IntelliJ Code Completion not working for new Java classes

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IntelliJ IDEA 13 has started exhibiting a very weird behavior in my local setup.

Namely, in any new Java class added to an existing project, Code Completion does not work. So, after declaring an object variable of any type in the new class and then typing the name of that variable, followed by the dot (.), no suggestions come up for any of the methods of the corresponding object.

For example, after declaring

File f = new File("/home");

typing f. does not bring up a list of all the methods in the File class, to select one from. As a matter of fact, when typing the dot (.), no suggestions appear and at the bottom left (in the status bar) of the IDE window, the message "Identifier expected. Identifier expected." is displayed. Sometimes, a long list of totally irrelevant methods from irrelevant components or libraries are proposed.

Strangely, Code Completion works as expected if the above declaration happens in any of the existing classes.

This behavior persists after many combinations of machine restart, IDE restart, project re-importing, closing/reopening, or rebuilding.

Any ideas?

For followers, one thing that helped me (auto complete only showed cast field instanceof etc.) was that I had opened a maven module that didn't link correctly to its children (it had a commented out submodules section), so IntelliJ just showed the maven java files as basically "text" files with a tiny "j" in their icon in the project pane. Fixing up the root maven pom.xml file to include the children dirs as modules and voila, they are treated as real java files again, woot!

Intellij IDEA code completion does not suggest classes coming from , I'm working on a JAVA Maven module with IntelliJ IDEA and the code completion feature works fine suggesting classes from both my module  Intellij Idea Code Completion not working. I just started Intellij Idea ( version 13.1.4 )today and noticed code completion with ctrl + space doesnt work anymore. If i'm typing like a class the automatic popup still appears and i can autocomplete this way, but if i close the popup with esc i cannot open it with ctrl + space anymore.

Make sure you mark all your Source directories as such in File -> Project Structure -> Modules.

Code completion - Help, Basic code completion helps you complete the names of classes, methods, fields, and After the new keyword in an object declaration for Java and requires the project to be built with the IntelliJ IDEA compiler (not the Gradle compiler). If code completion doesn't work, this may be due to one of the following reasons:. Namely, in any new Java class added to an existing project, Code Completion does not work. So, after declaring an object variable of any type in the new class and then typing the name of that variable, followed by the dot (.), no suggestions come up for any of the methods of the corresponding object. For example, after declaring

Ensure that you are not in Power Save Mode while running IntelliJ (File [menu] -> Power Save Mode checked or not). If Power Save Mode is enabled, IntelliJ will not run background tasks, including code completion.

Auto completion is not working on the , Hello, I've installed the community edition of the JAVA editor IntelJ IDEA, which version is given below: IntelliJ IDEA 2016.3.5Build I'm a beginner in Java and am trying to run my code using IntelliJ that I just installed as my IDE with JDK 1.7. The following piece of code keeps does not even compile and keeps giving me the err

I am using IntelliJ Ultimate 2017.1, and I encountered similar issue. Maven project, was trying to using selenium APIs, but the intellisense didn't pop up relative methods for me.

Here is the way I solved my issue:

Right click on your project src folder Choose Mark Directory As Then select Sources Root

IntelliJ: Code completion not working, I have Ultimate Edition and I have the same problem and completed the same steps. I even uninstalled and reinstalled. I'm working with Java. I  Completion for chained expressions is only available for Java and requires the project to be built with the IntelliJ IDEA compiler (not the Gradle compiler). Statement completion You can create syntactically correct code constructs by using statement completion.

I had this same problem and it was caused by me not having a folder marked as sources root.

Right click on your src directory and Mark Directory As > Sources Root.

Autocompletion stopped working – IDEs Support (IntelliJ Platform , Initially code analysis got slower, now even code completion stopped working. ExecutorsQuery - While loading class com.intellij.psi.jsp. Basic code completion analyses the context around the current caret position and and provides suggestions as you type. You can open the completion list manually by pressing Ctrl+Space. For information on different completion modes, refer to Code completion. Build and run the application. Valid Java classes can be compiled into bytecode.

Java Spring application.properties Code Completion not working , Java Spring application.properties Code Completion not working any of the Spring Boot application.properties IntelliJ code completion Code completion is working fine in my Java classes, its just the Happy New Year! 0. Basic code completion helps you complete the names of classes, methods, fields, and keywords within the visibility scope. What's New for Java Developers in IntelliJ IDEA 2020.1 - Duration:

Code Completion not working at all – IDEs Support (IntelliJ Platform , 4 on Ubuntu 12.04 and the code completion is not working neither for the PHP STATEMENTS nor for defined vars or classes or whatever. Mine  Auto completion is not working on the community edition. > Editor > General > Code Completion make one class " hellow word " but i got the same trouble when i

IntelliJ Code Completion not working for new Java classes, IntelliJ IDEA 13 has started exhibiting a very weird behavior in my local setup. Namely, in any new Java class added to an existing project, Code Completion  Everything was red so I created a new plugin jdk and assigned it as the jdk used by my project. Idea still does not recognize standard Java classes such as swing

Comments
  • did you try to restart your pc? or re-install your IDE? or Cleaning up your project?
  • I have tried many such workarounds, sort of uninstalling and reinstalling IntelliJ.
  • Is there any reason you use such an IDE? Why do not you use NetBeans or other famous IDE that have better supports?
  • There are many reasons, but this is beside the point. After all, IntelliJ is a well-known IDE. :-)
  • Possible duplicate of Intellisense in IntelliJ no longer working
  • That may have been the case with my question, too, since the issue was fixed at some point, probably after linking a POM file to its parent. Thanks and +1. :-)
  • I had the same problem, and your suggestion inspired me to fix it. thanks! and +1. What I did was deleting the maven project from the Project section, and then added it again, and it worked afterwards. I think I accepted a menu suggesting a Maven configuration at some point.
  • Thanks for helping me out, see tiny "j"s in the project pane too, and realise the problem
  • After Modules I goes into src folder and mark it as Source, It enable auto Code Completion for me.
  • Then it will not provide auto-completion at all, not only for new classes, isn't it?