Fibonacci value n position with Java 8 Stream API

FibonacciStream.java

package algorithms.streams;

import java.math.BigInteger;
import java.util.stream.Stream;

/**
 *
 * @author Maikel Chandika ([email protected])
 *
 * to calculate Fibonacci n position with Java 8 Stream API. 
 * Support large number of n calculation (Using BigInteger).
 * 
 */
public class FibonacciStream {

    public static void main(String[] args) {
        System.out.println(calFibs(50)); // 12586269025
        System.out.println(calFibs(1000)); // too long ;)
    }

    static java.math.BigInteger calFibs(int n) {
        return Stream.iterate(new BigInteger[]{BigInteger.ZERO, BigInteger.ONE}, s -> new BigInteger[]{s[1], s[0].add(s[1])})
                .limit(n)                
                .reduce((x, y) -> y).orElse(null)[1];
    }
}