Attaching additional javadoc in Intellij IDEA

Question

When I use quick documentaion lookup (Ctrl+Q) on j2ee classes or annotations in IDEA I only get an empty javadoc. It only contains the basics like class name.

How do

Answer 1

If using maven:

"right click on your pom.xml" -> "Maven" -> then choose "Download Sources and Documentation"

To avoid this in the future: "Preferences" -> "Build, Execution, Deployment" -> "Build Tools" -> "Maven" -> "Importing" -> Check the Automatically download Sources and Documentation boxes.

Credit to Yacov Schondorf and Stephen Boesch from Intellij user forums.