Summary

Provide a --version option for the javadoc tool.

Problem

Although the javadoc tool provides a -version option, that is a flag to indicate whether the generated documents should include the version of the API being documented, from the @version tags. There has never been a flag to obtain the tool version itself.

Solution

With the introduction of -- options in JDK 9, --version can be provided to output the version information of the tool.

Specification

When --version is used, javadoc will report the version of the tool and exit.