Java POS System

Hi I am after some one who can write a Java Program which can be run on a network or from a Mapped drive to create sales invoices. I need to put the program on the Server where the database will stay and have a exe on a mapped drive on a machine on the same network The client pc should be able to open the exe and bring up a screen where he should be asked to log in and when password correct he should be able to select the pre set item and print out the invoice. its a basic pos system and and the end of the day the sales person should just do a end of say and things should role over and ready for sales next day. when roll over happens the system should email daily sales to a email address.. more details will be provided to the right person.