This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Again, what do you mean by "not working"? Do you mean that your computer blue-screens? That clicking the Run button (or menu item) does absolutely nothing at all? Or that Eclipse crashes? Or do you mean that the app runs but you get an exception? Or do you mean that the app runs but you don't get the results you though you would get? Or is it something else? Please tell us the exact behavior you are seeing when you attempt to run the app.
If you are getting an exception, post the exception stack trace.
If the app is not behaving as you expect, tell us exactly what the app is doing, and what it should be doing instead. In other words, tell us what you want the app to do (be very specific), and then tell use what the app is doing 9once again, be very specific)