how to use IgnoreUnnamedModuleForSplitPackage

[huige007]

As described in title, how can i enable feature IgnoreUnnamedModuleForSplitPackage. Because I got following error msg in vscode-java(redhat.java)
The package java.util.concurrent is accessible from more than one module: , java.base

after I set the java.jdt.ls.java.home to jdk8, above error msg disappeared

[rgrunber]

@snjeza pointed out we set the option by default at

eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/preferences/PreferenceManager.java

Line 166 in 27a1a1e

javaCoreOptions.put(JavaCore.COMPILER_IGNORE_UNNAMED_MODULE_FOR_SPLIT_PACKAGE, JavaCore.ENABLED);

. What version of vscode-java are you using ? This would have been the default since vscode-java 1.12.0.

You should also be able to set this option using java.settings.url. See https://github.com/eclipse-jdtls/eclipse.jdt.ls/wiki/Language-Server-Settings-&-Capabilities#java-compiler-options.

.vscode/settings.json

{
	"java.settings.url": ".vscode/settings.prefs"
}

.vscode/settings.prefs

org.eclipse.jdt.core.compiler.ignoreUnnamedModuleForSplitPackage=enabled

[rgrunber]

I think we can close this in favour of redhat-developer/vscode-java#3505 since there's some more information there.

[huige007]

I am using the Language Support for Java(TM) by Red Hat (version: v1.28.1) in vscode
I also add java.settings.url and org.eclipse.jdt.core.compiler.ignoreUnnamedModuleForSplitPackage=enabled, but I still get the same error msg, is there any way that I can confirm that the options is working?