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 18 package 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 */ 35 public 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 */ hasMoreElements()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 */ nextElement()53 public E nextElement(); 54 } 55