Java Formatter settings are not used

If I open the flow-server project from https://github.com/vaadin/flow/tree/main/flow-server

and have Eclipse formatter settings set to use https://raw.githubusercontent.com/vaadin/flow/main/eclipse/VaadinJavaConventions.xml which defines <setting id="org.eclipse.jdt.core.formatter.tabulation.size" value="4"/>

then when I open e.g. the HandlerHelperTest.java file, VS Code shows "Spaces: 8" in the bottom bar and formatting the file changes it to use indentation of 8 spaces instead of 4

The settings file should be fine because when I go back to command line and run mvn formatter:format in the project, the indentation is changed back to 4 spaces.

Environment

• Operating System: macOs Ventura
• JDK version: 17
• Visual Studio Code version: 1.76.2
• Java extension version: 1.16.0

Steps To Reproduce

1. See above

Current Result

File is not formatted according to given settings

Expected Result

File is formatted according to given settings

Reproduce the issue by opening flow-server with VaadinJavaConventions.xml configured in VS Code, then compare formatting HandlerHelperTest.java with the result of mvn formatter:format. Trace how the Java extension reads and applies formatter settings. Done means VS Code uses the configured four-space indentation consistently with the Maven formatter.