--- /dev/null	2013-08-08 10:35:41.336703335 -0700
+++ new/test/java/io/pathNames/win32/ReservedName.java	2013-08-08 11:45:48.216579035 -0700
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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.
+ */
+
+/* @test
+   @bug 4858457
+   @summary Check getCanonicalPath's treatment of reserved names on Windows
+   @author Dan Xu
+ */
+
+import java.io.File;
+import java.io.IOException;
+
+public class ReservedName {
+    private final static String[] RESERVED_NAMES = {"CON", "PRN", "AUX", "NUL",
+            "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8",
+            "COM9", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7",
+            "LPT8", "LPT9"};
+
+    private final static String EXT = ".TXT";
+
+    public static void main(String[] args) throws IOException {
+        if (!System.getProperty("os.name").startsWith("Windows")) {
+            return;
+        }
+
+        for (String name : RESERVED_NAMES) {
+            String nameWithExt = name + EXT;
+            test(name);
+            test(name.toLowerCase());
+            test(nameWithExt);
+            test(nameWithExt.toLowerCase());
+        }
+    }
+
+    private static void test(String name) throws IOException {
+        File f = new File(name);
+        System.out.println(name + " canonical path:" + f.getCanonicalPath());
+    }
+}