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I am having issues with IntelliJ - it shows me a "decompiled" version of the class instead of its source code if I ctrl+click the class.
This is what I see:
I am trying to open regular JDK source files.
The most relevant issue I found is explained here: Java sources replaced by decompiled files in Intellij
The most detailed answer I've found so far is there as well.
Yet it doesn't work for me:
Bytecode Viewer plugin is off.
Java Bytecode Decompiler plugin is off.
Platform, Project and Module all have same JDK version setup.
I have two JDKs available in IntelliJ: jdk1.8.0_161 and jbsdk8u112b287.2_windows_x86 (bundled with IntelliJ, but comes without src.zip). Tried with both (had to specify src.zip of jdk1.8.0_161 for jbsdk8u112b287.2_windows_x86) - no luck
src.zip is not corrupt - I can open it via WinRAR
When added jdk1.8.0_161 to IntelliJ, it automatically found src.zip. When manually adding src.zip to jbsdk8u112b287.2_windows_x86 Sourcepath tab - it started "Scanning for roots", but warned me that it "cannot determine what kind of files the chosen items contain" and offered me to "attach them as 'Sources'" so I agreed.
Tried File > Invalidate Caches / Restart... - same result.
Same issue in 2017.3 and fresh 2018.1 versions of IntelliJ.
Providing path for Documentation makes IntelliJ look for the documentation in the path specified. So it works as it should for both of JDKs. But not for sources.
Everything else works/compiles properly.
My settings:
1. Get the source files
Make sure you have downloaded and installed the source files of the JDK.
I'm on Arch Linux and installed them with pacman -S openjdk8-src which put a src.zip into /usr/lib/jvm/java-8-openjdk/. We'll use that zip file in the next step.
To list source packages of different JDK versions, do pacman -Ss "openjdk.*-src".
See this question on how to get the source files for your specific platform.
2. Point IntelliJ to the source files
In your module settings (open them with F4) under "Platform Settings" → "SDKs" → "Sourcepath", add the zip file containing the JDK source to your project JDK (be sure to pick the right JDK if IntelliJ lists more than one JDK) using the button with the plus sign:
3. Jump into the source
Select a JDK class, like Comparator, using IntelliJ's Search Everywhere or Ctrl+b with the cursor on the name of the class.
I also have the same problem. The problem for my case is that Project SDK is set to 13 [Invalid]. After I can Project SDK to a valid SDK. My problem is solved.
I tried all the things mentioned at other places for this but at the end I was doing a silly mistake. Intellij was pointing to JDK 11 for which there was no source code (I had both the SDKs 8 & 11). I removed JDK 11 and pointed to JDK 8. JDK had the source code, thus now I can see the source code on ctrl click. Also, I had disabled the bytecode viewer and decompiler plugins. Hope this helps some one.
This also happens for large files - IDEA decides to decompile them instead if indexing sources, which can take ages.
If you're willing to accept the drawdown, adding the following in Help | Edit Custom Properties might fix the problem:
idea.max.intellisense.filesize=4096
On ubuntu there was java version “OpenJDK” when I changed to “Oracle Java”, the error went away and javadoc returned
I meet same problem and finally it gone after I copy JDK to another folder and change config in IntelliJ. I think maybe cause there is a space in path before, because it is installed under "Program Files" folder.
For downloading the source code of class files belong to jar you can use download source option present on top right corner in the de-compiled class file.
On my Windows 10, expand maven:
For me going to File -> Project Structure -> Project -> SDK -> Add SDK -> Download JDK and selecting Oracle OpenJDK solved the problem. Prior to that I had a different JDK selected and apparently it didn't include source code
If you are in a maven project make sure in the project structure all the complied folders are in the excluded section.
I suggest to use Linux Instead of windows. It's easy to find and download Java.
If you are using Linux, you can download SDKMAN
Install Java by SDKMAN
# find version
$ sdk list java
# download
$ sdk install java x.y.z-amzn
ctrl+alt+shift+s add JDK
Switch project JDK
If you are using maven , Right click on Project explorer -> choose Maven -> chick on "reload projects"
This did the trick for me:
Make sure you select the option "Project Files" (instead e.g. "Project").
