title: Import existing Swing project to NetBeans
body: <p>I have been sent a Java file containing a GUI interface that I have to edit and add features. I have created a project on NetBeans and I am able to launch it. The problem is I can't edit the interface, and all the documentation I have found is about creating a new interface. So I would like to know if there is a way to edit the interface of the project with NetBeans. I am using NetBeans 7.2 on Linux.</p>