Sometimes the IDE makes some error because of the cache. In Eclipse, we can use clean to solve the problem. But how can I do this in IntelliJ?
Depending on the version you are running. It is basically the same just go to
File -> Invalidate caches, then restart Intellij
File -> Invalidate caches / Restart
The main difference is that in older versions you had to manually restart as cache files are not removed until you restart. The newer versions will ask if you also want to restart.
As seen here on this official Jetbrains help page
You can also try delete caches manually in the
system folder for your installed version. The location of this folder depends on your OS and version installed.
Windows Vista, 7, 8, 10
<SYSTEM DRIVE>\Users\<USER ACCOUNT NAME>\.<PRODUCT><VERSION>
Read this for more details on cache locations.
Maybe not THE answer, but it’s definitely AN answer.
If nothing else is working for you, go the nuclear option: Close IDEA and delete the “…/.IntelliJIdea/system” directory using your local file system tools.
The .IntelliJIdea directory is usually found in your home directory. Your IDE configuration is in the “…/.IntelliJIdea/config” directory, so it should be fine.
Obviously, this is not the “IDEA” way to do it and would be completely unsupported by JetBrains. Also – I don’t use Android Studio so I dunno if this will cause problems, but there you go.
It’s worked for me before when I’ve had problems getting IDEA to start and nothing else works to get me going.
Maybe back up your entire .IntelliJIdea directory if you have a morbid fear of losing all your work >.<
If you are using Maven, run this command in your project directory
mvn clean package
Go into Settings (File > Settings or ctrl+alt+S). Under Project Settings, select the “Compiler” node. On the left, uncheck “Clear output directory on rebuild”.
Note that this is a per project setting. If desired, change it in the project template settigs (Settings > Other Settings > Template Settings).
In addition to the
.Intellij* files, and invalidating the cache, if you really want to clear everything out, then also delete the
.idea folder and
*.iml per-project files that IntelliJ also generates…
Delete the “target” folder under the offending module. Then Build | Rebuild Project. Also make sure your clear the web browsers cache.
Another solution was VCS -> Cleanup Project
1) File -> Invalide Caches (in IDE IDEA)
2) Manually, got to C:\Users\\AppData\Local\JetBrains\IntelliJ IDEA \system\caches and delete