--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/io/charStreams/CharGenerator.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 1997, 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.
+ */
+
+/**/
+
+import java.io.*;
+
+
+public class CharGenerator {
+
+    private IntGenerator r;
+    int min = 0, max = 0xffff;
+
+    public CharGenerator(IntGenerator r) {
+        this.r = r;
+    }
+
+    public CharGenerator(IntGenerator r, int min, int max) {
+        this.r = r;
+        this.min = min;
+        this.max = max;
+    }
+
+    public char next() {
+        char c;
+        do
+            c = (char) (r.next(max - min) + min);
+        while ((c == '\r') || (c == '\n')
+               || ((c >= 0xd800) && (c <= 0xdfff))
+               || (c == 0xfffe));
+        return c;
+    }
+}