These infamous lines are certain to get copied quite a bit more. In case you haven't seen them:

  private static void rangeCheck(int arrayLen, int fromIndex, int toIndex) {
      if (fromIndex > toIndex)
          throw new IllegalArgumentException("fromIndex(" + fromIndex +
                     ") > toIndex(" + toIndex+")");
      if (fromIndex < 0)
          throw new ArrayIndexOutOfBoundsException(fromIndex);
      if (toIndex > arrayLen)
          throw new ArrayIndexOutOfBoundsException(toIndex);
  }