It's hardly any "best practice" or "standard", but it looks like people are managing to ship projects with it. Performance is reasonable; on the inside, it's openGL via lwjgl.
Another option is libGDX: http://libgdx.badlogicgames.com/
Their presentations appear to be oriented largely around games, but the parts could be used for a desktop application just as well. There's a number of mobile games in both the app stores using it.