How to disable the iconifibility of a window ? as the resizability can do. So the window behaviors like a popup window or a dialog with the only ability of closable.
disabling the "iconify" button individually is not possible right now, we track the request here: https://javafx-jira.kenai.com/browse/RT-31903
For the popup dialog that is only closeable, you can use UTILITY stage style:
Stage popupDialog = new Stage(StageStyle.UTILITY);