javaLambda [http://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html]

java.util.function Interface Predicate

Type Parameters: T - the type of the input to the predicate Functional Interface: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface PredicateRepresents a predicate (boolean-valued function) of one argument. This is a functional interface whose functional method is test(Object).

Since: 1.8

java.util.function Interface Function<T,R>

Type Parameters: T - the type of the input to the function R - the type of the result of the function All Known Subinterfaces: UnaryOperator Functional Interface: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface Function<T,R>Represents a function that accepts one argument and produces a result. This is a functional interface whose functional method is apply(Object).

Since: 1.8

java.util.function Interface Consumer

Type Parameters: T - the type of the input to the operation All Known Subinterfaces: Stream.Builder Functional Interface: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface ConsumerRepresents an operation that accepts a single input argument and returns no result. Unlike most other functional interfaces, Consumer is expected to operate via side-effects. This is a functional interface whose functional method is accept(Object).

Since: 1.8