src/java.base/share/classes/java/lang/StringUTF16.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, 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.  Oracle designates this

@@ -271,10 +271,24 @@
 
     @HotSpotIntrinsicCandidate
     public static int compareTo(byte[] value, byte[] other) {
         int len1 = length(value);
         int len2 = length(other);
+        return compareValues(value, other, len1, len2);
+    }
+
+    /*
+     * Checks the boundary and then compares the byte arrays.
+     */
+    public static int compareTo(byte[] value, byte[] other, int len1, int len2) {
+        checkOffset(len1, value);
+        checkOffset(len2, other);
+
+        return compareValues(value, other, len1, len2);
+    }
+
+    private static int compareValues(byte[] value, byte[] other, int len1, int len2) {
         int lim = Math.min(len1, len2);
         for (int k = 0; k < lim; k++) {
             char c1 = getChar(value, k);
             char c2 = getChar(other, k);
             if (c1 != c2) {

@@ -287,10 +301,14 @@
     @HotSpotIntrinsicCandidate
     public static int compareToLatin1(byte[] value, byte[] other) {
         return -StringLatin1.compareToUTF16(other, value);
     }
 
+    public static int compareToLatin1(byte[] value, byte[] other, int len1, int len2) {
+        return -StringLatin1.compareToUTF16(other, value, len2, len1);
+    }
+
     public static int compareToCI(byte[] value, byte[] other) {
         int len1 = length(value);
         int len2 = length(other);
         int lim = Math.min(len1, len2);
         for (int k = 0; k < lim; k++) {