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

Rewrite object-oriented code using functional techniques. Get started with lambdas, method references, functional interfaces, and the Streams API in Java ...

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.

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 ...