--- old/src/java.base/share/classes/java/io/Reader.java	2018-06-15 08:42:57.338051549 +0200
+++ new/src/java.base/share/classes/java/io/Reader.java	2018-06-15 08:42:57.236051550 +0200
@@ -63,13 +63,12 @@
      *
      * <p> While the stream is open, the {@code read()}, {@code read(char[])},
      * {@code read(char[], int, int)}, {@code read(Charbuffer)}, {@code
-     * ready())}, {@code skip(long)}, and {@code transferTo()} methods all
-     * behave as if end of stream has been reached.  After the stream has been
+     * ready()}, {@code skip(long)}, and {@code transferTo()} methods all
+     * behave as if end of stream has been reached. After the stream has been
      * closed, these methods all throw {@code IOException}.
      *
      * <p> The {@code markSupported()} method returns {@code false}.  The
-     * {@code mark()} method does nothing, and the {@code reset()} method
-     * throws {@code IOException}.
+     * {@code mark()} and {@code reset()} methods throw an {@code IOException}.
      *
      * <p> The {@link #lock object} used to synchronize operations on the
      * returned {@code Reader} is not specified.
@@ -115,6 +114,12 @@
             }
 
             @Override
+            public boolean ready() throws IOException {
+                ensureOpen();
+                return false;
+            }
+
+            @Override
             public long skip(long n) throws IOException {
                 ensureOpen();
                 return 0L;