--- /dev/null	2016-05-17 12:01:17.473251102 +0900
+++ new/test/java/text/Format/DateFormat/bug4099975.java	2016-05-23 13:57:47.891478681 +0900
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 1998, 2016, 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 4099975
+ */
+
+import java.text.*;
+import java.util.Date;
+public class bug4099975 {
+    public static void main (String args[]){
+        DateFormatSymbols symbols = new DateFormatSymbols();
+        SimpleDateFormat df = new SimpleDateFormat("E hh:mm", symbols);
+        System.out.println(df.toLocalizedPattern());
+        symbols.setLocalPatternChars("abcdefghijklmonpqr"); // change value of field
+        System.out.println(df.toLocalizedPattern());
+
+    }
+}