JDialog decorated true but without close button

Okay, researching I saw a lot of posts regarding to the topic "hide close button from dialogs" but none of them solved my problem.The thing is I have this Dialog:

enter image description here

which I would like to keep the decoration (borders, transparency and etc) but I would like to hide or remove the close button component cos I will handle this with the cancel button.

If I use

setUndecorated(true);
getRootPane().setWindowDecorationStyle(JRootPane.NONE);

the result I will get is

enter image description here

which for me its completely terrible(not at all here since nothings on background)...so I ask: is there another way to handle this problem with dialog or setUndecorated and getRootPane are absolute? Futher suggestions are very welcome. Thanks in advance.

Solution

You cannot remove the "X" button without messing with UI code (low level LAF or even native api), I dont know is it worth of the effort. However, if you REALLY REAAAALLLLLY need such functionality (and you will get lots of money for that;P) you can always write native code that would hide the X button (yes that is totally possible), but again, that is not worth of your time :)