Add java.util.Enumeration

Author: peterschrammel

src/main/java/java/util/Enumeration.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 1994, 2005, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.util;
+
+/**
+ * An object that implements the Enumeration interface generates a
+ * series of elements, one at a time. Successive calls to the
+ * <code>nextElement</code> method return successive elements of the
+ * series.
+ * <p>
+ * For example, to print all elements of a <tt>Vector&lt;E&gt;</tt> <i>v</i>:
+ * <pre>
+ *   for (Enumeration&lt;E&gt; e = v.elements(); e.hasMoreElements();)
+ *       System.out.println(e.nextElement());</pre>
+ * <p>
+ * Methods are provided to enumerate through the elements of a
+ * vector, the keys of a hashtable, and the values in a hashtable.
+ * Enumerations are also used to specify the input streams to a
+ * <code>SequenceInputStream</code>.
+ * <p>
+ * NOTE: The functionality of this interface is duplicated by the Iterator
+ * interface.  In addition, Iterator adds an optional remove operation, and
+ * has shorter method names.  New implementations should consider using
+ * Iterator in preference to Enumeration.
+ *
+ * @see     java.util.Iterator
+ * @see     java.io.SequenceInputStream
+ * @see     java.util.Enumeration#nextElement()
+ * @see     java.util.Hashtable
+ * @see     java.util.Hashtable#elements()
+ * @see     java.util.Hashtable#keys()
+ * @see     java.util.Vector
+ * @see     java.util.Vector#elements()
+ *
+ * @author  Lee Boynton
+ * @since   JDK1.0
+ */
+public interface Enumeration<E> {
+    /**
+     * Tests if this enumeration contains more elements.
+     *
+     * @return  <code>true</code> if and only if this enumeration object
+     *           contains at least one more element to provide;
+     *          <code>false</code> otherwise.
+     */
+    boolean hasMoreElements();
+
+    /**
+     * Returns the next element of this enumeration if this enumeration
+     * object has at least one more element to provide.
+     *
+     * @return     the next element of this enumeration.
+     * @exception  NoSuchElementException  if no more elements exist.
+     */
+    E nextElement();
+}