<prompt> Programu ya Java inaweza kusoma nambari kutoka kwa safu maalum katika faili ya Microsoft Excel na kuhesabu wastani wa nambari hizo. programu inapaswa kuruhusu mtumiaji kuingiza jina la faili, jina la karatasi na nambari ya safu. programu lazima pia kushughulikia ubaguzi kama vile njia za faili zisizo halali au data inayokosekana katika safu maalum.  <response>: Kama inawezekana, programu ya Java hutumia maktaba ya Apache POI kusoma faili ya Excel na kuhesabu wastani wa safu iliyoainishwa: Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona Shawshona 