c = new ClassroomManager(waitingMessagesToBeWritten);
ClassroomsListMediator m = new ClassroomsListMediator(readMediator.getClassroomsChooserQueue(),writeMediator.getClassroomsChooserQueue());
chat = new VirtuClassClientChat(waitingMessagesToBeRead,waitingMessagesToBeWritten);
chat.start();
ClassroomChooserFrame2 frame = new ClassroomChooserFrame2(m);
m.setListChanger(frame.l);
m.start();
frame.setVisible(true);
}