How popular is Java nowadays?
Other services providing central access points to Javadoc:
Other search engines for artifacts:
Official improvements to Javadoc
JEPs concerning Javadoc:
A preview of the new Javadoc for Java 9. Here's the official documentation for Java 8, Java 7, Java 6 and Java 1.5.
Links for finding important Java projects and people
Javadoc can be hard to find: