Remove duplicates from Collection

[Charu Ak]

Hi All,
I get a result set from database in the form of Collection which contains few objects of a particular class type. This class implements serializable and comparable implementing compareTo() and overriding equals and hashcode.

The task is to remove duplicate objects (by duplicate i mean with same values) from collection.

One possible approach i can think here is to convert this collection into a Set. But I am not sure how Set removes duplicates and I cannot really check my code as it runs on hub and can b deployed only after build.

Any help/direction is appreciated.

Thanks

[Sebastian Janisch]

Converting your Collection into a set is the easiest approach.

The Set implementation follows the hashCode & equals contract to determine meaningfully equivalent objects.

So if hashCode and equals are properly overridden, a set does fine.