Need help in this java code. I want to make this program with oop in java

Question

Hi guys, I'm doing a Super market billing system project in java. I did all things that I know but I'm very beginner that why I'm not able to implement my logic.

I want a person who can understand my code and what I want to do and make a little bit correction on it. To Run this code, I tried my best but I can't 😔
I know it have some errors and wrong implementation but I want to do that's way.

Can you please take look for a minute on my code please, and please make some changes on it. Please help me I try my best to do this mini project but at last it not working. I'm filling very sad please help.

Code
https://ideone.com/bRycEh

https://code.sololearn.com/cKybP1364fsH/?ref=app