IntIterator keyIterator() {
        return new IntIterator() {

            final IntIterator setitr = set.keyIterator();

            public boolean hasNext() {
                return setitr.hasNext();
            }

            public int next() {
                return setitr.next();
            }

        };
    }
IntIterator keyIterator ( ) { return new IntIterator ( ) { final IntIterator setitr = set . keyIterator ( ) ; public boolean hasNext ( ) { return setitr . hasNext ( ) ; } public int next ( ) { return setitr . next ( ) ; } } ; }
Returns an iterator over the keys of this map. The keys are returned in
no particular order.

@return an iterator over the keys of this map.