Class, interface, or method should not be extended
Reports classes, interfaces and methods that extend, implement, or override API elements marked with @ApiStatus.NonExtendable.
The @ApiStatus.NonExtendable annotation indicates that the class, interface, or method must not be extended, implemented, or overridden. Since casting such interfaces and classes to the internal library implementation is rather common, if a client provides a different implementation, you will get ClassCastException. Adding new abstract methods to such classes and interfaces will break the compatibility with the client's implementations.
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.
NonExtendableApiUsage- 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.
Suppressing Inspection
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
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By default bundled with: |