I need your help/advices to find a correct Layout and to organize a JFrame.
Well I have a rather “complicated” JFrame and I don’t know which is the best Layout for it.
Am I obliged to use a GridBagLayout ?
If it is the case, can you give some tips in the organisation of the class ?
Each time I use a GridBagLayout the result is kinda random.

Right click to show and zoom picture ..
I had the same question the other day when I was working on a similar layout. I found this link to be very helpful with gridbag layout configurations.
GridBagLayout Help
You aren’t obliged to use a gridbag layout, there are many other layouts that could achieve the desired look and feel. The tutorial in the above link has a similar look and feel to the layout in your picture.