Unicode-encoded, it occupies two bytes a QChar
implicit sharing techniques to save memory and reduce unnecessary copies of the data
across platforms, regardless of the platform compatibility string
QString direct mutual support between the strings and the numbers conversion
between the size of the direct support QString string comparison (in lexicographic order)
QString directly support the string conversion in different coding
QString directly support conversion between std :: string and wstring :: STD
QString directly supports regular expressions use
