Java 8 Tutorial 08 :- Function Interface in Java | Predefined Functional Interfaces

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In Java 8, Function is a functional interface. It takes an argument (object of type T) and returns an object (object of type R).

As per documentation :-

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

The functional method is apply :-
R apply(T t)

T: denotes the type of the input argument
R: denotes the return type of the function

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[satendrashakya]

Very good videos about functional Interface, can you please provide few tutorials regarding BiPredicate and BiFunction also.