1/*
2 *  Licensed to the Apache Software Foundation (ASF) under one or more
3 *  contributor license agreements.  See the NOTICE file distributed with
4 *  this work for additional information regarding copyright ownership.
5 *  The ASF licenses this file to You under the Apache License, Version 2.0
6 *  (the "License"); you may not use this file except in compliance with
7 *  the License.  You may obtain a copy of the License at
8 *
9 *     http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 */
17
18package java.util;
19
20/**
21 * A legacy iteration interface.
22 *
23 * <p>New code should use {@link Iterator} instead. {@code Iterator} replaces the
24 * enumeration interface and adds a way to remove elements from a collection.
25 *
26 * <p>If you <i>have</i> an {@code Enumeration} and want a {@code Collection}, you
27 * can use {@link Collections#list} to get a {@code List}.
28 *
29 * <p>If you <i>need</i> an {@code Enumeration} for a legacy API and have a
30 * {@code Collection}, you can use {@link Collections#enumeration}.
31 *
32 * @version 1.0
33 * @see Iterator
34 */
35public interface Enumeration<E> {
36
37    /**
38     * Returns whether this {@code Enumeration} has more elements.
39     *
40     * @return {@code true} if there are more elements, {@code false} otherwise.
41     * @see #nextElement
42     */
43    public boolean hasMoreElements();
44
45    /**
46     * Returns the next element in this {@code Enumeration}.
47     *
48     * @return the next element..
49     * @throws NoSuchElementException
50     *             if there are no more elements.
51     * @see #hasMoreElements
52     */
53    public E nextElement();
54}
55