HashSet.remove() and Iterator.remove() not working

Question

I\'m having problems with Iterator.remove() called on a HashSet.

I\'ve a Set of time stamped objects. Before adding a new item to the Set, I loop through the set, i

Answer 1

Thanks for all the help. I suspect the problem must be with equals() and hashCode() as suggested by spencerk. I did check those in my debugger and with unit tests, but I've got to be missing something.

I ended up doing a workaround-- copying all the items except one to a new Set. For kicks, I used Apache Commons CollectionUtils.

    Set tempResults = new HashSet();
    CollectionUtils.select(allResults, 
            new Predicate()
            {
                public boolean evaluate(Object oldData)
                {
                    return !data.equalsData((DataResult) oldData);
                }
            }
            , tempResults);
    allResults = tempResults;

I'm going to stop here-- too much work to simplify down to a simple test case. But the help is miuch appreciated.