My experience with many Swing apps is the same. I think a large part of the problem lay with the development tools. When you create a new Cococa project in Xcode, it generates a full app with all the necessary parts to feel native. You build it, you have a functioning hello world app with your "File" menu, etc...
In Java, when you create a new Swing app, the IDE (by default) just creates an empty main() method for you. You're expected to create your own menus and windows. Trying to make the app "native" requires a significant amount of work.
In Java, when you create a new Swing app, the IDE (by default) just creates an empty main() method for you. You're expected to create your own menus and windows. Trying to make the app "native" requires a significant amount of work.