blocks|key|46402|text|选择“生成”->“重建项目”可以解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46403|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Select Build->Rebuild Project will solve it

blocks|key|46723|text|我遇到了同样的问题，并通过单击File>Invalidate缓存/重新启动修复了它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46724|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same problem and fixed it by clicking File>Invalidate caches/ restart

blocks|key|46594|text|我也遇到了同样的问题，结果发现我从来没有完全编译过fresh项目。因此，右键单击并选择编译‘’(在mac上按shift-cmd-F9组合键)可以修复它。似乎在保存时编译没有‘看到’未编译的文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46595|在我的例子中，将src文件夹标记为source没有任何帮助。|46596|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had the same problem, and turns out I had never completely compiled the fresh project. So right-clicking and selecting Compile'' (shift-cmd-F9 on mac) fixed it. It seems the compile on save does not 'see' non-compiled files.

Marking the src folder as source did not help in my case.

blocks|key|47330|text|这很可能是您的../src文件夹，在Intellij+IDEA中没有标记为"source“文件夹，因此它不知道在那里查找您的类。您可以在项目资源管理器中右键单击该文件夹，然后选择“标记为源文件夹”来修复此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47331|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

This is likely to be your ../src folder is not marked as a "source" folder in Intellij IDEA, so it doesn't know to look there to find your class. You can right click the folder in the project explorer and choose "mark as source folder" to fix this.

blocks|key|46358|text|当我做Build+->+Make+Project的时候，我得到了同样的“找不到符号”的错误。我通过删除Maven+/target文件夹，右键单击我的项目模块并执行Maven+->+Reimport，然后执行Build+->+Rebuild+Project来修复此问题。这是在IntelliJ+Idea+13.1.5上的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|46359|事实证明，Maven+->+Reimport是关键，因为在我最终做到这一点之前，这个问题又出现了几次。|46360|entityMap^0|3|L|1L|7|29|H|2V|O|0|5|H|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|I|$]]

I was getting the same "cannot find symbol" error when I did <code>Build -&gt; Make Project</code>. I fixed this by deleting my Maven <code>/target</code> folder, right clicking my project module and doing <code>Maven -&gt; Reimport</code>, and doing <code>Build -&gt; Rebuild Project</code>. This was on IntelliJ Idea 13.1.5.

It turns out the <code>Maven -&gt; Reimport</code> was key, since the problem resurfaced a few times before I finally did that.

blocks|key|46923|text|对于我来说-我尝试了这些步骤(无效缓存和重新启动，Maven重新导入)，但它们不起作用。因此，我删除了.idea、.settings和.project文件夹，并尝试使用它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|46924|entityMap^0|1F|5|1L|9|1V|8|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

For me - I tried these steps(Invalidate Cache &amp; Restart, Maven Reimport)) but they didn't work. So I deleted the <code>.idea</code>, <code>.settings</code>, and <code>.project</code> folder and tried - it worked.

blocks|key|2524401|text|感谢你到目前为止的帮助，事实证明修复方法是首先编译HUD.java+(右键单击文件->编译HUD.java)。编译完java文件后，项目的其余部分就可以顺利编译了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2524402|我真的不知道为什么这样做可以修复它，或者为什么IntelliJ不能自动修复它，但根错误似乎与IntelliJ没有正确处理单个.java文件中的多个类有关。|2524403|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Thanks for the help so far, turns out the fix was to compile HUD.java first (right click on the file-> Compile HUD.java). After compiling the java file the rest of the project could be compiled without any problems.

I don't really know why this fixed it, or why IntelliJ wouldn't do this automatically, but root error seems it has to do with IntelliJ not correctly handling having multiple classes in a single .java file.

