diff -r fd16c54261b3 -r 90ce3da70b43 jdk/test/java/util/EnumSet/RetainAll.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/util/EnumSet/RetainAll.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6377356
+ * @summary Test EnumSet.retainAll
+ * @author Josh Bloch, Martin Buchholz
+ */
+
+import java.util.*;
+
+public class RetainAll {
+    enum RegularA { A0, A2 }
+    enum RegularB { B0, B1 }
+    enum JumboA {
+        A00, A01, A02, A03, A04, A05, A06, A07, A08, A09,
+        A10, A11, A12, A13, A14, A15, A16, A17, A18, A19,
+        A20, A21, A22, A23, A24, A25, A26, A27, A28, A29,
+        A30, A31, A32, A33, A34, A35, A36, A37, A38, A39,
+        A40, A41, A42, A43, A44, A45, A46, A47, A48, A49,
+        A50, A51, A52, A53, A54, A55, A56, A57, A58, A59,
+        A60, A61, A62, A63, A64, A65, A66, A67, A68, A69,
+    }
+    enum JumboB {
+        B00, B01, B02, B03, B04, B05, B06, B07, B08, B09,
+        B10, B11, B12, B13, B14, B15, B16, B17, B18, B19,
+        B20, B21, B22, B23, B24, B25, B26, B27, B28, B29,
+        B30, B31, B32, B33, B34, B35, B36, B37, B38, B39,
+        B40, B41, B42, B43, B44, B45, B46, B47, B48, B49,
+        B50, B51, B52, B53, B54, B55, B56, B57, B58, B59,
+        B60, B61, B62, B63, B64, B65, B66, B67, B68, B69,
+    }
+
+    private static void realMain(String[] args) throws Throwable {
+        Set<RegularA> ras = EnumSet.noneOf(RegularA.class);
+        Set<RegularB> rbs = EnumSet.noneOf(RegularB.class);
+        Set<JumboA>   jas = EnumSet.noneOf(JumboA.class);
+        Set<JumboB>   jbs = EnumSet.noneOf(JumboB.class);
+        check(ras.getClass().getName().matches(".*Regular.*"));
+        check(jas.getClass().getName().matches(".*Jumbo.*"));
+        check(! ras.retainAll(ras));
+        check(! ras.retainAll(rbs));
+        check(! jas.retainAll(jas));
+        check(! jas.retainAll(jbs));
+        check(! ras.retainAll(jas));
+        check(! jas.retainAll(ras));
+    }
+
+    //--------------------- Infrastructure ---------------------------
+    static volatile int passed = 0, failed = 0;
+    static void pass() {passed++;}
+    static void fail() {failed++; Thread.dumpStack();}
+    static void fail(String msg) {System.out.println(msg); fail();}
+    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
+    static void check(boolean cond) {if (cond) pass(); else fail();}
+    static void equal(Object x, Object y) {
+        if (x == null ? y == null : x.equals(y)) pass();
+        else fail(x + " not equal to " + y);}
+    public static void main(String[] args) throws Throwable {
+        try {realMain(args);} catch (Throwable t) {unexpected(t);}
+        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
+        if (failed > 0) throw new AssertionError("Some tests failed");}
+}