how to make this with layouts

[princezhm]

i posted this on Java EE forum, but i didnt get an answer maybe that is not the right forum to post it.


hello, i'm working on a project in netbeas with java, i want to do something, but first i'll show you some pictures and i'll explain what i want.

IMG1


IMG2


IMG3



i'm working in a MDI interface, so i have (in this example just one, but i'll add more after i solve this) this button centred in my window (IMG1) when i press this button it opens a new window inside the main window (IMG2), but when i maximize the main window, the button isnt centred anymore(IMG3), i want to keep it centred, or keep my buttons (i'll have like 5 or 6), and another thing, when i maximize the main window, if a second window is active i want it to maximize too, i tryed to do it with Grid Bag Layouts, but i couldnt make it work, maybe i can do it if i can put a layout inside the JDesktopPane, but i dont really know if this is possible.

my english is not the best, i'll thank every tip you can give me.

thanks for reading me.