proper annotations is becase they are RetentionPolicy.RUNTIME.

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