File -&gt; Invalidate caches...

(Force rebuild of all caches and indices on next startup)

Restart IntelliJ IDEA.

Caution: This might Remove local history.

**Restarting IntelliJ** fixed this in my case (Ultimate 2019.1) -- on restarting, it rebuild the indexes by itself.

An interesting side effect, apart from all imports and non-local references coming up as errors, was the error reported on all string literals: 

    Incompatible types. 
    Required: java.lang.String 
    Found: java.lang.String

A program that creates several processes that work on a join-able queue, `Q`, and may eventually manipulate a global dictionary `D` to store results. (so each child process may use `D` to store its result and also see what results the other child processes are producing)

If I print the dictionary D in a child process, I see the modifications that have been done on it (i.e. on D). But after the main process joins Q, if I print D, it&#39;s an empty dict!

I understand it is a synchronization/lock issue. Can someone tell me what is happening here, and how I can synchronize access to D?

multiprocessing: How do I share a dict among multiple processes?

I am using the javac compiler to compile java files in my project. The files are distributed over several packages like this: `com.vistas.util`, `com.vistas.converter`, `com.vistas.LineHelper`, `com.current.mdcontect`.

Each of these packages has several java files. I am using javac like this:

&lt;!-- language: none --&gt;

    javac com/vistas/util/*.java com/vistas/converter/*.java
          com.vistas.LineHelper/*.java com/current/mdcontect/*.java

(in one line)
 
Instead of giving so many paths, how can I ask the compiler to compile recursively all the java files from the parent com directory?

javac option to compile all java files under a given directory recursively

IntelliJ IDEA 10.5.1 is reporting zero usages for all method, classes etc. 

Can I force IntelliJ to rebuild the project indexes?



Rebuild IntelliJ project indexes

<p>IntelliJ IDEA 10.5.1 is reporting zero usages for all method, classes etc.</p>
<p>Can I force IntelliJ to rebuild the project indexes?</p>


For some reason, dragging the mouse cursor started doing block selects instead of the normal line select mode:

![enter image description here][1]

(Please ignore the fact that this image is from Visual Studio and not IntelliJ)

I tried pressing scroll-lock, pressing and releasing the alt/ctrl/shift keys, but still selecting doesn&#39;t revert to the normal &quot;select full lines&quot; mode. When I click and hold, then drag the mouse, I get a block (rectangle) selection.

Do you know how to undo this?

P.S. I&#39;m running IntelliJ 9 on Ubuntu.

P.S. Holding SHIFT and pressing the up arrow button also does block select instead of normal multiline select.

  [1]: http://i.stack.imgur.com/70bmw.png

How do I turn off mouse block selection in IntelliJ?

How to enable remote debugging from IntelliJ with Tomcat?

Remote Debugging in IntelliJ Tomcat

We use reflection extensively to set class field values in our code. The fields are accessed in code but they are never assigned except via reflection. So IDEA displays &quot;is never assigned&quot; warning. If I ask IDEA to suppress the inspection, it inserts

    @SuppressWarnings({&quot;UnusedDeclaration&quot;})

but this also disables the check of whether the field is used or not, which we do not want.

Is it anyhow possible to disable only &quot;not assigned&quot; check and leave &quot;not used&quot; check for specific fields only?

IDEA version is 10.5

Suppress &quot;variable is never assigned&quot; warning in IntelliJ IDEA

I really like the &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;1&lt;/kbd&gt; shortcut (hints for errors and mini refactorings) in Eclipse. Is there an equivalent for it in IntelliJ and Android Studio?

Eclipse&#39;s Ctrl+1 in IntelliJ and Android Studio

Everyone on our team uses IntelliJ IDEA, and we find it useful to put its project files (.ipr and .iml) into source control so that we can share build configurations, settings, and inspections. Plus, we can then use those inspection settings on our continuous integration server with TeamCity. (We have the per-user workspace .iws file in the .gitignore file and not in source control.)

However, those files change in little ways when you do just about anything in IDEA. There&#39;s an issue in IDEA&#39;s issue database for it ([IDEA-64312][1]), so perhaps one might consider this a bug in IDEA, but it&#39;s one we&#39;ll need to live with for the foreseeable future.

