I\'m trying to setup JDK in IntelliJ IDEA and whatever I do, or whatever JDK version I select, nothing happens. The following situation remains:
For someone like me, looking for a way to setup an offline documentation in IDEA on UBUNTU Linux. You should install the openjdk-8-doc (or openjdk-X-doc in general case) package, then go to File|Project Structure|SDKs|1.8(still 1.X in general), then select tab Documentation Paths and add the path /usr/lib/jvm/java-1.8.0-openjdk-amd64/docs/api there.
Note, that path of Java docs installation may differ on your machine. You are able to check the path of Java docs installation executing dpkg-query -L openjdk-8-doc | less in a shell.