How can indentation be automatically (not manually) corrected in IntelliJ?
In Eclipse, it's possible to just highlight the code that needs indenting, right-click, and select Source > Correct indentation.
Is there any method for doing the same thing in IntelliJ?
Code → Reformat Code... (default Ctrl + Alt + L) for the whole file or Code → Auto-Indent Lines (default Ctrl + Alt + I) for the current line or selection.
You can customise the settings for how code is auto-formatted under File → Settings → Editor → Code Style.
To ensure comments are also indented to the same level as the code, you can simply do as follows:
(example for JavaScript)
Just select the code and
on Windows do Ctrl + Alt + L
on Linux do Ctrl + Windows Key + Alt + L
on Mac do CMD + Alt + L
Ctrl + Alt + L works with Android Studio under xfce4 on Linux. I see that Gnome used to use this shortcut for lock screen, but in Gnome 3 it was changed to Super+L (AKA Windows+L): https://wiki.gnome.org/Design/OS/KeyboardShortcuts
Select Java editor settings for Intellij
Select values for Tabsize, Indent & Continuation Intent
(I choose 4,4 & 4)
Then Ctrl + Alt + L to format your file (or your selection).
In Android Studio this works: Go to File->Settings->Editor->CodeStyle->Java. Under Wrapping and Braces uncheck "Comment at first Column" Then formatting shortcut will indent the comment lines as well.
You can also try out ctrl + alt + I even though you can also use l as well.
来源：https://stackoverflow.com/questions/9044472/how-to-correct-indentation-in-intellij