converting int array to List

[Lucas Smith]

How can I do that?

   
int[] ii = {1,2,3};
List l = Arrays.asList(ii); //after that List contains one element of type Object, which can be cast to int[]
 

Of course that doesn't work properly, because: asList(T... a), and int is not T.

[Ankit Garg]

List cannot contains primitive elements. I think the only option is to iterate over the array and add elements to the list...

[Sebastian Janisch]

This will work...

Integer[] ints = new Integer[] {1,2,3};
List<Integer> list = Arrays.asList(ints);

[Lucas Smith]

OK, I knew that. So there is no way to convert int[] to list of Integers in one step.

By the way I have another question about generics.
How does compiler know that:

   
Integer[] ii = {1,2,3};
List<Integer> list= Arrays.asList(ii);
 

is:

   
Integer[] ii = {1,2,3};
List<Integer> list= Arrays.<Integer>asList(ii);

[Sebastian Janisch]

Check the implementation of the Arrays.asList class. Pretty straight forward.

 public static <T> List<T> asList(T... a) {
	return new ArrayList<T>(a);
    }