How to edit the GUI java file? I download the Jigloo SWT/Swing GUI Builder. And then I edit the file using open with form editor. But it seems inconvenient to edit some files. Since I can't see the total layout when I open some swing file. And the i can't set the button in the way i want. For example, I want to edit ButtonDemo.java from sun java tutorial. But I can't see the exact layout in the editor as the running window. Why? Is there any other way to edit the swing/swt files?