Same file subclasses are missing from permits clause of a sealed class

Reports sealed classes without an explicit permits list. Sealed classes that only have subclasses in the same file are not required to have an explicit permits list. By default, this inspection does not highlight in the editor, but only provides a fix.

Example:

  sealed class A {}
  final class B extends A {}

After the quick-fix is applied:

  sealed class A permits B {}
  final class B extends A {}

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

FillPermitsList

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Code style issues

This inspection depends on the Java feature 'Sealed classes', which is available since Java 17.

New in 2020.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,
Can be installed with plugin:	Java, 243.26483

01 April 2025