Intellij IDEA show javadoc automatically

Question

When I am coding at Netbeans it autocompletes the code and show Javadocs. However when I am using Intellij IDEA if I click Ctrl+Space I can see the auto-complete and if I click Ctrl+Q I can see the javadoc seperately.

Is it possible to see the Javadoc of element whenever I see auto-complete or click Ctrl+Space at Intellij IDEA as like Netbeans?

Solution 1

Settings | Editor | General |Code Completion | Autopopup documentation in (ms).

UPDATE: latest versions have an option to show JavaDoc on mouse move.

Solution 2

Show Javadoc in IntelliJ IDEA 14:

• When you write code:

  File -> Settings -> Editor -> General -> Code Completion -> Autopopup documentation in (ms)

It's only available when you press CTRL+SPACE It's more usable if you select the pin icon when it popups. The documentation window will be added to the tabs on the right. Later on I recommend to resize the window and to uncheck the Pinned property.

• On mouse hover:

  File -> Settings -> Editor -> General -> Show quick documentation on mouse move

Solution 3

File -> Settings -> Editor -> Code completion.

Check Autopopup documentation in (ms) and choose delay.

Comments

[kamaci]

It's OK. When I click ctrl + space it shows both code completion and javadoc. However when I don't click ctrl + space it autocomplets but doesn't show javadoc?

[CrazyCoder]

Yes, this behavior is by design, when automatic completion is invoked, JavaDoc is not shown.

[kamaci]

It would be nice if it was possible to see both javadoc and code completion, thanks.

[kamaci]

I added it as a request: youtrack.jetbrains.net/issue/IDEA-76223?projectKey=IDEA

[Guillaume Husta]

@kamaci : it works also without code completion, on mouse over : see stackoverflow.com/a/22759295/1677594 (show quick doc on mouse move)

[smac89]

The idea of pinning it to the side of the window is very useful

[mcont]

Still accurate ten years later, if someone's wondering.