Build a Java app for using and calculating from a database

An app that can generate G code for CNC cutting vinyl fence using pre-determined fence types in a CSV database. Must be able to run on Windows, but would also be good to run on Mac and Linux . Later adaptation to mobile devices may become important. Running the app on a website would be the plan for future. Must incorporate rich GUI with minimum entry of values. ListBox, comboBox, Radio and checkBox buttons will graphically show the fence profile (2D) and the holes to be cut. I can generate some GUI ideas and program layout later if necessary. Here is a link to a manufacturer who would use the app. [login to view URL] Here is a commercial product from my vendor for CNC controller: [login to view URL] It is much too simple and not pretty at all, but can give an idea. Demo download available. It also generates 50 or lines of G code.