Whenever I do:

Iterator KeyIterator = KeySet.iterator();
               while (KeyIterator.hasNext()){
                   Attack ReturnedAttack =  (Attack)
KeyIterator.next();

I get an error, either:
Exception in thread "main" java.lang.ClassCastException:
java.lang.String
       at geolocation.Main.main(Main.java:141)
The process tried to write to a nonexistent pipe.

or a no such object error, even though I can verify that there are
objects in the object being iterated on.

Any idea why?

Thanks!