Remove duplicates from ArrayLists

Question

I have an ArrayList of custom objects. I want to remove duplicate entries.

The objects have three fields: title, subtitle, and id. If a su

Answer 1

Removes any duplicates in a collection, while preserving the order if it is an ordered collection. Efficient enough for most cases.

public static > T removeDuplicates(T collection)
{
    Set setItems = new LinkedHashSet(collection);
    collection.clear();
    collection.addAll(setItems);

    return collection;
}