blocks|key|2734582|text|我遇到了同样的问题，答案中给出了很多解决方案，尝试所有这些解决方案花了我相当长的时间，所以如果你遇到这个错误，我想在这里提出一个有条不紊的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2734583|检查以下内容，如果缺少，则创建/更新|offset|length|style|BOLD|2734584|Bug+Link将|2734585|src文件夹标记为源文件夹|ordered-list-item|2734586|.imls文件已启用实用程序处理如果您最近使用过@|2734587|，也可能是原因|2734588|2734589|如果一切正常，您可以按给定的顺序尝试以下解决方案|2734590|2734591|重新编译文件/模块|2734592|2734593|如果这不能解决问题，请尝试刷新maven依赖项并使用Maven+->+Reimport和Build+->+Rebuild+Project构建项目|CODE|2734594|2734595|2734596|试用mvn+clean+install+-DskipTests的|2734597|2734598|2734599|使用File+>+Invalidate+caches/+restart，尝试使|2734600|缓存无效并重新启动IntelliJ|2734601|2734602|2734603|删除.idea文件夹，然后重新导入项目|2734604|2734605|感谢回答了这个问题的每个人，你可以参考他们的回答来了解关于每一点的更多描述。|2734606|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/rzwitserloot/lombok/issues/2044^0|0|0|B|0|0|8|0|0|0|0|0|0|0|O|0|0|0|0|Q|H|18|O|0|0|0|2|T|0|0|0|2|X|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1Q|8|@$D|1R|E|1S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1T|8|@]|9|@$D|1U|E|1V|1|1W]]|A|$]]|$1|J|3|K|5|L|7|1X|8|@]|9|@]|A|$]]|$1|M|3|N|5|L|7|1Y|8|@]|9|@]|A|$]]|$1|O|3|P|5|L|7|1Z|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|20|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|21|8|@$D|22|E|23|F|G]]|9|@]|A|$]]|$1|T|3|-4|5|6|7|24|8|@]|9|@]|A|$]]|$1|U|3|V|5|L|7|25|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|27|8|@$D|28|E|29|F|Z]|$D|2A|E|2B|F|Z]]|9|@]|A|$]]|$1|10|3|-4|5|L|7|2C|8|@]|9|@]|A|$]]|$1|11|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|2E|8|@$D|2F|E|2G|F|Z]]|9|@]|A|$]]|$1|14|3|-4|5|L|7|2H|8|@]|9|@]|A|$]]|$1|15|3|-4|5|6|7|2I|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2J|8|@$D|2K|E|2L|F|Z]]|9|@]|A|$]]|$1|18|3|19|5|L|7|2M|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|2N|8|@]|9|@]|A|$]]|$1|1B|3|-4|5|6|7|2O|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|L|7|2P|8|@]|9|@]|A|$]]|$1|1E|3|-4|5|6|7|2Q|8|@]|9|@]|A|$]]|$1|1F|3|1G|5|6|7|2R|8|@]|9|@]|A|$]]|$1|1H|3|-4|5|6|7|2S|8|@]|9|@]|A|$]]]|1I|$1J|$5|1K|1L|1M|A|$1N|1O]]]]

I faced the same problem, and there are a lot of solutions given in the answer, trying all these solutions took me quite some time, so here I would like to propose a methodical approach if you get this error.
Check for the following things, create/update if something is missing
<ol>
<li>src folder is marked as the source folder</li>
<li>.imls files are present</li>
<li>Annotation processing is enabled</li>
<li>If you recently used @UtilityClass then it can also be the reason, <a href="https://github.com/rzwitserloot/lombok/issues/2044" rel="noreferrer">Bug Link</a></li>
</ol>
If everything is fine, you can try following solutions in given order
<ol>
<li>Recompile the file/module
</li>
<li>If that didn't fix the issue, try refreshing maven dependency and building the project using <code>Maven -&gt; Reimport</code> and <code>Build -&gt; Rebuild Project</code>
</li>
<li>Try <code>mvn clean install -DskipTests</code>
</li>
<li>Try invalidating the IntelliJ cache and restarting the IDE, using <code>File &gt; Invalidate caches/ restart</code>
</li>
<li>Delete the .idea folder and reimport the project
</li>
</ol>
Credit and Thanks to everyone who answered this question, you can refer to their answers for more description regarding each point.

blocks|key|46916|text|当我删除一个文件夹，然后将其复制粘贴到项目中时，就会发生这种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46917|Right-click+project+folder+->+Rebuild为我工作。|offset|length|style|CODE|46918|entityMap^0|0|0|11|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

This happened to me when I deleted a folder and then copy-pasted it back to the project.

