--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/util/Iterator.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 1997, 2013, 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;
+
+import java.util.function.Consumer;
+
+/**
+ * An iterator over a collection.  {@code Iterator} takes the place of
+ * {@link Enumeration} in the Java Collections Framework.  Iterators
+ * differ from enumerations in two ways:
+ *
+ * <ul>
+ *      <li> Iterators allow the caller to remove elements from the
+ *           underlying collection during the iteration with well-defined
+ *           semantics.
+ *      <li> Method names have been improved.
+ * </ul>
+ *
+ * <p>This interface is a member of the
+ * <a href="{@docRoot}/../technotes/guides/collections/index.html">
+ * Java Collections Framework</a>.
+ *
+ * @param <E> the type of elements returned by this iterator
+ *
+ * @author  Josh Bloch
+ * @see Collection
+ * @see ListIterator
+ * @see Iterable
+ * @since 1.2
+ */
+public interface Iterator<E> {
+    /**
+     * Returns {@code true} if the iteration has more elements.
+     * (In other words, returns {@code true} if {@link #next} would
+     * return an element rather than throwing an exception.)
+     *
+     * @return {@code true} if the iteration has more elements
+     */
+    boolean hasNext();
+
+    /**
+     * Returns the next element in the iteration.
+     *
+     * @return the next element in the iteration
+     * @throws NoSuchElementException if the iteration has no more elements
+     */
+    E next();
+
+    /**
+     * Removes from the underlying collection the last element returned
+     * by this iterator (optional operation).  This method can be called
+     * only once per call to {@link #next}.  The behavior of an iterator
+     * is unspecified if the underlying collection is modified while the
+     * iteration is in progress in any way other than by calling this
+     * method.
+     *
+     * @implSpec
+     * The default implementation throws an instance of
+     * {@link UnsupportedOperationException} and performs no other action.
+     *
+     * @throws UnsupportedOperationException if the {@code remove}
+     *         operation is not supported by this iterator
+     *
+     * @throws IllegalStateException if the {@code next} method has not
+     *         yet been called, or the {@code remove} method has already
+     *         been called after the last call to the {@code next}
+     *         method
+     */
+    default void remove() {
+        throw new UnsupportedOperationException("remove");
+    }
+
+    /**
+     * Performs the given action for each remaining element until all elements
+     * have been processed or the action throws an exception.  Actions are
+     * performed in the order of iteration, if that order is specified.
+     * Exceptions thrown by the action are relayed to the caller.
+     *
+     * @implSpec
+     * <p>The default implementation behaves as if:
+     * <pre>{@code
+     *     while (hasNext())
+     *         action.accept(next());
+     * }</pre>
+     *
+     * @param action The action to be performed for each element
+     * @throws NullPointerException if the specified action is null
+     * @since 1.8
+     */
+    default void forEachRemaining(Consumer<? super E> action) {
+        Objects.requireNonNull(action);
+        while (hasNext())
+            action.accept(next());
+    }
+}