With this question it will be a long wait for sensible answers... Mistake # 1
- why you placed your question in the tags ERP, 1C, SQL, and CRM? You attract a number of specialists who only lose time. Or join in the outrage with ideological opponents... you Have a pure question from section JAVA. ERP and CRM - at least read what it is, and then realize how stupid is to put in a little store. SQL you not from this area, the problems, and in General you know that in JAVA we use the ORM approach. 1C is generally not the topic.Mistake # 2
- there is no certainty in the requirements. Instead of "Samapika 1C" you could write "Samapika on Deltah", "Samapika PHP", "Samapika on the Clipper"... nothing would change anything is not clear. You need to list the functional requirements for your future solution for your shop - work cash register, work with weights, work with a barcode scanner, access to stock balance, using discount cards and the calculations with VIP-clients... If I have a specific list of everything you will need, then maybe someone would be led in the right direction.
As I understand it - you have learned the basics of JAVA by books authors Herbert Shildt, Joshua Bloch and Bruce Akela and are now looking for a project to consolidate theory into practice. Listen, go to Github
. They are the two largest repositories of open-source code and platforms for their further development. There you will find a solution in JAVA for the retail trade - there is something will have been completed and some projects looking forward to your.. Success!