diff -r 000000000000 -r 9cf04876e4a5 emul/compact/src/main/java/java/util/JumboEnumSet.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emul/compact/src/main/java/java/util/JumboEnumSet.java	Sun Sep 22 21:49:42 2013 +0200
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2003, 2011, 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;
+
+/**
+ * Private implementation class for EnumSet, for "jumbo" enum types
+ * (i.e., those with more than 64 elements).
+ *
+ * @author Josh Bloch
+ * @since 1.5
+ * @serial exclude
+ */
+class JumboEnumSet<E extends Enum<E>> extends EnumSet<E> {
+    private static final long serialVersionUID = 334349849919042784L;
+
+    /**
+     * Bit vector representation of this set.  The ith bit of the jth
+     * element of this array represents the  presence of universe[64*j +i]
+     * in this set.
+     */
+    private long elements[];
+
+    // Redundant - maintained for performance
+    private int size = 0;
+
+    JumboEnumSet(Class<E>elementType, Enum[] universe) {
+        super(elementType, universe);
+        elements = new long[(universe.length + 63) >>> 6];
+    }
+
+    void addRange(E from, E to) {
+        int fromIndex = from.ordinal() >>> 6;
+        int toIndex = to.ordinal() >>> 6;
+
+        if (fromIndex == toIndex) {
+            elements[fromIndex] = (-1L >>>  (from.ordinal() - to.ordinal() - 1))
+                            << from.ordinal();
+        } else {
+            elements[fromIndex] = (-1L << from.ordinal());
+            for (int i = fromIndex + 1; i < toIndex; i++)
+                elements[i] = -1;
+            elements[toIndex] = -1L >>> (63 - to.ordinal());
+        }
+        size = to.ordinal() - from.ordinal() + 1;
+    }
+
+    void addAll() {
+        for (int i = 0; i < elements.length; i++)
+            elements[i] = -1;
+        elements[elements.length - 1] >>>= -universe.length;
+        size = universe.length;
+    }
+
+    void complement() {
+        for (int i = 0; i < elements.length; i++)
+            elements[i] = ~elements[i];
+        elements[elements.length - 1] &= (-1L >>> -universe.length);
+        size = universe.length - size;
+    }
+
+    /**
+     * Returns an iterator over the elements contained in this set.  The
+     * iterator traverses the elements in their <i>natural order</i> (which is
+     * the order in which the enum constants are declared). The returned
+     * Iterator is a "weakly consistent" iterator that will never throw {@link
+     * ConcurrentModificationException}.
+     *
+     * @return an iterator over the elements contained in this set
+     */
+    public Iterator<E> iterator() {
+        return new EnumSetIterator<>();
+    }
+
+    private class EnumSetIterator<E extends Enum<E>> implements Iterator<E> {
+        /**
+         * A bit vector representing the elements in the current "word"
+         * of the set not yet returned by this iterator.
+         */
+        long unseen;
+
+        /**
+         * The index corresponding to unseen in the elements array.
+         */
+        int unseenIndex = 0;
+
+        /**
+         * The bit representing the last element returned by this iterator
+         * but not removed, or zero if no such element exists.
+         */
+        long lastReturned = 0;
+
+        /**
+         * The index corresponding to lastReturned in the elements array.
+         */
+        int lastReturnedIndex = 0;
+
+        EnumSetIterator() {
+            unseen = elements[0];
+        }
+
+        public boolean hasNext() {
+            while (unseen == 0 && unseenIndex < elements.length - 1)
+                unseen = elements[++unseenIndex];
+            return unseen != 0;
+        }
+
+        public E next() {
+            if (!hasNext())
+                throw new NoSuchElementException();
+            lastReturned = unseen & -unseen;
+            lastReturnedIndex = unseenIndex;
+            unseen -= lastReturned;
+            return (E) universe[(lastReturnedIndex << 6)
+                                + Long.numberOfTrailingZeros(lastReturned)];
+        }
+
+        public void remove() {
+            if (lastReturned == 0)
+                throw new IllegalStateException();
+            final long oldElements = elements[lastReturnedIndex];
+            elements[lastReturnedIndex] &= ~lastReturned;
+            if (oldElements != elements[lastReturnedIndex]) {
+                size--;
+            }
+            lastReturned = 0;
+        }
+    }
+
+    /**
+     * Returns the number of elements in this set.
+     *
+     * @return the number of elements in this set
+     */
+    public int size() {
+        return size;
+    }
+
+    /**
+     * Returns <tt>true</tt> if this set contains no elements.
+     *
+     * @return <tt>true</tt> if this set contains no elements
+     */
+    public boolean isEmpty() {
+        return size == 0;
+    }
+
+    /**
+     * Returns <tt>true</tt> if this set contains the specified element.
+     *
+     * @param e element to be checked for containment in this collection
+     * @return <tt>true</tt> if this set contains the specified element
+     */
+    public boolean contains(Object e) {
+        if (e == null)
+            return false;
+        Class eClass = e.getClass();
+        if (eClass != elementType && eClass.getSuperclass() != elementType)
+            return false;
+
+        int eOrdinal = ((Enum)e).ordinal();
+        return (elements[eOrdinal >>> 6] & (1L << eOrdinal)) != 0;
+    }
+
+    // Modification Operations
+
+    /**
+     * Adds the specified element to this set if it is not already present.
