--- old/src/share/classes/java/nio/channels/SelectionKey.java	2012-11-23 16:00:29.188641539 +0800
+++ new/src/share/classes/java/nio/channels/SelectionKey.java	2012-11-23 16:00:29.048641535 +0800
@@ -250,6 +250,14 @@
      * connection sequence, or has an error pending, then it will add
      * <tt>OP_CONNECT</tt> to the key's ready set and add the key to its
      * selected-key&nbsp;set.  </p>
+     *
+     * <p>
+     * Note an application should not use Selector's select() method to check
+     * <tt>OP_CONNECT</tt> again, once a channel is already connected. Please
+     * see {@link  java.nio.channels.Selector#select() Selector.select()} for
+     * more detail.
+     * </p>
+     *
      */
     public static final int OP_CONNECT = 1 << 3;