Its been at least a year since I've posted and I'm about to write a program for my own use. Its sort of like a file viewer which is why I'm basing it on windows explorer. I'd like to use MVC since when I lost my job that was the pattern used on the project and it still seems prevalent today. I know Swing can be used for the View but I'm not sure what the Model and the Controller would be written in. I do understand I will need to get a firmer grasp of MVC but this is just prep work for down the road. Since there will be a lot of file interation would NIO be in the Model or the Controller? I was thinking the model.