How do I remove repeated elements from ArrayList?

Question

I have an ArrayList, and I want to remove repeated strings from it. How can I do this?

Answer 1

If you don't want duplicates, use a Set instead of a List. To convert a List to a Set you can use the following code:

// list is some List of Strings
Set s = new HashSet(list);

If really necessary you can use the same construction to convert a Set back into a List.