Intellisense in IntelliJ no longer working

StackOverflow https://stackoverflow.com/questions/22518529

Question

I'm currently running IntelliJ IDEA 13.1. While running IntelliJ 13 intellisense/autocomplete stopped working. I tried upgrading and it still doesn't work.

I can explicitly invoke code completion using ctrl+space. I looked in Settings->Editor->Code Completion and nothing looks out of place. Is there somewhere else that turns this feature on/off?

Was it helpful?

Solution 2

Check to see if you accidentally turned on Power Save (File/Power Save Mode) I myself just discovered that File/Power Save Mode does turn it off. I was having the same problem and must have accidentally set Power Save Mode to on.

OTHER TIPS

For me it was because I did not have a folder marked as Source Root (it appears in blue).

To fix, right click your root source directory -> Mark As -> Source Root.

I'm using Mac and when I upgraded to Big Sur my intellisense stopped working.

This is due Big Sur has a shortcut for Input Source. By disabling Mac shortcut, will make Intellisense work again.

You can see the option to disable in mac: enter image description here

File -> Settings-> Editor-> General -> Code Completion-> Auto pop up code Completion

If other options mentioned is already true for you,try Setting up Sources/Test folder as Sources Root/Test Sources root as it did the trick for me. I had forgot it.

Right click on folder, choose "Mark Directory as" Test Sources or Sources Root, or whatever applicable. :)

I tried all the above option and it did not solve the issue. In my case:

THE ISSUE: node_modules was not loaded in the file structure of the project.

THE SOLUTION: go to explorer(finder/nautilus) find the .idea folder in the project and delete it. Then re-import the project. Once I re imported the project it loaded the node_modules folder as library root

Note: It will take a few seconds for IntelliJ to index all the libraries. You will see a loader on the bottom right next to line number info.

Try disabling all plugins you have. I installed Codota and it turns out to be garbage. I uninstalled it and disabled the plugin in IntelliJ and it worked

Had the same problem and none of these helped. What I realized was that on mac, control + space is used by the OS to change language inputs and it overrides intellij. So if you are on mac having multiple input languages on your keyboard, consider changing the shortcut for it :)

In my case, I restarted the Intellij and everything came back to normal.

Had the same problem until:

  1. Third party JDK installed
  2. Configured in module settings: right click on project name, then "Open module settings" -> SDKs -> "+". Pick the jdk root folder and Idea will take care of the rest.
  3. Re-indexed a bunch of things. It happens automatically, just be patient

For me, it was I hadn't yet set up the JDK.

Type something out, Ctrl+Space to try to autocomplete. If it fails, do Alt+Space and if the option comes up to setup JDK, do that.

In IntelliJ 2017-2 to configure Autocompletion:

Settings -> Editor -> General -> Code Completion

In case this helps anyone; for me it was a windowing glitch of some kind. The suggestions popup showed on the wrong monitor, which I didn't notice the first time it happened.. after a while I saw what was happening. Resizing the window seemed to fix it.

If you're too lazy to restart your machine to fix the issue, you can kill the process taskkill /F /PID pid_number_of_idea64.exe (task manager -- view>select columns>PID) and then open CMD, head over to C:\Program Files\JetBrains\IntelliJ IDEA xxxx.xx.xx\bin, start idea.bat. Let this CMD window open. Please note that even after executing taskkill, idea64.exe process doesn't disappear from task manager. Try executing the same command again and you'd know that process doesn't exist anymore.

For me the code completion suddenly stopped working because I had nudged the IDEA window slightly off-screen, maybe just a pixel or two, which caused the code completion pop-up to (presumably) appear off-screen. Making sure the application window was fully visible fixed the problem.

In case none of these work for you, if you are using IdeaVim, make sure your ~/.ideavimrc does not override Ctrl+Space, you can check this in vim:

:verbose map <c-space>

In my case, it was set by ~/.vim_runtime:

Last set from ~/.vim_runtime/vimrcs/basic.vim line 208

Thanks @s1n7ax for the tip!

IMPORTANT

If you had your email logged-in on IntelliJ Idea for a while and its token expire the Intellij will suddenly stop working or crash(My Version 2020.1.1).

Do two things.

1. file > sync settings with JetBrains account (log in here)
enter code here.
2. file > Invalidate cache / restart

I'm using Maven project, it works by:

File > Project Structure > Modules > Sources and then marked java files dir as Sources.

reference link.

Spent hours to fix this problem too. For me, the answer was to disable a plugin.

Which one to disable? Just find out using trial and error since all kinds of plugins can cause errors...

It depends which product, for Intellij I might have to right click and import the .iml file from the root, or in Rider right click the solution file and open that. I'm only making this mistake 4 or 10 more times, and then it is never happening again.

In my case plagin Lombok broke autocompletion.

Android Studio Flamingo 2022.2.1 Patch 2
Lombok 0.34.1-2019.1

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