eclipse/subclipse 项目未显示红线错误
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eclipse/subclipse project not showing red line errors
提问by user1007531
I'm working on a group project for school. I checked the project out from the repository. When I write code, the red lines for syntax errors don't show up. So I made a separate java project on my machine and red line errors do show up there. So I don't know whats going on.
我正在为学校做一个小组项目。我从存储库中检出了该项目。当我编写代码时，语法错误的红线不显示。所以我在我的机器上做了一个单独的 java 项目，那里确实出现了红线错误。所以我不知道发生了什么。
回答by john
Eclipse suddenly stopped showing compile errors, both in the code and in the Problems view.
Eclipse 突然停止在代码和问题视图中显示编译错误。
I had created a Dynamic Web Project, added a servlet and everything was groovy; compilation errors showed up properly.
我创建了一个动态 Web 项目，添加了一个 servlet，一切都很好；编译错误正确显示。
I did right click on MyProject->Configure->ConvertToMavenProject and problems started. In my BuildPath, the JRE version was changed from 1.6 to 1.5; this caused some previously unreported compilation problems that went away as soon as I change back to 1.6.
我没有右键单击 MyProject->Configure->ConvertToMavenProject 并且问题开始了。在我的BuildPath中，JRE版本从1.6改为1.5；这导致了一些以前未报告的编译问题，一旦我改回 1.6，这些问题就消失了。
But now, no compilation errors showed up in the code.
但是现在，代码中没有出现编译错误。
The reason was, converting to a maven project also removed my src folder from the build path. I added the src folder back to the build path and things are peachy.
原因是，转换为 maven 项目也会从构建路径中删除我的 src 文件夹。我将 src 文件夹添加回构建路径，事情很顺利。
回答by Arend v. Reinersdorff
Right-click your project and go to Properties > Java Build Path > Source.
右键单击您的项目并转到Properties > Java Build Path > Source。
Make sure your source directory (for example MyProject/src) is listed as a Source folder. Otherwise you won't get any red markers.
确保您的源目录（例如MyProject/src）被列为源文件夹。否则你不会得到任何红色标记。
回答by polster
I had this problem as well. After a project --> clean, I'm back to normal.
我也有这个问题。经过一个项目 --> 干净，我恢复了正常。
Edit ... Happened again - realized that I had accidentally unchecked the "Project --> build-automatically" menu option. Now working as expected.
编辑...再次发生 - 意识到我不小心取消了“项目 --> 自动构建”菜单选项。现在按预期工作。
回答by user3764792
Go to check whether in your Java Build Path -> Libraries has a missing jar. When I remove that missing jar in my case, the auto-error shows again.
去检查您的 Java Build Path -> Libraries 中是否缺少 jar。当我在我的情况下删除丢失的 jar 时，自动错误再次显示。
回答by Dave Newton
Squiggles are configurable; in Preferences see General -> Appearance -> Editors -> Text Editors -> Annotations and the "Errors" annotation type.
波浪线是可配置的；在 Preferences 中看到 General -> Appearance -> Editors -> Text Editors -> Annotations 和“Errors”注释类型。
回答by jbranchaud
Make sure your .project file looks something like this:
确保您的 .project 文件如下所示：
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>ProjectName</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>
If it doesn't look like the above, then you aren't going to get syntax checking, as well as a number of other features that come along with Java projects.
如果它看起来不像上面那样，那么您将无法进行语法检查以及 Java 项目附带的许多其他功能。
