@FunctionalInterface
(available since JDK 1.8).
Annotating an interface with @FunctionalInterface
indicates that the interface
is functional and no more abstract
methods can be added to it.
Example:
interface FileProcessor {
void execute(File file);
}
After the quick-fix is applied:
@FunctionalInterface
interface FileProcessor {
void execute(File file);
}
This inspection only reports if the language level of the project or module is 8 or higher.