To make things work you need to use Integer[] instead of int[].
Argument of asList is of type T... and generic types T can't represent primitive types int, so it will represent most specific Object class, which in this case is array type int[].
That is why Arrays.asList(arrs); will try to return List instead of List or even List.
Some people expect automatic conversion from int[] to Integer[], but lets nor forget that autoboxing works only for primitive types, but arrays are not primitive types.
