Ubuntu minimal edition

Hi , i installed Ubuntu 16.04 LTS minimal edition
i’m using openbox as my window manager , the problem is i created java app and tried to run it over openbox ,but it’s not working proberly my app have 5 windows 3 decorated and 2 undecorated
the two undecorated windows are the problem cause they supposed to be at the bottom of screen one right and the other left but sometimes those two undecorated windows appear at top of screen any help

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.