blocks|key|897073|text|有一个Problems视图(try+Window->Show+View)显示了这种情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|897074|它通常缺少jar+(例如，您的项目配置引用了一个不存在的jar)，诸如此类的事情，在JDT的情况下，但很明显，如今Eclipse可以以许多方式使用，它可以是任何东西。|897075|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|$]]

There is a Problems view (try Window->Show View) which shows this kind of thing.

It's usually missing Jars (eg your project configuration references a jar that isn't there), and that kind of thing, in the case of JDT, but obviously these days Eclipse can be used in so many ways, it could be anything.

blocks|key|680387|text|我也遇到过几次这个问题，我可以通过删除"Problems"-tab中的消息并重新构建项目来“解决”它。选择项目并单击菜单栏上的Project+->+Clean...再次选择您的项目，然后确定。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|680388|entityMap^0|1R|J|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 also had this problem several times and I could 'solve' it by just deleting the messages in the "Problems"-tab and building the project again. Select the project and click on the menu bar <code>Project -&gt; Clean...</code> select your project again and okay.

blocks|key|680541|text|构建路径中可能已经存在一些已删除的jar文件。右键单击项目。Properties->Java构建路径，并从其中删除已删除的jar文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|680542|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|$]]

There might be some deleted jar files already in build path. Right click on project. Properties->Java Build Path and removed deleted jar files from there.

blocks|key|681213|text|这可能是一个构建问题。修复我的问题是用maven更新项目(Alt+%2B+F5)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|681214|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 probably a build problem. What fixed mine was updating the project with maven (Alt + F5)

blocks|key|680933|text|转到项目->，右键单击->属性->+Java生成路径->库|type|unstyled|depth|inlineStyleRanges|entityRanges|data|680934|删除图标上有红色十字符号的所有罐子。|680935|已解决。|680936|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Go to
Project -> right click -> properties -> Java Build Path -> Libraries

Delete all the JARs which have red cross symbol on the icon.

Resolved.

blocks|key|897656|text|在Eclipse工具中将循环依赖标记为"Warning“，以避免”在构建路径中检测到循环“错误。在Eclipse中:->+Windows首选项->+->+->编译器->构建->循环依赖|type|unstyled|depth|inlineStyleRanges|entityRanges|data|897657|谢谢|897658|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|$]]

Mark Circular dependcies as "Warning" in Eclipse tool to avoid "A CYCLE WAS DETECTED IN THE BUILD PATH" error. In Eclipse got to :-> Windows -> Prefereneces -> Java-> Compiler -> Buliding -> Circular Depencies

Thanks

blocks|key|898081|text|这意味着在配置构建路径/将jar添加到项目中时，您给定的路径中缺少jar文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|898082|只需再次配置jars即可。|898083|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|$]]

It means the jar files are missing from the path that you have given while configuring Build Path/adding jars to the project.

Just once again configure the jars.

blocks|key|680473|text|这不是一种奇怪的行为吗？在我的例子中，错误是我添加了一个jar-lib。但是这个库有问题，所以我删除了库。但是，无论我做了什么，错误仍然存在。我删除了jar文件，甚至使用了eclipse选项"remove+from+build-path"，在我的项目文件夹中删除了它，并清理了我的项目，但都没有起作用。只有在我按照Qwert描述的方式做完之后，它才能工作。但是IDE不应该独立于错误消息吗？错误已修复，只有消息导致了问题。感谢Qwert+(如果我有足够的声誉，我会投票给你的答案。但现在我不能，对不起)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|680474|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|$]]

Isn´t it a strange behavior? In my case, the mistake was that I added a jar-lib. But this lib was faulty, so I removed the lib. But, no matter what I´ve done, the error still exists. I removed the jar-file, even with the eclipse option "remove from build-path", deleted it on my project-folders and cleaned my project, but nothing worked. Only after I´ve done the way Qwert has described, it worked. But sould an IDE not independent from error messages? The error was fixed, only the messages caused the problem. Thanks to Qwert (if I got enough reputations, I will vote your answer. But now I am not able to, sorry).

blocks|key|680608|text|这可能是因为一个原因，如果一个项目包含库项目，那么您需要先清除已使用的库项目，然后清除包含该库项目的项目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|680609|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 may for one reason, If a project contains library project then you need to clean first the library project have been used, then clean the project contains that library project.

blocks|key|680721|text|我有一个maven项目给了我同样的东西。它显示它找不到具有该版本(依赖项)的jar，我知道它在那里并且是正确的-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|680722|因此，对我来说，解决方案是1删除本地存储库。2清理项目。3禁用maven性质。4生成eclipse工件，5将其重新配置为maven项目。|680723|(按顺序)|680724|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had a maven project giving me same thing. It showed that it couldnt find the jar with that version (dependency) and I knew its there and is correct - 

So, for me the solution was to 
1 delete the local repository. 
2 Clean the project. 
3 Disable the maven nature.
4 Generate eclipse artifacts and 
5 re-configure as maven project.

