OnJava8-Examples/generics/Fibonacci.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

Repository navigation

// generics/Fibonacci.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Generate a Fibonacci sequence

import java.util.function.*;

import java.util.stream.*;

public class Fibonacci implements Supplier<Integer> {

private int count = 0;

@Override

public Integer get() { return fib(count++); }

private int fib(int n) {

if(n < 2) return 1;

return fib(n-2) + fib(n-1);

}

public static void main(String[] args) {

Stream.generate(new Fibonacci())

.limit(18)

.map(n -> n + " ")

.forEach(System.out::print);

}

/* Output:

1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597

2584