Need absolute path for third librairies

[Raidez]

I can't add manually my jar to my project in any way.

First, I made a lib folder and add on the configuration file :

{
    "java.compile.nullAnalysis.mode": "disabled",
    "java.project.referencedLibraries": [
        "lib/**/*.jar"
    ]
}

Didn't works, the jar is not referenced.

I tried to add it with the project setting pane, get an error :

!ENTRY org.eclipse.jdt.ls.core 4 2 2026-02-12 07:53:10.315
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jdt.ls.core".
!STACK 0
org.eclipse.jdt.internal.core.ClasspathEntry$AssertionFailedException: Path for IClasspathEntry must be absolute: lib/HyUI-0.8.4-all.jar
	at org.eclipse.jdt.core.JavaCore.newLibraryEntry(JavaCore.java:5430)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.convertClasspathEntry(ProjectCommand.java:351)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.updateClasspaths(ProjectCommand.java:244)
	at org.eclipse.jdt.ls.core.internal.JDTDelegateCommandHandler.executeCommand(JDTDelegateCommandHandler.java:104)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:618)
	at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
	at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

!ENTRY org.eclipse.jdt.ls.core 4 0 2026-02-12 07:53:10.317
!MESSAGE Error in calling delegate command handler
!STACK 0
org.eclipse.jdt.internal.core.ClasspathEntry$AssertionFailedException: Path for IClasspathEntry must be absolute: lib/HyUI-0.8.4-all.jar
	at org.eclipse.jdt.core.JavaCore.newLibraryEntry(JavaCore.java:5430)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.convertClasspathEntry(ProjectCommand.java:351)
	at org.eclipse.jdt.ls.core.internal.commands.ProjectCommand.updateClasspaths(ProjectCommand.java:244)
	at org.eclipse.jdt.ls.core.internal.JDTDelegateCommandHandler.executeCommand(JDTDelegateCommandHandler.java:104)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler$1.run(WorkspaceExecuteCommandHandler.java:230)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
	at org.eclipse.jdt.ls.core.internal.handlers.WorkspaceExecuteCommandHandler.executeCommand(WorkspaceExecuteCommandHandler.java:220)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$4(JDTLanguageServer.java:618)
	at org.eclipse.jdt.ls.core.internal.BaseJDTLanguageServer.lambda$0(BaseJDTLanguageServer.java:87)
	at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(Unknown Source)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

The only solution/workaround I found, it's to put the jar outside of my project and use the project setting pane.

[github-actions]

Hi @Raidez, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

Solution

• Use an absolute path (or workspace‐folder variable) in your java.project.referencedLibraries setting. For example in .vscode/settings.json:

  {
    "java.project.referencedLibraries": [
      "${workspaceFolder}/lib/**/*.jar"
    ]
  }

  Then reload the window. The glob will expand to full paths and the JARs should appear under “Referenced Libraries”.
• You can also manually edit your .classpath:

  <classpathentry kind="lib" path="${workspaceFolder}/lib/HyUI-0.8.4-all.jar"/>

Workaround

• If you must use the Project Settings UI, pick a JAR outside your workspace (so the picker returns an absolute path).

Known Issue / Duplicate

• Adding a library from inside the workspace via Add Library UI currently always uses a relative path and fails. See:
  • Absolute path error vscode-java-pack#1498

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!