aswad56

ok. ive been asked to do some research on this object based data model but the information that i got is not really helping. what is it actually? something about entity is it? kinda lost. pls help me.

Can anyone change this to polymorphism? it is a simple program. no calculation at all. but the problem is, everytime i'll try to use polymorphim or extanding the classes, error occurs. actually i wish this program is in polymorphism structure, but im not really good in it(polymorphism). [code] import java.io.*; …