+     *
+     * @param e element to be added to this set
+     * @return <tt>true</tt> if the set changed as a result of the call
+     *
+     * @throws NullPointerException if <tt>e</tt> is null
+     */
+    public boolean add(E e) {
+        typeCheck(e);
+
+        int eOrdinal = e.ordinal();
+        int eWordNum = eOrdinal >>> 6;
+
+        long oldElements = elements[eWordNum];
+        elements[eWordNum] |= (1L << eOrdinal);
+        boolean result = (elements[eWordNum] != oldElements);
+        if (result)
+            size++;
+        return result;
+    }
+
+    /**
+     * Removes the specified element from this set if it is present.
+     *
+     * @param e element to be removed from this set, if present
+     * @return <tt>true</tt> if the set contained the specified element
+     */
+    public boolean remove(Object e) {
+        if (e == null)
+            return false;
+        Class eClass = e.getClass();
+        if (eClass != elementType && eClass.getSuperclass() != elementType)
+            return false;
+        int eOrdinal = ((Enum)e).ordinal();
+        int eWordNum = eOrdinal >>> 6;
+
+        long oldElements = elements[eWordNum];
+        elements[eWordNum] &= ~(1L << eOrdinal);
+        boolean result = (elements[eWordNum] != oldElements);
+        if (result)
+            size--;
+        return result;
+    }
+
+    // Bulk Operations
+
+    /**
+     * Returns <tt>true</tt> if this set contains all of the elements
+     * in the specified collection.
+     *
+     * @param c collection to be checked for containment in this set
+     * @return <tt>true</tt> if this set contains all of the elements
+     *        in the specified collection
+     * @throws NullPointerException if the specified collection is null
+     */
+    public boolean containsAll(Collection<?> c) {
+        if (!(c instanceof JumboEnumSet))
+            return super.containsAll(c);
+
+        JumboEnumSet es = (JumboEnumSet)c;
+        if (es.elementType != elementType)
+            return es.isEmpty();
+
+        for (int i = 0; i < elements.length; i++)
+            if ((es.elements[i] & ~elements[i]) != 0)
+                return false;
+        return true;
+    }
+
+    /**
+     * Adds all of the elements in the specified collection to this set.
+     *
+     * @param c collection whose elements are to be added to this set
+     * @return <tt>true</tt> if this set changed as a result of the call
+     * @throws NullPointerException if the specified collection or any of
+     *     its elements are null
+     */
+    public boolean addAll(Collection<? extends E> c) {
+        if (!(c instanceof JumboEnumSet))
+            return super.addAll(c);
+
+        JumboEnumSet es = (JumboEnumSet)c;
+        if (es.elementType != elementType) {
+            if (es.isEmpty())
+                return false;
+            else
+                throw new ClassCastException(
+                    es.elementType + " != " + elementType);
+        }
+
+        for (int i = 0; i < elements.length; i++)
+            elements[i] |= es.elements[i];
+        return recalculateSize();
+    }
+
+    /**
+     * Removes from this set all of its elements that are contained in
+     * the specified collection.
+     *
+     * @param c elements to be removed from this set
+     * @return <tt>true</tt> if this set changed as a result of the call
+     * @throws NullPointerException if the specified collection is null
+     */
+    public boolean removeAll(Collection<?> c) {
+        if (!(c instanceof JumboEnumSet))
+            return super.removeAll(c);
+
+        JumboEnumSet es = (JumboEnumSet)c;
+        if (es.elementType != elementType)
+            return false;
+
+        for (int i = 0; i < elements.length; i++)
+            elements[i] &= ~es.elements[i];
+        return recalculateSize();
+    }
+
+    /**
+     * Retains only the elements in this set that are contained in the
+     * specified collection.
+     *
+     * @param c elements to be retained in this set
+     * @return <tt>true</tt> if this set changed as a result of the call
+     * @throws NullPointerException if the specified collection is null
+     */
+    public boolean retainAll(Collection<?> c) {
+        if (!(c instanceof JumboEnumSet))
+            return super.retainAll(c);
+
+        JumboEnumSet<?> es = (JumboEnumSet<?>)c;
+        if (es.elementType != elementType) {
+            boolean changed = (size != 0);
+            clear();
+            return changed;
+        }
+
+        for (int i = 0; i < elements.length; i++)
+            elements[i] &= es.elements[i];
+        return recalculateSize();
+    }
+
+    /**
+     * Removes all of the elements from this set.
+     */
+    public void clear() {
+        Arrays.fill(elements, 0);
+        size = 0;
+    }
+
+    /**
+     * Compares the specified object with this set for equality.  Returns
+     * <tt>true</tt> if the given object is also a set, the two sets have
+     * the same size, and every member of the given set is contained in
+     * this set.
+     *
+     * @param e object to be compared for equality with this set
+     * @return <tt>true</tt> if the specified object is equal to this set
+     */
+    public boolean equals(Object o) {
+        if (!(o instanceof JumboEnumSet))
+            return super.equals(o);
+
+        JumboEnumSet es = (JumboEnumSet)o;
+        if (es.elementType != elementType)
+            return size == 0 && es.size == 0;
+
+        return Arrays.equals(es.elements, elements);
+    }
+
+    /**
+     * Recalculates the size of the set.  Returns true if it's changed.
+     */
+    private boolean recalculateSize() {
+        int oldSize = size;
+        size = 0;
+        for (long elt : elements)
+            size += Long.bitCount(elt);
+
+        return size != oldSize;
+    }
+
+    public EnumSet<E> clone() {
+        JumboEnumSet<E> result = (JumboEnumSet<E>) super.clone();
+        result.elements = result.elements.clone();
+        return result;
+    }
+}