How to view JDK external documentation in IntelliJ IDEA?

The shortcut for this action is Shift+F1 but it is always grayed out even I have pointed JDK documentation path to the docs folder (the docs folder is unzipped from jdk-7u2-apidocs.zip ).
Thanks

Solution 1:

You need to specify the docs/api subdirectory of the unpacked documentation or use https://docs.oracle.com/javase/8/docs/api/ URL for the external documentation feature to work.

File -> Project Structure... then here :

Solution 2:

I'm using 10.5.4. It was unclear to me from the docs or from resources online that you need to add this at Project Structure > SDK's > (Choose your SDK) > Documentation Paths > Specify URL.

Solution 3:

For IntelliJ Idea: Call "Project Structure" (Ctrl+Shift+Alt+S), go to "Platform Setting - SDKs", choose "Documentation Path" tab on the right, then add url of JavaDoc (http://docs.oracle.com/javase/7/docs/api/) to your project

Solution 4:

You can add the external Javadocs API link as shown below:

• Go to File > Project Structure...
• Then select SDKs (under Platform Settings)
• Go to Documentation Paths tab
• Select Specify URL button and add the link for JDK 11 API docs (https://docs.oracle.com/en/java/javase/11/docs/api/)

Solution 5:

I understand the question as follows:

You would like to see javadocs of classes that are not within JDK. I am a bit uncertain because CrazyCoder's reply is talking about JDK specific javadocs.

I am using Macos 10.8.4 and Intellij 11.1.5

The project I am working on is a mvn based project with many modules which have complex dependencies.

Let me take a concrete example to explain what I did, I am sure it can be reproduced for others: apache sshd

I downloaded the javadoc from maven central stored it stored it somewhere. In intellij I went to the module settings (shortcut F4) and the to Libraries in the sidebar. Maven pulls all dependencies automagically and I can find sshd there. The right side then shows Classes, Sources and JavaDocs. The JavaDocs part in my case had a path linked in that pointed to my local m2 directory. However the directory did not contain the javadoc jar file. So I thought how do I get it:

mvn dependency:resolve -Dclassifier=javadoc

Taken from here

However this failed for because we do not have some javadocs in our nexus (I guess, not sure).

So I ended up linking the file that I downloaded manually in as a javadoc link and this then allown me to use Shift+F1 for the javadoc to open in my standard browser.

Maybe others can elaborate on how to get this done with mvn. I did not have the time to further investigate.