<code>Right-click project folder -&gt; Rebuild</code> worked for me.

blocks|key|46796|text|我必须右键单击该项目，然后在"Run+Maven“子菜单下选择"Reimport”。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46797|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had to right-click the project, and select "Reimport" under the "Run Maven" submenu.

blocks|key|2733975|text|我在我的项目中使用maven。出于某种原因，IntelliJ给了我这些奇怪的错误。我干净利落地运行mvn，并尝试重新同步，但这些错误消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2733976|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I use maven in my project. For some reason IntelliJ was giving me these kind of wierd errors. I ran mvn clean and tried a resync and these errors disappeared.

blocks|key|2524918|text|重新编译主Application.java类为我做到了，右键单击class+>+Recompile|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2524919|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

recompiling the main Application.java class did it for me, right click on class > Recompile

blocks|key|2734534|text|对我来说，Lombok是一个问题，因为它需要启用注释处理。您可以在Settings+>+Build+>+Compiler+>+Annotation+Processors上找到此复选框|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2734535|entityMap^0|X|1F|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

For me was a problem with Lombok, because it requires Annotation Processing to be enabled. You can find this checkbox on <code>Settings &gt; Build &gt; Compiler &gt; Annotation Processors</code>

blocks|key|47358|text|我知道这是一个老问题，但根据我最近的经验，发生这种情况是因为构建资源要么被删除了，要么Idea无法将它们识别为源。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47359|无论出现错误的位置，请提供文件夹/目录的源，必须解决此错误。|47360|有时，即使我们为整个文件夹分配源代码，单个类可能仍然不可用。对于新手用户来说，简单的解决方案就是导入一个新的副本，然后重新构建应用程序。|47361|建议在此之后执行全新安装。|47362|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I know this is an old question, but as per my recent experience, this happens because the build resources are either deleted or Idea cannot recognize them as the source.

Wherever the error appears, provide sources for the folder/directory and this error must be resolved.

Sometimes even when we assign sources for the whole folder, individual classes might still be unavailable. For novice users simple solution is to import a fresh copy and build the application again to be good to go.

It is advisable to do a clean install after this.

blocks|key|46488|text|我知道这个线程很老，但是，另一个解决方案是运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46489|$+mvn+clean+install+-Dmaven.test.skip=true|code-block|syntax|javascript|46490|然后在IntelliJ上执行CMD+%2B+Shift+%2BA+(mac+os)+->输入"Reimport+all+Maven+projects“。|46491|如果这不起作用，请尝试强制重新下载maven依赖项|46492|$+mvn+clean+-U+install+-Dmaven.test.skip=true|46493|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I know this thread is old but, another solution was to run

<pre><code>$ mvn clean install -Dmaven.test.skip=true
</code></pre>

And on IntelliJ do CMD + Shift + A (mac os) -> type "Reimport all Maven projects".

If that doesn't work, try forcing maven dependencies to be re-downloaded

<pre><code>$ mvn clean -U install -Dmaven.test.skip=true
</code></pre>

blocks|key|47547|text|如果您使用的是Lombok，请确保启用了批注处理。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47548|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are using Lombok, make sure you have enabled annotation processing.

blocks|key|2734764|text|通过右键单击Java文件夹并重新构建，我解决了这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2734765|​|2734766|📷|atomic|offset|length|2734767|2734768|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/5ed25494e4321c39165eafef8badf4d3.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

I solved this problem doing right click on Java Folder and Rebuild 
<a href="https://i.stack.imgur.com/ghbag.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ghbag.png" alt="IntelliJ screenshot" /></a>

blocks|key|46459|text|对我来说，问题是在Intellij+Idea的java项目中使用Lombok的实验性特性@UtilityClass，将类方法注释为"static“。当我显式地将类的每个方法设置为“静态”而不是使用注释时，所有的编译问题都消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46460|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For my case, the issue was with using Lombok's experimental feature @UtilityClass in my java project in Intellij Idea, to annotate a class methods as "static". When I explicitly made each method of the class as "static" instead of using the annotation, all the compilation issues disappeared.

blocks|key|46726|text|由于这是谷歌搜索"intelliJ找不到符号“错误的第一次命中，所以我也将加入我的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46727|对我来说，问题是我的项目源自Eclipse，并且一些文件包含对由pom.xml中的规范在src/generated-sources中生成的类的依赖。由于某些原因，当我第一次打开项目时，这并没有正确执行，重新构建/重新导入也没有帮助，因此文件从未生成过。|offset|length|style|CODE|46728|解决方案是右键单击模块，然后选择解决了问题的Maven+->+Generate+Sources+and+Update+Folders，我就可以进行编译了。|46729|entityMap^0|0|18|L|0|M|18|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|K|$]]

Since this is the first hit on Google searching for "intelliJ cannot find symbol" error, I'm gonna throw in my solution as well. 

