Quelles sont les surcharges de Java Réduire ?

Optional reduce(BinaryOperator accumulator)

T result = a[0]; for (int i = 1; i < n; i++) { result = accumulator.apply(result, a[i]); } return result;

T reduce(T identity, BinaryOperator accumulator)

T result = identity; for (int i = 0; i < n; i++) { result = accumulator.apply(result, a[i]); } return result;

 U reduce(U identity, BiFunction accumulator,BinaryOperator combiner);