An elegant way to specify initial capacity of Collector in java stream api

Question

I've tried to find a good way to set up initial capacity of collector in java stream api. The simplest example is there:

data.stream()
        .collect(Collectors.toList());

I just want to pass an int with size of list into collector in order not to resize internal array. The first intention is to do it in such way:

data.stream()
        .collect(Collectors.toList(data.size()));

But unfortunately toList isn't overloaded to work with parameter. I found one solution but it smells:

 data.stream()
        .collect(Collectors.toCollection(() -> new ArrayList<>(data.size())));

Is there any way to express it simplier?

Answer 1

I'd take your inelegant

Collectors.toCollection(() -> new ArrayList<>(data.size()))

and wrap it in a static method

public static <T> Collector<T, ?, List<T>> toList(int size) {
    return Collectors.toCollection(() -> new ArrayList<T>(size));
}

then call it (with a static import)

stream.collect(toList(size))

!inelegant?

edit (This does make it an ArrayList) is this bad?