--- /dev/null	2013-01-08 12:17:08.801456335 -0800
+++ new/src/share/classes/java/lang/FunctionalInterface.java	2013-01-08 13:21:45.000000000 -0800
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2012, 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.lang;
+
+import java.lang.annotation.*;
+
+/**
+ * Indicates that an interface type declaration is intended to be a
+ * <i>functional interface</i> as defined by the Java Language
+ * Specification.  Conceptually, a functional interface has exactly
+ * one abstract method.  Since {@linkplain
+ * java.lang.reflect.Method#isDefault() default methods} are not
+ * abstract, any default methods declared in an interface do not
+ * contribute to its abstract method count.  If an interface declares
+ * an abstract method overriding one of the public methods of
+ * java.lang.Object, that also does <em>not</em> count toward the
+ * abstract method count.
+ *
+ * Note that instances of functional interfaces can be created with
+ * lambda expressions, method references, or constructor references.
+ *
+ * If a type is annotated with this annotation type, compilers are
+ * required to generate an error message unless:
+ *
+ * <ul>
+ * <li> The type is an interface type and not an annotation type, enum, or class.
+ * <li> The annotated type satisfies the requirements of a functional interface.
+ * </ul>
+ *
+ * @jls 9.8 Functional Interfaces
+ * @jls 9.4.3 Interface Method Body
+ * @since 1.8
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface FunctionalInterface {}