Why does IntelliJ give me "Package doesn't exist" error?

Just reimport didn't work. Following worked for me.

File -> Invalidate Caches /Restart

Then

Build -> Rebuild Project

That will reimport maven project.

Note : You need to invalidate the cache AND ALSO rebuild the project.

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I tried to "Maven > Reimport" but the only thing that actually fixed it was to close the project, delete the .idea directory, and reopen the project.

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Right click your project / Maven (at bottom) / Reimport

Edit, much later: I also saw this happen much more frequently when I had the Clover plugin installed. Drop that plugin like a bad habit!

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None of the 13 existing answers worked for me. However, I could resolve the issue by first removing all modules:

open File > Project Structure..., go to Modules tab, select all modules and press the remove button,

then removing all remaining Maven modules from Maven tool window:

select all modules, right click on them, press Remove projects,

and then adding them again in Project tool window:

right click on root pom.xml, press Add as Maven project,

now unignoring any ignored modules from Maven tool window:

select all ignored (grey) Maven modules, right click on them, press Unignore,

and finally rebuilding using Build > Rebuild project. This assumes that a mvn clean install already happened.

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In my case the only thing that worked is:

mvn idea:idea

The good thing is that you don't have to delete .idea folder or .iml files and loose all configuration. Everything will be preserved.

(Possibly something like gradle idea works for gradle too).

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menu -> build -> Rebuild Project

has worked for me

(Invalidating caches without this step doesn't help)

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https://i.stack.imgur.com/vqjjX.png

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If you added a library to the project structure (rather than via maven, that would be different), be sure it is included as a dependency for the relevant module.

Project Structure -> Modules -> Dependencies

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Tried all the above approaches, didn't work. Finally running maven clean install solved it!

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Quit IntelliJ, remove every .idea directory:

rm -Rf **/.idea/ 

and restart.

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It's a very annoying problem which happens quite often. Especially after switching to a different git branch. It wasted me way too much time to troubleshoot this kind problem. I have tried all the methods above. But I can't find a reliable way. Here I just summarize those steps which could help in my situation. Jetbrains, please fix this issue to save your customer's precious time.

Make sure do a success command line build (If UT failed, please ignore UT by using -Dmaven.test.skip=true. In the "Maven Projects" view, try to use "reimport" all the maven project. In the file menu, use "Invalidate Caches" Delete .idea folder, basically create the workspace from scratch. (That's the only reliable way can solve this issue)

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In my case the problem was that there was a different repository directory configuration in IntelliJ and in settings.xml file.

Check both repository directories are the same:

IntelliJ (File > Settings > Build,Execution,Deployment > Build Tools > Maven )

https://i.stack.imgur.com/x2eL4.png

settings.xml (usually in C:\Users\myuser\.m2 or /home/myuser/.m2)

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      http://maven.apache.org/xsd/settings-1.0.0.xsd">

  ...
  <localRepository>C:\Users\myuser\.m2\repository</localRepository>
  ...
</settings>

After fixing directories run:

Generate Folders and Update Sources for All Projects

https://i.stack.imgur.com/5wczO.png

Reimport all maven projects

https://i.stack.imgur.com/8TXhK.png

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Invalidate Caches/ Restart and then Build -> Rebuild Project helped for me

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I tried all appreciated answers and none of them solve my problem!

According to Intellij community, there is a bug with Maven builds in 2020.1 and 2020.1.1 versions: https://youtrack.jetbrains.com/issue/IDEA-237320?_ga=2.235486722.203129946.1591253608-322129264.1584010541

Please try to run on 2019.3.4 version (Its worked for me from the first time)

You can download from here

https://www.jetbrains.com/idea/download/previous.html?_ga=2.190043688.203129946.1591253608-322129264.1584010541

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Similar to cvdr. Too high a Java version can be the problem.

A collegaue just have this problem with multiple java sources in our test project. She had just updated to a later Intellij and when we investigated none of the rebuild options worked but Intellij seemed to have 'bumped' the project Java settings to Java 11 (I guess it takes highest installed version on upgrade install?) Setting it back to Java8 and the project compiles successfully.

