How to open Javadoc JAR file in web browser
- Rename the file spring-graphql-common-2.1.0-2016-05-22T16-50-32-javadoc.jar to spring-graphql-common-2.1.0-2016-05-22T16-50-32-javadoc.zip
- Use your favourite unzip tool (WinRAR / WinZIP) to extract it, now you have a folder spring-graphql-common-2.1.0-2016-05-22T16-50-32-javadoc
- Double click index.html will open the index page on your default web browser.
How to generate Javadoc from a source JAR?
Running the command javadoc:
javadoc --ignore-source-errors -encoding UTF-8 -sourcepath "spring-graphql-common-2.1.0-2016-05-22T16-50-32-sources.jar" -d "spring-graphql-common-2.1.0-2016-05-22T16-50-32-javadoc" -subpackages 
