# Developing a new library: error while creating javadoc and some general question

**URL:** <https://discourse.processing.org/t/developing-a-new-library-error-while-creating-javadoc-and-some-general-question/13863>\
**Category:** Development\
**Created:** [September 7, 2019, 11:31am UTC](https://discourse.processing.org/t/developing-a-new-library-error-while-creating-javadoc-and-some-general-question/13863 "2019-09-07T11:31:43Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)\
**Post date:** [September 8, 2019, 12:50am UTC](https://discourse.processing.org/t/developing-a-new-library-error-while-creating-javadoc-and-some-general-question/13863/2 "2019-09-08T00:50:54Z")

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> [@fedpep](#):
>
> there’s an issue posted on GitHub but couldn’t find the solution.

> <https://github.com/processing/processing-library-template/issues/19>
>
> When I run the Processing template targeting Java SE-1.8, the 
> 
> \> \[javadoc\] Co…nstructing Javadoc information...
> \> \[javadoc\] Standard Doclet version 10.0.1
> \> \[javadoc\] Building tree for all the packages and classes...
> \> \[javadoc\] javadoc: error - Error - Exception java.lang.ClassNotFoundException thrown while trying to register Taglet ExampleTaglet...
> 
> In the Processing Library template there is a file
> 
> resources \> code \> ExampleTaglet.java
> 
> It begins with
> 
> import com.sun.tools.doclets.Taglet;
> 
> I think that in Java 8+ that would instead would be:
> 
> import java.jdk.Taglet;
> 
> ...I'm not sure if there are other changes that would need to be made.
> 
> I am not familiar with doclets and Taglets -- looking over the code, it isn't clear to me why ExampleTaglet would actually be used -- although is referenced in Ant's build.xml:
> 
> \<taglet name="ExampleTaglet" path="resources/code" /\>
> 
> Anyway, when it fails the documentation as a whole fails to build.
> 
> Assuming this is a problem for others, it seems like either ExampleTaglet should be fixed or it should be removed from build.xml to not block javadoc generation.
> 
> My solution was to remove the above \<taglet\> line from build.xml.

Here are two possible solutions:

1. remove this line from build.xml.

2. make sure that the Eclipse project is using Java 8 – not just targeting 8 but using a built-in Java 10 or 11. Under Your project \> Properties \> Java Build Path \> Libraries, confirm that you see JavaSE 1.8

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