Streams.java

// given
Stream<Integer> infiniteStream = Stream.iterate(0, i -> i + 2);
 
// when
List<Integer> collect = infiniteStream
  .limit(10)
  .collect(Collectors.toList());
 
// then
assertEquals(collect, Arrays.asList(0, 2, 4, 6, 8, 10, 12, 14, 16, 18));

---------------------------------

int[] fibs = {0, 1};
Stream<Integer> fibonacci = Stream.generate(() -> {
    int result = fibs[1];
    int fib3 = fibs[0] + fibs[1];
    fibs[0] = fibs[1];
    fibs[1] = fib3;
    return result;
});