How can I clone an ArrayList
and also clone its items in Java?
For example I have:
ArrayList<Dog> dogs = getDogs(); ArrayList<Dog> clonedList = ....something to do with dogs....
And I would expect that objects in clonedList
are not the same as in dogs list.
Advertisement
Answer
You will need to iterate on the items, and clone them one by one, putting the clones in your result array as you go.
public static List<Dog> cloneList(List<Dog> list) { List<Dog> clone = new ArrayList<Dog>(list.size()); for (Dog item : list) clone.add(item.clone()); return clone; }
For that to work, obviously, you will have to get your Dog
class to implement the Cloneable
interface and override the clone()
method.