javadoc: error - invalid flag: -d

[priyeshshah11]

Tried using javadoc-coverage with gradle as per the steps in the README.
Get the following error : javadoc: error - invalid flag: -d

Note: Running javdaoc without the coverage doclet works fine.

Is this a known issue? Couldn't find much support elsewhere.

[yixqiao]

I'm having the exact same problem.
Javadoc is also giving this warning:
javadoc: warning - The old Doclet and Taglet APIs in the packages com.sun.javadoc, com.sun.tools.doclets and their implementations are planned to be removed in a future JDK release. These components have been superseded by the new APIs in jdk.javadoc.doclet. Users are strongly recommended to migrate to the new APIs.

EDIT: it might be due to using Java 9 (see this issue).

[priyeshshah11]

I'm having the exact same problem.
Javadoc is also giving this warning:
javadoc: warning - The old Doclet and Taglet APIs in the packages com.sun.javadoc, com.sun.tools.doclets and their implementations are planned to be removed in a future JDK release. These components have been superseded by the new APIs in jdk.javadoc.doclet. Users are strongly recommended to migrate to the new APIs.

EDIT: it might be due to using Java 9 (see this issue).

I am using Java 11.

[yixqiao]

I got javadoc-coverage to work by using it within a Java 8 environment (I also usually use Java 11).
I happened to have a conda environment with Java 8, so I ran it within the environment, and everything worked as expected.
A better idea for using Java 8 would probably be using sdkman as described here.

[manoelcampos]

Hello guys, sorry for the late reply, but I'm been very busy these days.
This is an issue with newer JDK versions.
Check #12 for details.
Unfortunately, I do not have time to make the changes to support JDK9+.