public class myIterator<E> implements Iterator<E> {
        E[] elemsOfMultiSet;
        int currentObj;
        int lastRemovedElement;
        myIterator() {
            elemsOfMultiSet = (E[])SimpleMultiSet.this.toArray();
            lastRemovedElement = -1;
            currentObj = -1;
        }
        @Override
        public E next() {
            if (this.hasNext()) {
                ++currentObj;
                return elemsOfMultiSet[currentObj];
            }
            else {
                throw new NoSuchElementException();
            }

        }

        @Override
        public boolean hasNext() {
            return currentObj < elemsOfMultiSet.length - 1;
        }

        @Override
        public void remove() {
            if (lastRemovedElement == currentObj){
                throw new IllegalStateException();
            }
            try {
                lastRemovedElement = currentObj;
                SimpleMultiSet.this.remove(elemsOfMultiSet[currentObj]);
            }
            catch (Exception e) {
                throw new IllegalStateException();
            }
        }
    }