Inheritance of Kotlin sealed interface/class from Java

Last modified: 03 December 2024

Reports attempts to inherit from Kotlin sealed interfaces or classes in Java code.

Example:

// Kotlin file: MathExpression.kt

sealed class MathExpression

data class Const(val number: Double) : MathExpression()
data class Sum(val e1: MathExpression, val e2: MathExpression) : MathExpression()
// Java file: NotANumber.java

public class NotANumber extends MathExpression {
}

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.

KotlinSealedInheritorsInJava
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 | Kotlin | Java interop issues

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Kotlin, 243.23126-IJ