I have found one thing today......

In netbeans Why there is GTA.form file ?

When we click new GUI java code then GTA.form and GTA.java files are created.
This GTA.form file is used to store what are the components and where they are placed.
There is option in netbeans to see CODE or DESIGN. When design is clicked GTA.form file is accessed and using it GUI is drawn and shown by NetBeans.

Yours,
D.Ravikumar MCA.,
--Your dreams have value.