Interface may be annotated as '@FunctionalInterface'
Reports interfaces that can be annotated with @FunctionalInterface.
Annotating an interface with @FunctionalInterface indicates that the interface is functional and no more abstract methods can be added to it.
Example:
After the quick-fix is applied:
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.
InterfaceMayBeAnnotatedFunctional- 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.
This inspection depends on the Java feature 'Lambda expressions', which is available since Java 8.
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: |