Run Java: Clean Java Language Server Workspace on command palette
- In my case, I have no settings files like
.project,./settings/...files
Run Java: Clean Java Language Server Workspace on command palette
- In my case, I have no settings files like
.project,./settings/...files
In my case, I solved the problem by creating a new Java Project, and comparing the files that were generated.
In particular I found missing entries in .project
Copy<buildSpec>
<buildCommand> <!-- was missing -->
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature> <!-- was missing -->
<nature>org.eclipse.m2e.core.maven2Nature</nature>
</natures>
also some settings in .settings/org.eclipse.jdt.core.prefs were missing but they did not immediately fixed the problem until I added the above.
Of course, you need to clean the workspace everytime you make a change (with the ... -> clean workspace or the command palette Java > clean Java Language server workspace
Videos
So I'm trying to add jar files to a java project.
I've been told the following:
If you want a more beginner-friendly way of adding libraries, you can also use the Project Manager for Java extension, which is included in the Java Extension Pack. With it, you can click the + icon on Referenced Libraries in the JAVA PROJECTS view, as shown in this example. A quick tip if you need to add many libraries from a folder is to Shift or Alt + click the + icon, which will let you select an entire folder containing multiple .jar files.
After installing Project manager extension and creating a new Java project in VS code, I get to this screen.
As mentioned by VS code, I should be able to see the project view tab after creating my java project. The issue is I don't see the project view tab as shown in the image above. [code says I should see the 3 dots by the explorer subheading to enable it, but again, I don't have these 3 dots as shown in the first image.
I have both project manager and the extension pack installed, so I really don't understand why I cant see or enable project view.
Any suggestions on enabling project view?
Have you tried to open a java file? Because the extension activated depends on the opened filename extension.
You can refer to here.
If it still does not work, could you provide the OS and the versions of the VSCode and extensions?
Anyway, you can try the following 2 steps:
- open a
.javafile - reboot your vscode
I have found the solution, by adding -Xlog:jni+resolve=off to java.jdt.ls.vmargs and it's solved
First, you must install everything from the Extension Pack for Java and the Language Support for Java(TM) by Red Hat extension.
Second, you have to make sure you open the correct project folder. Because VS Code takes the opened folder as the workspace, So pay attention to the folder hierarchy you open.
VSCode just an Editor, after you install some extensions, it only makes the editor more convenient, get more abilities even can help you develop the project of some kind of language through combine with the language support in your computer. Such as, you need to install JDK, then to install the 'Java' extension, then the extension to combine with the JDK and the VSCode, then you will get the ability to develop java project in VSCode.
That's means, The 'Language Support for Java(TM) by Red Hat' has nothing to do with java development. For example, after you install the JDK on your computer, you can develop java projects in the other IDEAs such as Intellij IDEA or some others. The 'Language Support for Java(TM) by Red Hat' extension just to combine the JDK with VSCode better, to make VSCode better to develop java project.
As you said, you failed to import libraries. Of course, the 'Java' extension without any libraries of java. You need to configure it by yourself. In the Explorer panel, you can find 'JAVA PROJECTS'. In it, you can find which libraries you have referenced and you can adds libraries in it. And of course, you'd better take maven to manage your project.
By the way, recommend you to install 'Java Extension Pack' extension.
You're going to need to add support through extensions because by default VS Code does not support Java. The great thing about this extension is that you get a slue of other extensions as well, such as; maven, debugging tools, support for junit, auto completion, etcetera.
On a side note, you could always use an IDE/IDEA like IntelliJ, Eclipse, or likewise. I'm definitely partial to IntelliJ but they all have their pro's and con's.
I moved my project to my new laptop to keep working on it, but immediately VSCode started bombing me with errors in every line and I don't understand why this is happening. I had this issue before, it was because my PATH variable wasn't correct, but this time it's fine and working, I can compile and run my project from the cmd without a problem. That's why I think this might be a problem with VSCode and not my PATH...
I get a "Unbound classpath container: 'JRE System Library [jdk-17.0..0]' in project 'ArtGallery'" problem, but trying solutions from https://stackoverflow.com/questions/45743779/visual-studio-code-java-import-errors-and-more#comment106843655_50821279 didn't help it. So now I don't know what to do. Please, help me... I don't want to be stuck with a notepad and the cmd forever...
Also configured my Java Runtime settings.json:
{"editor.suggestSelection": "first","vsintellicode.modify.editor.suggestSelection": "automaticallyOverrodeDefaultValue","java.configuration.runtimes": [
],"java.jdt.ls.java.home": "c:\\Program Files\\Java\\jdk-17"}
This is a screenshot from my Problems window in VSCode: