Set the following property:

"java.settings.url": "/home/<your_name>/settings.prefs",

The property can point to an URL or a local file path.

You can also define the settings preferences in your project's .settings/org.eclipse.jdt.core.prefs. It will override global settings.

The best way to create those preferences is to edit it in Eclipse.

In Eclipse, right-click on your project, open Window >Preferences > Java Code Style > Formatter, Window >Preferences > Java > Code Style > Organize Imports, Window >Preferences > Java > Compiler > Errors/Warnings and create a new settings file :

The preferences file can be exported using File > Export > General > Preferences. You can use this file to define java.settings.url.

See the Java Compiler Options