The problem for me was that my project originated from Eclipse, and some files contained dependency on classes that were generated in <code>src/generated-sources</code> by specifications in pom.xml. For some reason, this was not properly executed when I first opened the project and rebuilding/re-importing did not help, so the files were never generated. 

The solution was to right-click on the module, and select <code>Maven -&gt; Generate Sources and Update Folders</code> That solved the issue and I could compile.

blocks|key|46398|text|确保您尝试引用的java类的源文件具有.java扩展名。在我的例子中是.aj+(我必须在创建它的时候点击“创建方面”而不是“创建类”)。IntelliJ为这个文件显示了与"normal“类相同的图标，但编译器在构建时看不到它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|46399|在我的例子中，将.aj更改为.java解决了这个问题。|46400|entityMap^0|J|5|Z|3|0|8|3|E|5|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|I|$]]

Make sure the source file of the java class you are trying to refer to has a <code>.java</code> extension. It was <code>.aj</code> in my case (I must have hit "Create aspect" instead of "Create class" when creating it). IntelliJ shows the same icon for this file as for "normal" class, but compiler does not see it when building.

Changing <code>.aj</code> to <code>.java</code> fixed it in my case.

blocks|key|47439|text|有时，您需要的类位于test源目录中。发生在我身上，不管怎么说，…|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|47440|entityMap^0|A|4|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Sometimes the class you want is in the <code>test</code> source directory. Happened to me, anyway…

blocks|key|46759|text|我也遇到了同样的问题，除了我正在导入依赖关系不能以某种方式解决的类。我刷新了maven项目，重建了项目。它仍然没有解决。看起来IntelliJ错误地缓存了一些东西。我重新启动了IntelliJ，这解决了依赖关系。我猜它以某种方式清除了缓存。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|46760|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I was having the same problem except that I was importing the classes for which dependencies were not resolving somehow. I refreshed maven projects, Rebuild Project. It still did not resolve.
Looks like IntelliJ was caching something incorrectly.
I restarted IntelliJ and that resolved the dependencies. I guess it cleared the cache somehow.

blocks|key|2734525|text|我看到了很多建议构建或重新构建的答案，但以防这不能解决你的问题，只要注意，IDEA可以检测到一个方法，但如果你之前有一个new，它就不会编译，因为它会期待实例。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2734526|​|2734527|📷|atomic|2734528|2734529|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2885ac6f8be14a6e0af4321543b709eb.png|imageAlt^0|1O|3|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|K|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S|T|-4]]]]

I'm seeing a lot of answers proposing a build or a re-build but just in case this don't fix your problem just notice that IDEA can detect a method but it will not compile in case you have a <code>new</code> before as it will be expecting the instance.

<a href="https://i.stack.imgur.com/XDYlj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XDYlj.png" alt="enter image description here"></a>

blocks|key|46956|text|在我的例子中，我在从另一个模块中找到一个类时遇到了问题。在pom.xml中，我只是在指定了<scope>compile</scope>的情况下实现了这个依赖。删除这一行很有帮助。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|46957|entityMap^0|T|7|19|M|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

In my case, I had a problem with finding a class from another module. In <code>pom.xml</code>, I just had this dependency with <code>&lt;scope&gt;compile&lt;/scope&gt;</code> specified. Removing this line helped.

blocks|key|2734630|text|这对我来说是可行的，比如说类A依赖于类B(以及类c，d等)，但是错误抛给了没有任何错误的类A。所以我尝试单独编译A类，首先->it在B类的包上显示错误。所以我试着编译B类的整个包，现在它抛出的是确切的错误类(在我的例子中，B类有错误)。通常，Intellj在编译/构建时使用行号显示确切的错误类。在某些情况下，它会在错误的位置/类中抛出错误。试一试。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2734631|entityMap^0|1X|2Y|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