I have installed IntelliJ and I need to import a Gradle project.
I have build the gradle project using command prompt with the gradlew build command.
At the IntelliJ welcome page, I have proceeded with proper instructions, and when I choose "Finish". I get the following error:
Invalid Gradle JDK configuration found. Open Gradle Settings JAVA_HOME ennvironment variable not set.
When I click on "Open Gradle Settings" it pop up with error of Not found with a path under IntelliJ directory in Program files and searching in jre/jre/bin/....etc.
Deleting .gradle and .idea will likely solve the problem.
So:
Close the project
Go to the project dir and delete .gradle and .idea
Get back and re-open the project using the IDE
These two must be generated locally on your PC (Some content of .idea might be version controlled though) and not pulled from a remote or somewhere else (Also they should be in .gitignore).
In my case the reason was that these two folders were generated on another computer and I had opened a project with these two folders existing before.
Just found the solution :
Create an empty Gradle project, then go to "Project Structure" and check the path to JDK (it should be valid, if it isn't you can add your own path).
Then build this empty project, wait and once done, close IntelliJ.
Relaunch it and try to import/open your Gradle project, now it should work.
You don't need to create a new project to fix this. You can do it from the main window (Configure -> Project Defaults -> Project Structure):
Then, on SDKs, set the appropriate JDK home path:
If you are on a Mac, click on the button with 3 dots and select the folder /Library/Java/JavaVirtualMachines/jdk1.8.0_141.jdk/Contents/Home.
I've found this here:
https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000266650-invalid-gradle-jdk-configuration-found
Mac OS X Solution:
I had the same issue and fixed it by setting the JAVA_HOME environment variable using the command:
launchctl setenv JAVA_HOME /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home/
Refer to this answer on how to set environment variables in Mac OS X:
Setting environment variables in OS X?
Close the project
Go to the project dir and delete
.gradle
.idea
Get back and re-open the project using the IDE
I recently had the same problem while importing a Gradle project. The trick was the remove the quotes from the JAVA_HOME variable. So instead of "C:\Program Files\Java\jdk1.8.0_66" my path now contains only the plain path C:\Program Files\Java\jdk1.8.0_66.
To add to the previous responses, if you want to prevent this problem when cloning a repository in Git, you can simply remove .idea/misc.xml from your .gitignore file. This contains information about the project jar. For example:
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectRootManager" version="2" languageLevel="JDK_10" default="false" project-jdk-name="1.8" project-jdk-type="JavaSDK" />
</project>
For my case, I just restart the IDE and it works. It automatically download Gradle to suit the project version.
I had the same problem on the fresh installed Windows OS.
I did not have a JDK at all and forgot to check it invalid JDK configuration .
By default, you can check the Project configuration. If it is empty NO_SDK_ProjectStructure try to download JDK from Oracle web site and configure your project structure
I have faced same problem for tomcat 9 with my project based on Gradle.
You can easily rectify the problem by configuring the application.properties file with the following code.
location - src/main/resources/application.properties
server.port = 9090
spring.security.user.name= admin
spring.security.user.password= password
My issue was not addressed by the above solution, instead root cause was that I've imported settings from my old system and internal Intellij configuration was invalid because first jdk that it had in the list in jdk.table.xml pointed to a wrong path.
To fix this you should find this file in the intellij config folder and then simply open it with an editor and remove whole block related to the bad jdk version.
Close the project you are working on and then create another new project and build it and then close it and go back to your old project and it will work.
Comment this code on gradle.properties, the Issue was gone.
#org.gradle.java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_141.jdk/Contents/Home
I was getting:
Invalid JDK: /home/sz97/idea-IC-223.7571.182/jbr/bin/jlink is not a file!
Ensure JAVA_HOME or buildSettings.javaHome is set to JDK 15 or newer
As mentioned by Mahdi-Malv, delete .gradle & .idea folders from the project directory.
Then delete other SDKs from File > Project Structure > Platform Settings > SDKs keeping the only required one.
Finally change the SDK version from Project Structure > Project Settings > Project.
This may solve the problem.
