--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/util/function/Consumer.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010, 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.function;
+
+import java.util.Objects;
+
+/**
+ * Represents an operation that accepts a single input argument and returns no
+ * result. Unlike most other functional interfaces, {@code Consumer} is expected
+ * to operate via side-effects.
+ *
+ * <p>This is a <a href="package-summary.html">functional interface</a>
+ * whose functional method is {@link #accept(Object)}.
+ *
+ * @param <T> the type of the input to the operation
+ *
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface Consumer<T> {
+
+    /**
+     * Performs this operation on the given argument.
+     *
+     * @param t the input argument
+     */
+    void accept(T t);
+
+    /**
+     * Returns a composed {@code Consumer} that performs, in sequence, this
+     * operation followed by the {@code after} operation. If performing either
+     * operation throws an exception, it is relayed to the caller of the
+     * composed operation.  If performing this operation throws an exception,
+     * the {@code after} operation will not be performed.
+     *
+     * @param after the operation to perform after this operation
+     * @return a composed {@code Consumer} that performs in sequence this
+     * operation followed by the {@code after} operation
+     * @throws NullPointerException if {@code after} is null
+     */
+    default Consumer<T> andThen(Consumer<? super T> after) {
+        Objects.requireNonNull(after);
+        return (T t) -> { accept(t); after.accept(t); };
+    }
+}