This works for me, say class A depends on class B(and class c, d etc) but the error throws on class A which does not have any errors. So I try to compile class A alone first -&gt;it shows error on the package of class B. So tried to compile whole package of class B. Now it throws which is the exact error class(on my case class B had error). Usually Intellj shows the exact error class with line number when compile/build. On some occasions it throws error in wrong place/class. Have a try.

blocks|key|2525191|text|有一次，当Maven重新导入，重建项目，无效缓存没有帮助我删除了.idea文件夹中的子文件夹artifacts和libraries，而不是整个文件夹，所以我保存了自定义项目设置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2525192|在此处未写入任何内容时使用...and检查idea.log文件是否为已发布的here|2525193|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/42427510/6721361^0|1A|9|1K|9|0|12|4|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@]|D|@$9|V|A|W|1|X]]|E|$]]|$1|H|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

Once when Maven Reimport, Rebuild Project, Invalidate caches didn't help I deleted subfolders <code>artifacts</code> and <code>libraries</code> from .idea folder, not whole one, so I saved custom project settings.
...and when nothing written here helps check idea.log file as posted <a href="https://stackoverflow.com/a/42427510/6721361">here</a>

blocks|key|2734683|text|对我来说，错误来自@RequiredArgsConstructor(onConstructor+=+@__(@Inject))，消息是cannot+find+symbol+__。上面的错误消息是"java:您没有使用lombok支持的编译器，所以lombok将无法工作，已被禁用“。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2734684|在VM选项中添加下面的参数，就像我建议的那样，here可以工作。|2734685|-Djps.track.ap.dependencies=false|code-block|syntax|javascript|2734686|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/65188047/3255453^0|9|1I|1V|L|0|N|4|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@$9|10|A|11|1|12]]|E|$]]|$1|H|3|I|5|J|7|13|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

For me, the error was coming from <code>@RequiredArgsConstructor(onConstructor = @__(@Inject))</code>, and the message was <code>cannot find symbol __</code>. The error message right above this was &quot;java: You aren't using a compiler supported by lombok, so lombok will not work and has been disabled&quot;.
Adding argument below in VM options worked as suggested <a href="https://stackoverflow.com/a/65188047/3255453">here</a> worked for me.
<pre><code>-Djps.track.ap.dependencies=false
</code></pre>

blocks|key|2734747|text|我试了所有的方法，但对我来说都不管用。因此，在浪费了几个小时之后，我决定对IntelliJ+idea版本进行升级，最终，它成功了！|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2734748|entityMap^0|1I|B|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I tried everything and nothing worked for me. So, after wasting a couple of hours, I decided to upgrade the IntelliJ idea version, and finally, it worked!

blocks|key|2734063|text|我知道这是旧的，但对于其他任何人，请确保缺少的类与您得到错误/调用它的位置的类在同一个包中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2734064|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I know this is old, but for anyone else, make sure that the class that's missing is in the same package as the class where you get the error/where your calling it from.

I make this call to a static singleton instance from the class <code>GameManager.java</code>.

<pre><code>HUD.getInstance().update(timeDelta);
</code></pre>

<code>HUD.java</code> contains the <code>HUD</code> class as well as two other related classes, <code>HUDTextElement</code> and <code>HUDElement</code>. All the classes are in the same root path <code>../src/org/mypackage</code>.

However, when compiling this java project in IntelliJ I get cannot find Symbol HUD on the line I make the <code>HUD.getInstance()</code> call.

This exact same code compiles just fine in eclipse, any idea what the problem is?

Getting "cannot find Symbol" in Java project in Intellij

我从GameManager.java类调用了一个静态单例实例。HUD.getInstance().update(timeDelta);HUD.java包含HUD类以及另外两个相关的类HUDTextElement和HUDElement。所有的类都在相同的根路径../src/org/mypackage中。但是，当我在IntelliJ中编译这个java项目时，我得到在我调用HUD.getInstance

问在Intellij中的Java项目中获得“找不到符号”
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