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Type parameter extends 'final' class

Reports type parameters declared to extend a final class.

Suggests replacing the type parameter with the type of the specified final class since final classes cannot be extended.

Example:

void foo() { List<? extends Integer> list; // Warning: the Integer class is a final class }

After the quick-fix is applied:

void foo() { List<Integer> list; }

This inspection depends on the Java feature 'Generics' which is available since Java 5.

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024