Up until recently, we were using Subversion, but we recently switched to Git. We had each just gotten used to having a change list of project files that we ignored and didn&#39;t check in unless there were project file changes that we wanted to share with others. But with Git, the real power seems to be (from what we&#39;re exploring) the continuous branching that it encourages, and switching between branches is a pain with the project files always having been modified. Often it can just merge in the changes somehow, and tries to deal with the project file changes now being applied to the new branch. However, if the new branch has changed project files (such as the branch is working on a new module that isn&#39;t in the other branches yet), git just throws an error that it doesn&#39;t make any sense to merge in the files when both the branch has changes and you have changes locally, and I can rather understand its point. From the command line, one can use &quot;-f&quot; on the &quot;git checkout&quot; command to force it to throw out the local changes and use the branch&#39;s instead, but (1) the Git Checkout GUI command in IDEA (10.5.1) doesn&#39;t seem to have that as an option that we can find, so we&#39;d need to switch to the command line on a regular basis, and (2) We&#39;re not sure we want to be in the habit of using that flag and telling Git to throw out our local changes.

So, here are some thoughts we have on options we have to deal with this:

 1. Take the project files out of source control entirely. Put them in the .gitignore, and distribute them to each person and TeamCity via some other means, maybe by putting them in source control somewhere else or under other names. Our team&#39;s small enough this option is feasible enough to consider, but it doesn&#39;t seem great.
 2. Continue living with it, trying to be sure to manage which files we have on which branches at a given time. As part of this, we might encourage each developer to have more than one copy of each project on their system, so they can have each checked out to a different branch with possibly different sets of project files.
 3. Try having just the project (.ipr) in source control, with the module (.iml) files not in source control and in the .gitignore file. The main thing that seems to switch around on its own in the .ipr on a regular basis is the order of the shared build configurations, but maybe we can just share the information separately on how to set those up. I&#39;m not quite sure how IDEA deals with this kind of thing of only having some of its files though, especially on a new checkout.

I guess I&#39;m hoping there&#39;s some obvious (or non-obvious) solution we&#39;ve missed, perhaps dealing with the huge customizability that Git and IDEA both seem to have. But it seems like we couldn&#39;t possibly be the only team having this problem. Questions that are kind of similar on Stack Overflow include [3495191][2], [1000512][3], and [3873872][4], but I don&#39;t know as they&#39;re exactly the same issue, and maybe someone can come up with the pros and cons for the various approaches I&#39;ve outlined, approaches listed in the answers to those questions, or approaches that they recommend.



  [1]: https://youtrack.jetbrains.com/issue/IDEA-64312
  [2]: https://stackoverflow.com/questions/3495181/need-a-strategy-to-put-intellij-idea-project-files-in-git
  [3]: https://stackoverflow.com/questions/1000512/merges-on-intellij-idea-ipr-and-iws-files
  [4]: https://stackoverflow.com/questions/3873872/best-practices-for-using-git-with-intellij-idea

How to deal with IntelliJ IDEA project files under Git source control constantly changing?

How to make phpstorm display line numbers by default?&lt;br&gt;
Couldn&#39;t find that option. It&#39;s kind of annoying to turn them on manually for each page.

How to make phpstorm display line numbers by default?

I cannot seem to be able to find the setting to enable line numbers for _all_ files, but I have to always right click and enable this on per file basis. 

There must be a global setting for this, right?

How to make PyCharm always show line numbers

How can I enable *word* wrapping in PhpStorm?

I need to enable it only for some of my files (with extension .txt). Is it possible?




Word wrapping in PhpStorm

Is it possible to remove empty/blank lines using code formatting in Intellij IDEA?

How to remove unnecessary blank line on code formatting in IntelliJ?

How can I set up that the code is reformatted automatically on saving?

So I don&#39;t always have to press &lt;kbd&gt;Ctrl&lt;/kbd&gt; + &lt;kbd&gt;Alt&lt;/kbd&gt; + &lt;kbd&gt;
L&lt;/kbd&gt;.


Content Type	Original Author	Original Content on Stackoverflow
Question	Paul McKenzie	View Question on Stackoverflow
Solution 1 - Intellij Idea	Boris Pavlović	View Answer on Stackoverflow
Solution 2 - Intellij Idea	drevicko	View Answer on Stackoverflow

Rebuild IntelliJ project indexes

Intellij Idea Problem Overview

Intellij Idea Solutions

Solution 1 - Intellij Idea

Solution 2 - Intellij Idea

javac option to compile all java files under a given directory recursively

multiprocessing: How do I share a dict among multiple processes?

Attributions