How to disable (or hide) the close (x) button on a JFrame?

Question

I have a window (derived from JFrame) and I want to disable the close button during certain operations which are not interruptible. I know I can make the button not do anyt

Answer 1

For those coming to this later than 2008, there has been a change making it possible to do this. See this link

Second response from the bottom shows how to do it by name.