Develop a desktop Java application

I need an application (a tool), non internet, standalone, cross platform (Mac OSX and Windows). I prefer java. The major task of this application will be to use data from a “dbase” or excel tables or text files to create multiple specific name sets which I call MagSets. All data will be in Greek Language UTF-8. Each MagSet needs to be structured based on some parameters which will exist in a parameters file (I call this file Magset_ini). The best scenario for creating the definition file of each MagSet (Magset_ini) would be by this application but since this process (initial template creation) will happen once and will not be repeated often, I understand that it might add complexity to development. So the initial Magset_ini files will be created and maintened manually (csv or txt file) containing all the necessary parameters for each magset. Best scenario described above, can be my next project after we finish this one. The objective of the application should be to create lists (Magsets_data) with random-ish selected names from the dbase or tables I have, taking under consideration all the Magset_ini parameters and previous history. The output will actually be a table-xls or text csv. Each previously created magset will remain available to the app to consider it as history (for compare and follow names repeatability rules). Multiple different Magset_ini will be created and each one will have its own rules and history. Further details can be discussed. Thank you