3973       public static byte[] copyOfRange(byte[] original, int start, int end) {
 3974           if (start <= end) {
 3975               if (original.length >= start && 0 <= start) {
 3976                   int length = end - start;
 3977                   int copyLength = Math.min(length, original.length - start);
 3978                   byte[] copy = new byte[length];
 3979                   System.arraycopy(original, start, copy, 0, copyLength);
 3980                   return copy;
 3981               }
 3982               throw new ArrayIndexOutOfBoundsException();
 3983           }
 3984           throw new IllegalArgumentException();
 3985       }
 3986