JoptionPane.showmessegeDialog that close after 20 seconds

[itaipee]

I want to have Simple messeging , like JoptionPane.showmessegeDialog - but that close by itself , after some time even the user did not push the ok button


Is there any way that do not include new treads - I'm afraid that opening new treads every time I want to make timer-Messege might overload my program which is quite slow as it is.

[Fubarable]

This can be done by using a Swing Timer and a JDialog.