I have a Scala Play project. I'm using Play 2.2.1. I downloaded Scala, Play 2 supported and SBT plugins. Everything is OK, but When I call route on Action in the Controller appear following error(Look screenshots):
I'm using IntelliJ IDEA 12.1.6 Ultimate version. Scala version 2.10.2
Anybody know how to fix this problem?
Thanks in advance!
Edit
When I generate my project to Intellij IDEA via "play idea" command in play console, and I opened project in IDEA project structure was such:
Then I saw answer #millhouse and discussing on this githup([Play 2.2] "play idea" creates not working source mapping in target) and I removed following folders from Sources Folders:
target\scala-2.10\src_managed\main\controllers
target\scala-2.10\src_managed\main\views
and "Report highlighting error" disappeared, but now there is another error:
and
my route:
And I've changed "Sources Folders" as shown below:
But it doesn't help me. And remains "Unspecified value parametrs" error.
millhouse's answer helped me find the right answer. Play 2.2 (and perhaps earlier versions, haven't checked) output a scala version of the routes file to project_dir/target/scala-2.10/src_managed/main So for IntelliJ to get the highlighting right you need to make sure that src_managed/main is added as a source folder. The reverse routes for javascript are for some reason included in project_dir/target/scala-2.10/classes_managed so you'll have to add that as well. (In your screenshot it looks like classes_managed is set to excluded so you'll want to un-exclude it by pressing the x button on the right hand side.)
Here's a screen shot of my project structure:
Update:
In Play 2.3 (or perhaps recent versions of IntelliJ) adding the classes_managed no longer fixes the problem. Instead of adding classes_managed to the project's sources add it to it's dependencies. By doing that IntelliJ should be able to pick up the compiled routes.class.
This is a common problem, it's because IntelliJ needs to be shown where to look for the compiled Scala templates and routes file. Here's how I fixed it on my IntelliJ 12.1 installation:
Go to the Module Settings for your project in IntelliJ (select the top-level, hit F4)
Choose the Modules item in the Project Structure window that appears
Select the projectname item (as opposed to the projectname-build item)
Add the compiler's output directory to the Source Folders items;
For Scala 2.10 it's target/scala-2.10/classes
I personally find the IntelliJ UI for this to be very non-intuitive; you might need to take the target directory and/or one of its subdirectories out of the Excluded Folders first
After applying that change, IntelliJ should see the results of compiling each routes and .scala.html file as just-another source file, so they won't show as "broken" and auto-complete should work for them.
The shortcut for this action is Shift+F1 but it is always grayed out even though I have pointed JDK documentation path to the docs folder (the docs folder is unzipped from jdk-7u2-apidocs.zip ).
Thanks
You need to specify the docs/api subdirectory of the unpacked documentation or use https://docs.oracle.com/javase/8/docs/api/ URL for the external documentation feature to work.
File -> Project Structure... then here :
I'm using 10.5.4. It was unclear to me from the docs or from resources online that you need to add this at Project Structure > SDK's > (Choose your SDK) > Documentation Paths > Specify URL.
For IntelliJ Idea:
Call "Project Structure" (Ctrl+Shift+Alt+S), go to "Platform Setting - SDKs", choose "Documentation Path" tab on the right, then add url of JavaDoc (http://docs.oracle.com/javase/7/docs/api/) to your project
You can add the external Javadocs API link as shown below:
Go to File > Project Structure...
Then select SDKs (under Platform Settings)
Go to Documentation Paths tab
Select Specify URL button and add the link for JDK 11 API docs (https://docs.oracle.com/en/java/javase/11/docs/api/)
I understand the question as follows:
You would like to see javadocs of classes that are not within JDK. I am a bit uncertain because CrazyCoder's reply is talking about JDK specific javadocs.
I am using Macos 10.8.4 and Intellij 11.1.5
The project I am working on is a mvn based project with many modules which have complex dependencies.
Let me take a concrete example to explain what I did, I am sure it can be reproduced for others: apache sshd
I downloaded the javadoc from maven central stored it stored it somewhere. In intellij I went to the module settings (shortcut F4) and the to Libraries in the sidebar. Maven pulls all dependencies automagically and I can find sshd there. The right side then shows Classes, Sources and JavaDocs. The JavaDocs part in my case had a path linked in that pointed to my local m2 directory. However the directory did not contain the javadoc jar file. So I thought how do I get it:
mvn dependency:resolve -Dclassifier=javadoc
Taken from here
However this failed for because we do not have some javadocs in our nexus (I guess, not sure).
