moeee,

You can run it from within netbeans.

If you only have 1 project (which you should) click the green arrow in the toolbar. Alternatively in the menu click Run -> Run Main Project . Or you could press Ctrl + F5. Or you could right click on the project in the Projects tab (left side of screen hopefully) and click Run.

That will run the program. There should be a Output screen with the results. If you can't see it go To "Windows" in the menu and click Output. Or you could press Ctrl + 4.

Hope that helps.