QFileInfo fileInfo; fileInfo.setFile("/home/user/Documents/example.txt");
QString filePath = "/home/user/Pictures/"; QFileInfo fileInfo; fileInfo.setFile(filePath + "picture.jpg");In this example, a QFileInfo object is created and its file path is set using a QString variable "filePath". The file path is set to "/home/user/Pictures/picture.jpg" using setFile(). The package library used for QFileInfo and other Qt classes in C++ is "Qt Core".