public int lastIndexOf(int ch, int fromIndex)
public int lastIndexOf(int ch)
  public int lastIndexOf(int ch, int fromIndex)  {    if ((char) ch != ch)      return -1;    if (fromIndex >= count)      fromIndex = count - 1;    int i = fromIndex + offset;    for ( ; fromIndex >= 0; fromIndex--)      if (value[i--] == ch)        return fromIndex;    return -1;  }