I think this comment is spot on. Their own bespoke XWin was replaced by X.Org in 10.5 - well strictly by XQuartz. The Apple Java runtime has already been moving

I think this comment is spot on. Their own bespoke XWin was replaced by X.Org in 10.5 - well strictly by XQuartz. The Apple Java runtime has already been moving closer to the standard Sun one (i.e. default renderer was switched over to Sun's a couple of versions ago). My guess is that we'll either see Oracle take back support for shipping a version, or Apple contributing to OpenJDK (like they do with X.Org) - having A version of Java available on OS X is necessary - but for the most part it is as a web server for developers, not for native GUI development - and it is the latter point where the differences are. (Also doesn't SWT use a different approach to the same native look-and-feel end?)