(in order)

blocks|key|897550|text|我的问题是关于感叹号的部分：“右键单击项目文件夹”-“属性-库”选项卡。在libray上有一个红色标记的错误，可能不在正确的位置，所以我删除了它并进行了处理。马克消失了。删除一些旧项目后出现的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|897551|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|$]]

My problem concerning exclamation mark was in the section: "right click on project folder" - Properties - Libraries tab.
There was an Error marked in red on a libray that probably wasn't in the right place so I removed it and ex. mark disappeared.
The problem raised after deleting some old projects.

blocks|key|897606|text|我有同样的problem....the实际问题是缺少.jar文件，这是因为更改了我的工作空间。我刚刚从我的新工作区删除了appcompat文件夹(其中有“.jar”文件)，并从我的旧工作区复制了它。这解决了我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|897607|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....the actual issue was missing .jar file which took palce coz of changing my workspace.
i just deleted the appcompat folder(which has the".jar" file) from my new workspace and copied it from my old workspace.
this solved my problem.

blocks|key|680999|text|发生这个问题主要是因为你的库文件被删除了。像以前一样运行项目的简单方法是:+1)转到project+properties+2)选择java+Build+Path+3)删除除jre之外的所有库。4)现在通过点击“添加外部jars”来添加相同的jar文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|681000|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|$]]

Mainly this problem occurs because your library files get deleted.
The simple way to work your project as it was working previously is 
1) Go to Project properties
2) Select java Build Path
3) Remove all library except jre.
4) Now add the same same jar file by clicking "Add external jars".

blocks|key|897818|text|使用这个简单的步骤，右键单击项目->属性->java构建路径->单击jre系统库并在该步骤之后删除它，然后单击Add+library并添加一个新的jre系统库来解析它！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|897819|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|$]]

use this simple steps right click on the project->properties ->java Build path-> click on the jre system library and remove it after that step click on Add library and add a new jre system library that will resolve it!

blocks|key|897860|text|对于Maven项目，从集成开发环境中删除该项目并运行maven命令:-mvn+eclipse:clean，mvn+eclipse:eclipse，mvn+clean+install+-e+.After+this导入集成开发环境中的项目。这玩意对我很管用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|897861|entityMap^0|Z|H|1H|J|21|K|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 Maven project delete the project from IDE and run the maven command :-<code>mvn eclipse:clean</code> ,<code>mvn eclipse:eclipse</code>,<code>mvn clean install -e</code> .After this import the project on IDE. This stuff is works for me.

blocks|key|681188|text|这与本地存储库.m2中相同依赖关系的多个版本相关|type|unstyled|depth|inlineStyleRanges|entityRanges|data|681189|转到您的eclipse+>问题选项卡>查看错误>转到本地.m2文件夹|681190|删除您最近添加的依赖项的所有不相关版本。|681191|然后尝试重新构建项目。|681192|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|$]]

This is related to multiple versions of same depenendency in the local repository .m2

go to ur eclipse > problems tab > see the errors > go the local .m2 folder

delete all the non relevant versions of the the dependency which you have added recently.

then try to rebuild the project.

blocks|key|681283|text|我也面临着这种奇怪的情况。我所知道的是，早些时候我用spring+1.5.4版本运行我的Spring项目，后来我选择了2.0.1版本。这就是我遇到这个错误的时候。当我访问POM并手动将Spring版本改为1.5.4时，这个错误就消失了。我猜maven会根据指定的Spring版本下载所需的JAR。如果您更改了版本，maven将不会下载JAR，前提是这些JAR已经为以前的Spring版本下载过，并且位于C：->+Users+->“Logged+in+-User-+->”->+.m2路径的JAR源文件夹中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|681284|我再次做的是保持Spring版本的原样(如2.0.1)，如前所述，我打开了Problems视图，通过访问.m2文件夹，我删除了Problems视图中说没有找到的JAR(路径在Problems视图中提到，因为JAR是)。然后我更新了maven，所有的问题都消失了。|681285|这就是我得出的结论，问题出在JAR上，这些JAR是在.m2文件夹中为以前的Spring版本下载的。|681286|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I too faced this strange situation. What I got to know is that, earlier I ran my spring projects with Spring version 1.5.4 and later for one project I chose version 2.0.1. That's when I got this error. When I visited POM and changed Spring version to 1.5.4 manually, the error was gone. What I guess is that, maven downloads the required JARs according to the Spring version specified. If you change the version, maven won't download JARs if those JARs are already downloaded for previous Spring version and found in .m2 source folder found as C: -> Users -> "Logged-In-User-Name" -> .m2 path. 

