Method keys

vm/JavaAPI/src/java/util/Hashtable.java:539–550

Returns an enumeration on the keys of this Hashtable instance. The results of the enumeration may be affected if the contents of this Hashtable are modified. @return an enumeration of the keys of this Hashtable. @see #elements @see #size @see Enumeration

()

     * @see Enumeration
     */
    @Override
    @SuppressWarnings("unchecked")
    public synchronized java.util.Enumeration<K> keys() {
        if (elementCount == 0) {
            return (java.util.Enumeration<K>) EMPTY_ENUMERATION;
        }
        return new HashEnumIterator<K>(new MapEntry.Type<K, K, V>() {
            public K get(MapEntry<K, V> entry) {
                return entry.key;
            }
        }, true);
    }

    /**
     * Returns a set of the keys contained in this {@code Hashtable}. The set