So I ended up linking the file that I downloaded manually in as a javadoc link and this then allown me to use Shift+F1 for the javadoc to open in my standard browser.
Maybe others can elaborate on how to get this done with mvn. I did not have the time to further investigate.
Posting this here in case you're like me and don't necessarily want javadocs, but rather the documentation inside your IDE.
In my situation, I had downloaded OpenJDK 11 and wasn't able to get documentation inside IntelliJ. Instead I was getting decompiled code.
What helped me was the answer at https://stackoverflow.com/a/38413439
i.e.
Go to File > Project Structure > SDKs > Sourcepath > '+' on the right side.
Navigate to your JDK (I'm on Ubuntu so it was located under /usr/lib/jvm/openjdk-11/).
Select the src.zip (for me, /usr/lib/jvm/openjdk-11/lib/src.zip).
Click OK > OK (to "Choose Roots" pop-up) > OK (to Project Structure)
Let Intellij index and it should be available in your IDE.
Java 10 Documentation path
Got to File -> Project Structure Choose External URL
Below Link works Fine... THe default one does'nt work
https://docs.oracle.com/javase/10/docs/api/
Other answers are satisfying but in case you still can't see the documentation, make sure that your java file is located under the src path.
What are common causes for IntelliJ IDEA not being able to resolve built-in JVM types and methods? For example, when I mouse over String the tooltip says "Cannot resolve symbol 'String'". It's as if IntelliJ has doesn't know where the JVM is.
By the way, I am running OS X 10.6.6. Everything was working fine until I ran the system update this morning.
Most likely JDK configuration is not valid, try to remove and add the JDK again as I've described in the related question here.
First check if you have configured JDK correctly:
Go to File->Project Structure -> SDKs
your JDK home path should be something like this:
/Library/Java/JavaVirtualMachine/jdk.1.7.0_79.jdk/Contents/Home
Hit Apply and then OK
Secondly check if you have provided in path in Library's section
Go to File->Project Structure -> Libraries
Hit the + button
Add the path to your src folder
Hit Apply and then OK
This should fix the problem
I was facing the same problem when import projects into IntelliJ.
for in my case first, check SDK details and check you have configured JDK correctly or not.
Go to File-> Project Structure-> platform Settings-> SDKs
Check your JDK is correct or not.
Next, I Removed project from IntelliJ and delete all IntelliJ and IDE related files and folder from the project folder (.idea, .settings, .classpath, dependency-reduced-pom). Also, delete the target folder and re-import the project.
The above solution worked in my case.
For me, I had to remove the intellij internal sdk and started to use my local sdk. When I started to use the internal, the error was gone.
I tried almost everything but nothing was helping with the ibm jdk 1.8. to fix this issue. then I found an article from https://youtrack.jetbrains.com/issue/IDEA-279214/Cannot-resolve-symbol-String-when-using-IBM-JDK-180 and it worked like charm!!!
so sharing original help credit goes to #Serge Barano. incase anybody needs and not able to able to resolve the issue using previous solutions like me.
according to the article answer is:
IBM JDK has a weird layout and the jar with the String class is in bin directory for some reason:
d:\dev\ibm_sdk80\jre\bin\default\jclSC180\vm.jar
If you add it to the JDK classpath in IntelliJ IDEA, the issue should resolve:
For me, IntelliJ could autocomplete packages, but never seemed to admit there were actual classes at any level of the hierarchy. Neither re-choosing the SDK nor re-creating the project seemed to fix it.
What did fix it was to delete the per-user IDEA directory ( in my case ~/.IntelliJIdea2017.1/) which meant losing all my other customizations... But at least it made the issue go away.
First of all you should try File | Invalidate Caches and if it doesn't help, delete IDEA system directory. Then re-import the Maven project and see if it helps.
For me ,
File -> project structure -> Project Language Level (11) selection worked. Local variable syntax for lambda paramters.
In my case, cloning repo from the remote was the easiest way to solve this issue.