Go File>Project Structure > Project Settings > Project and select the right ones in the drop downs.

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Here is a solution worked for me: Disable the "Use --release option for cross-compilation like the following in intellij idea: got Settings -> Build,Execution,Deployment -> Compiler -> Java Compiler and disable:

Use '--release' option for cross compilation(java 9 and later)

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I got this error after I changed pom, and I fixed it by execute:

mvn idea:module

it works for me

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As someone who only occasionally needs to do Java work, this was very annoying. Inevitably, packages would have been added since the last time I ran our server inside IntelliJ and it would fail to build. I found what seems to be an easier solution: just don't build within IntelliJ. Build from the command line via Maven, then make sure that the run configuration does not list Build as a "Before launch" task.

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I tried

"Maven > Reimport" Deleting the .idea directory, and reopening the project. File -> Invalidate Caches/Restart then Build -> Rebuild Project Deleting what is inside local .m2 folder, and downloading dependencies again. Running mvn idea:idea in Maven console (Though this command is obsolete, I had to try.)

in different combinations.

But going from Intellij 2020 version to 2019 solved my issue.

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I had this problem in IntelliJ 2020.3 and tried the invalidate cache option and rebuild, but the problem persisted. The only thing that fixed it was to rename the package and rename it back to what it was originally.

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I had the same problem and it was fixed for me by changing the "Maven home directory" in Settings from "Bundled" to my locally installed maven. Perhaps this triggered some kind of refresh somewhere since I had not changed this setting for months without any issue.

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What happens here is the particular package is not available in the cache. Resetting will help solve the problem.

File -> Invalidate Caches /Restart Goto terminal and build the project again ./gradlew build

This should download all the missing packages again

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I had the same issue with my unit tests. I created tests on my master branch and early everything worked well, no matter what branch I was using. But when I switched again to master branch, tests did not work anymore. What helped me was to:

close intellij -> delete .idea file from directory -> open project again by pom.xml (idk if it matters what way you open the project, but first time when I tried to open it normally by intellij, it still dit not work) -> reload all maven projects from right menu -> rebuild project and that's it, everything works now

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I had the same problem. I fixed it by applying the android-apt plugin https://bitbucket.org/hvisser/android-apt

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Maven reimport, rebuild and invalidate caches did not work. I solved it by opening a terminal and executing maven clean install in the root folder project. (IntelliJ was opened and I was able to see the IDE updating and triggering reindexation while maven was doing his job)

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If you are trying the suggested ways and still no chance, be sure about your order:

Delete your .idea/ Invalidate and Restart Cache afterwards Import maven projects from your maven tool

If you did not invalidate and restart cache just after deleting your .idea/, Intellij keeps generating it and that was keeping error in my case.

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If you do not want to destroy .idea, you can try :

open Project Structure > Modules

unmark the java folder as a source folder

apply / rebuild

then mark it again as a source folder

rebuild

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In case you're facing very weird "unable to resolve java, sun packages problem", try the following:

Open Project Structure and change Project SDK to another version, example: java 8 -> 9; 11->13, etc, and wait until it re-index all jdk's jars. Switch between jdks with same version may not work! (Ex: jetbrains jdk11 -> openjdk 11) Open a new project (or create a empty one); pause new project's indexing; close the old one; start indexing; open the old project and pause the new project's indexing and wait.

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I tried compile a java 8 project with JDK 12 and has the same issue. None of previous answer solved my problem.

I changed o Shortel Command Line to "JAR Manifest" and worked like a charm.

https://i.stack.imgur.com/4k6yW.png

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The above solutions didn't work for me. I had to add the dependency explicitly in the pom.xml.

Just add your jar under resources/library and then add it as a dependency in your pom.xml like:

        <dependency>
            <groupId>your-jar-group-id</groupId>
            <artifactId>artifact-id</artifactId>
            <version>1.0</version>
            <scope>system</scope>
            <systemPath>${basedir}/src/main/resources/library/name-of-jar.jar</systemPath>
        </dependency>

Try this out if none of the above work.

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