Why does Arrays.asList on an int[] return a List<int[]>, and not a List<int>?

Question

Consider this code:

int[] tcc = {1,2,3};
ArrayList<Integer> tc = Arrays.asList(tcc);

For the above, Java complains that it cannot convert from List<int[]> to ArrayList<Integer>.

What's wrong with this?

Why is it List<int[]> and not List<int>?

Answer 1

An ArrayList can hold only objects not primitives such as ints, and since int != Integer you can't do what you're trying to do with an array of primitives, simple as that. This will work for an array of Integer though.