Question

I have written my own implementation of java.utils.List. Now I’d like to test it, but I cannot manage to fill my collection with objects since it shows <identifier> expected whenever I add anything :

public static void main(String[] args) {}

MyCollection col = new MyCollection(10);
int[] tab = {1,2,4,5,6};
col.add(tab);

And the whole code here :

http://paste.pocoo.org/show/291343/

---

EDIT

MyCollection<Integer> col = new MyCollection<Integer>(10);
Integer[] tab = {1,2,4,5,6};
col.add(tab);

still the same :/

Answer 1

You’re trying to add an int[] as item of a Collection<Integer> which accepts Integer (or autoboxed int) items only. This would only work if you have a Collection<int[]> (of which the added array would then be the sole item).

To convert an int[] to a Collection<Integer>, you need to loop over it:

int[] array = { 1, 2, 3, 4, 5 };
Collection<Integer> collection = new ArrayList<Integer>();
for (int item : array) {
    collection.add(item);
}

See also:

• Arrays tutorial
• Collections tutorial
• Generics tutorial