Fibonacci Series Java Program Using Stream API

In the previous post, I showed a Fibonacci series Java program using for loop and Fibonacci Series Java Program Using Recursion.

In this Java program, I show you how to calculate the Fibonacci series of a given number using Java 8 streams.

Fibonacci series is a sequence of values such that each number is the sum of the two preceding ones, starting from 0 and 1. The beginning of the sequence is thus:
```
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144 ...
```

Fibonacci Series Java Program Using Stream API

package net.javaguides.corejava.programs;

import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class FibonacciStreamProgram {

    public static List < Integer > fibonacci(int limit) {

        return Stream.iterate(new int[] {
                0,
                1
            }, t - > new int[] {
                t[1], t[0] + t[1]
            })
            .limit(limit)
            .map(n - > n[0])
            .collect(Collectors.toList());
    }

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter a number: ");

        int n = scanner.nextInt();

        System.out.println(fibonacci(n) + "\t");

        scanner.close();
    }
}

Output

Enter a number: 10

[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

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