What I did again was to keep the Spring version as it is (as 2.0.1), I opened the Problems view as said earlier and I deleted the JARs which were said as not found in the Problems view by visiting .m2 folder (the Paths were mentioned in the Problems view for were the JARs are). I then updated the maven and all problems were gone.

That's how I conclude that the problem was with JARs which were downloaded for the previous Spring versions in .m2 folder.

blocks|key|898094|text|在我的例子中，这是不正确的/不正确的依赖|type|unstyled|depth|inlineStyleRanges|entityRanges|data|898095|Markers+>+Problems正在突出显示spring/.gradle/cache/httpcomponents.......pom+is+not+valid+archive|offset|length|style|CODE|898096|我删除了|898097|compile+group:+'org.apache.httpcomponents',+name:+'httpcomponents-client',+version:+'4.5.6',+ext:+'pom'|898098|更改为|898099|compile+group:+'org.apache.httpcomponents',+name:+'httpclient',+version:+'4.5.6'|898100|entityMap^0|0|O|1U|0|0|0|2V|0|0|0|28|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@$D|X|E|Y|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|Q|$]]

In my case this is incorrect/improper dependency

Markers > Problems is highlighting
<code>spring/.gradle/cache/httpcomponents.......pom is not valid archive</code>

I removed

<code>compile group: 'org.apache.httpcomponents', name: 'httpcomponents-client', version: '4.5.6', ext: 'pom'</code>

changed to 

<code>compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.5.6'</code>

blocks|key|898130|text|如果您使用的是maven+pom.xml，那么请检查您是否对poi-ooxml-schemas使用了依赖关系。当我使用3.17版本时，我收到了红色的感叹号。将版本更改为4.1.2，maven上的红色感叹号消失。换句话说，我想说的是，使用一个更新的版本，这可能会有帮助！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|898131|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 maven pom.xml then check whether you have used dependency for poi-ooxml-schemas. I was getting the red exclamation as I was using version 3.17. Changed the version to 4.1.2 and the red exclamation on maven disappeared. In other words what I meant to say was, use an updated version, this may help!!!

blocks|key|681137|text|对我有效的方法(可能到目前为止还没有回答)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|681138|在处理Selenium项目和ANT时，我复制了来自两个不同来源的两个不同的"BUILD.xml“文件，并将它们放在项目的根目录中。这导致了这个红色的感叹号，当我将一个BUILD.xml文件移到另一个文件夹时，它就消失了。|681139|至于“为什么我在一个项目中有两个BUILD.xml文件？”，我实际上是在玩弄各种BUILD.xml文件中的ANT配置。|681140|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

<h2>What worked for me (and probably not yet answered here till now) ::</h2>

While working on a Selenium project and ANT, I had copied and placed TWO different "BUILD.xml" files from 2 different sources in the Project's ROOT directory. This resulted in this RED-EXCLAMATION-MARK, which disappeared as soon as I moved one of the BUILD.xml file to another folder.

As to "why I had two BUILD.xml files in ONE project?", I was actually playing around with ANT's config from various BUILD.xml files.

I have a red exclamation mark over my project name in Eclipse, looking like this - <a href="https://i.stack.imgur.com/QOKrq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/QOKrq.png" alt="enter image description here"></a>.

Does anyone know what this means and what I should I do about it?

What is the reason for a red exclamation mark next to my project in Eclipse?

集成开发环境

编译器

Windows

Eclipse

Java

在Eclipse中，我的项目名称上方有一个红色感叹号，如下所示-。有没有人知道这意味着什么，我应该怎么做？

问在Eclipse中，我的项目旁边出现红色感叹号的原因是什么？
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问在Eclipse中，我的项目旁边出现红色感叹号的原因是什么？
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