Actually, you have already written code to open a file. ......
Open FileDialog Box
Actually, you have already written code to open a file. The process is no different for the open file dialogue box. And because you have already written the classes that open and write to a file, you can just import them into the current project.To import a class that you have already written, have a look at the Properties window on the left of NetBeans. (If you can't see the properties window, click the Window menu item at the top of NetBeans. From the Window menu, select Properties.)
Expand the entry for your current project, and right-click the Libraries item:
