--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/channels/Selector/CloseInvalidatesKeys.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/* @test
+ * @bug 4783178
+ * @summary Ensure that closing a selector invalidates its keys
+ */
+
+import java.nio.channels.*;
+
+
+public class CloseInvalidatesKeys {
+
+    public static void main (String [] args) throws Exception {
+        DatagramChannel ch = DatagramChannel.open();
+        ch.configureBlocking(false);
+        Selector sel = Selector.open();
+        SelectionKey key = ch.register(sel, SelectionKey.OP_WRITE);
+        sel.close();
+        if (key.isValid())
+            throw new Exception("Key valid after selector closed");
+    }
+
+}