Question

Java has file related exception classes.

Do C++ or Qt have similar classes?

Answer 1

The standard library streams have two modes:

1. State checking – the programmer must call good(), eof(), fail() or bad() to detect problems.

2. Exception throwing – the programmer calls exceptions(...) to set an exception mask, see the link for an example.

The Qt library typically does not use exceptions, the QIODevice class (and hence QFile) will return a bool for the success or failure of a call. The error message can be obtained from QIODevice::errorString().