Does QT have something like JAVA's ByteBuffer?

Question

Qt

Found QBuffer but it can only work with Char. Maybe there is some extended class?

Answer 1

Not only.
doc.qt.io/qt-5/qbytearray.html#setNum

QByteArray ba;
int n = 63;
ba.setNum(n);           // ba == "63"
QBuffer buffer(&ba);