To problhma mou einai to ekshs: Ftiaxnw mia atzenta h opoia thelw na krataei rantebou dixnontas thn wra tou rantebou, kapoia info, kai ton afksonta arithmo tou rantebou. Thelw ola ta entries na sozontai se ena arxeio sto disko, kai opote trexw to programma na fortonei afto to arxeio me ta rantebou.
Xrisimopoiontas Sequential-Access file, to programma doulebei kanonika, alla den mporw na kanw edit th lista twn rantebou, diladi parolo pou blepw proigoumena rantebou, an paw na prosthesw ena kainourgio, tote to arxeio svinete kai periexei mono to neo rantebou.
Xrisimopoiontas Random Access file, mporw na prosthesw rantebou kanonika (toulaxiston den mou vgazei kapoio lathos), alla otan paw na kanw view ta rantebou, mono o ayksontas arithmos fenete kanonika, sta pedia pou tha eprepe kanonika na fenete h wra tou rantebou kai to info, vlepw tetragonakia.
Xrisimopoiw th jewl gia na kanw to GUI, kai to periballon mou einai Netbeans
an kapoios pistebei oti mporei na voithisei tote poly efxaristws tha postarw kai ton kwdika