Class EmptySet

lib/java/util/Collections.java:92–127

    }

    @SuppressWarnings("unchecked")
    private static final class EmptySet extends AbstractSet implements
            Serializable {
        private static final long serialVersionUID = 1582296315990362920L;

        @Override
        public boolean contains(Object object) {
            return false;
        }

        @Override
        public int size() {
            return 0;
        }

        @Override
        public Iterator iterator() {
            return new Iterator() {
                public boolean hasNext() {
                    return false;
                }

                public Object next() {
                    throw new NoSuchElementException();
                }

                public void remove() {
                    throw new UnsupportedOperationException();
                }
            };
        }

        private Object readResolve() {
            return Collections.EMPTY_SET;
        }
    }

    @SuppressWarnings("unchecked")
    private static final class EmptyMap extends AbstractMap implements