Splitting List into sublists along elements

Question

I have this list (List):

[\"a\", \"b\", null, \"c\", null, \"d\", \"e\"]

And I\'d like something like this:

Answer 1

This is a very interesting problem. I came up with a one line solution. It might not very performant but it works.

List<String> list = Arrays.asList("a", "b", null, "c", null, "d", "e");
Collection<List<String>> cl = IntStream.range(0, list.size())
    .filter(i -> list.get(i) != null).boxed()
    .collect(Collectors.groupingBy(
        i -> IntStream.range(0, i).filter(j -> list.get(j) == null).count(),
        Collectors.mapping(i -> list.get(i), Collectors.toList()))
    ).values();

It is a similar idea that @Rohit Jain came up with. I'm grouping the space between the null values. If you really want a List<List<String>> you may append:

List<List<String>> ll = cl.stream().collect(Collectors.toList());