BooleanSupplier, LongSupplier, DoubleSupplier LongUnaryOperator, DoubleUnaryOperator, IntUnaryOperator As you can see, the various Java functional interfaces simply provide a somewhat different spin ...

Consumer<String> consumer = (s) -> System.out. println (s); The compiler analyzes the previous declaration and determines that the java.util.function.Consumer predefined functional interface’s ...

Consumer<String> consumer = (s) -> System.out. println (s); The compiler analyzes the previous declaration and determines that the java.util.function.Consumer predefined functional interface’s ...

Interested in Java functional programming? The first place you need to start, especially if you use the Streams API, is with this Java Function interface example.