--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/io/FilenameFilter.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 1994, 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.io;
+
+/**
+ * Instances of classes that implement this interface are used to
+ * filter filenames. These instances are used to filter directory
+ * listings in the <code>list</code> method of class
+ * <code>File</code>, and by the Abstract Window Toolkit's file
+ * dialog component.
+ *
+ * @author  Arthur van Hoff
+ * @author  Jonathan Payne
+ * @see     java.awt.FileDialog#setFilenameFilter(java.io.FilenameFilter)
+ * @see     java.io.File
+ * @see     java.io.File#list(java.io.FilenameFilter)
+ * @since   1.0
+ */
+@FunctionalInterface
+public interface FilenameFilter {
+    /**
+     * Tests if a specified file should be included in a file list.
+     *
+     * @param   dir    the directory in which the file was found.
+     * @param   name   the name of the file.
+     * @return  <code>true</code> if and only if the name should be
+     * included in the file list; <code>false</code> otherwise.
+     */
+    boolean accept(File dir, String name);
+}