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

Update for Java8:

Using Java8 streams you can also do pretty trivally.

ArrayList deduped;
deduped = yourArrayList.stream()
             .distinct()
             .collect(Collectors.toCollection(ArrayList::new));

This also has the advantage over going ArrayList → Set → ArrayList of maintaining ordering.