Accessing stream in random order

[Tiramisu Mokka]

Hi all,

The Stream API makes a great job to work with various collections.
However some simple
operations are quite hard to achieve, for example collect the result
into a random order list.

The best solution I came with is:

 Arrays.asList("a", "b", "c", "d").stream()
    .collect(collectingAndThen(toList(), l -> {
Collections.shuffle(l); return l;}));

If Collections#shuffle would return the shuffled list, then this can
be written even more elegant:


 Arrays.asList("a", "b", "c", "d").stream()
    .collect(collectingAndThen(toList(), Collections::shuffle));

Thus two questions:

1) why stream has a way to sort, but not to shuffle
2) why Collections#shuffle doesn't returns the suffld list

Are there objectives to address those cases?

Thanks in advance,
-kofemann

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