Question

How can i disable the close button (or make it disappear completely if possible) in a java JFace dialog?

Answer 1

See here for an example showing how to hide the close button in a Dialog. You simply override following method:

protected void setShellStyle(int arg0){
    //Use the following not to show the default close X button in the title bar
    super.setShellStyle(SWT.TITLE);
}

Otherwise override close() and return false to prevent closing.

Update: While the above code “solves” the problem at hand, it doesn’t explain a lot, and introduces a nasty bug. Please see Goog’s answer, for a way better version.