Using Arrays.asList with int array

Question

Using java.util.Arrays.asList, why its shows different list size for int (Primitive type) and String array?

a) With int

Answer 1

List is a generic type, primitive types are not valid substitutes for the type parameter.

So in your first example when you call Arrays.asList() with an int[], the value for the type parameter will be int[] and not int, and it will return a list of int arrays. It will have only 1 element, the array itself.

The second case will be a List, properly holding the 4 strings which you pass to it.