--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/lang/Readable.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2003, 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.lang;
+
+import java.io.IOException;
+
+/**
+ * A {@code Readable} is a source of characters. Characters from
+ * a {@code Readable} are made available to callers of the read
+ * method via a {@link java.nio.CharBuffer CharBuffer}.
+ *
+ * @since 1.5
+ */
+public interface Readable {
+
+    /**
+     * Attempts to read characters into the specified character buffer.
+     * The buffer is used as a repository of characters as-is: the only
+     * changes made are the results of a put operation. No flipping or
+     * rewinding of the buffer is performed.
+     *
+     * @param cb the buffer to read characters into
+     * @return The number of {@code char} values added to the buffer,
+     *                 or -1 if this source of characters is at its end
+     * @throws IOException if an I/O error occurs
+     * @throws NullPointerException if cb is null
+     * @throws java.nio.ReadOnlyBufferException if cb is a read only buffer
+     */
+    public int read(java.nio.CharBuffer cb) throws IOException;
+}