# [JEP 485](https://openjdk.org/jeps/485) examples

Source: https://openjdk.org/jeps/485

```java
List<List<Integer>> windows = Stream.iterate(0, i -> i + 1)
    .gather(Gatherers.windowFixed(3))
    .limit(2)
    .toList();
// [[0, 1, 2], [3, 4, 5]]
```

```java
List<Integer> prefixSums = Stream.of(1, 2, 3, 4)
    .gather(Gatherers.scan(() -> 0, Integer::sum))
    .toList();
```