--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/text/testlib/HexDumpReader.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 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.
+ */
+
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * HexDumpReader provides utility methods to read a hex dump text file
+ * and convert to an InputStream.  The format supported by the methods
+ * can be generated by the following command.
+ *
+ * $ od -vw -t x1 foo | sed -r -e 's/^[0-9]+ ?//' -e 's/ //g' -e '/^$/d'
+ */
+public class HexDumpReader {
+    public static InputStream getStreamFromHexDump(String fileName) {
+        return getStreamFromHexDump(new File(System.getProperty("test.src", "."),
+                                             fileName));
+    }
+
+    public static InputStream getStreamFromHexDump(File hexFile) {
+        ByteArrayBuilder bab = new ByteArrayBuilder();
+        int lineNo = 0;
+        try (BufferedReader reader
+                 = new BufferedReader(new InputStreamReader(new FileInputStream(hexFile),
+                                                            "us-ascii"))) {
+            String line;
+            while ((line = reader.readLine()) != null) {
+                lineNo++;
+                line = line.trim();
+                // Skip blank and comment lines.
+                if (line.length() == 0) {
+                    continue;
+                }
+                int x = line.indexOf('#');
+                if (x == 0) {
+                    continue;
+                }
+                if (x > 0) {
+                    line = line.substring(0, x).trim();
+                }
+                int len = line.length();
+                for (int i = 0; i < len; i += 2) {
+                    bab.put((byte)Integer.parseInt(line, i, i + 2, 16));
+                }
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(hexFile.getName() + ":error:" + lineNo + ": " + e, e);
+        }
+        return new ByteArrayInputStream(bab.toArray());
+    }
+
+
+    private static class ByteArrayBuilder {
+        private static final int BUFFER_SIZE = 4096;
+
+        private int size;
+        private List<byte[]> bytes;
+        private byte[] current;
+        private int offset;
+
+        ByteArrayBuilder() {
+            bytes = new ArrayList<>();
+            current = new byte[BUFFER_SIZE];
+        }
+
+        void put(byte b) {
+            if (offset == BUFFER_SIZE) {
+                bytes.add(current);
+                current = new byte[BUFFER_SIZE];
+                offset = 0;
+            }
+            current[offset++] = b;
+            size++;
+        }
+
+        byte[] toArray() {
+            byte[] buf = new byte[size];
+            int ptr = 0;
+            for (byte[] ba : bytes) {
+                System.arraycopy(ba, 0, buf, ptr, ba.length);
+                ptr += ba.length;
+            }
+            System.arraycopy(current, 0, buf, ptr, offset);
+            assert ptr + offset == size;
+            return buf;
+        }
+    }
+
+}