James Duncan Davidson wrote about the state of Java on Mac OS X and I saw a comment that was dead-on:
I agree Apple is focused more on server-side Java on the Mac, but keep in mind that there is at least one really important Java desktop app that server-side developers care about: Eclipse. If Eclipse doesn’t run well on the Mac, all of those server-side Java developers go elsewhere…
I don’t know if all those server-side Java developers actually would switch back to Linux or a Windows machine, but I think the point is that Eclipse needs to run well on Mac, period. BTW, there is an Eclipse on Mac users group.
Later, James added:
Important tasks like building GUI applications. There are a few decent Java based GUI apps out there. However, I find it telling that the best GUI applications out there written in Java are IDEs in which to develop Java code. I’ve seen a handful more, usually at the pace of one a year, that work well and provide a great user experience. But in general, the evidence says that Java, or at least Swing, isn’t the greatest language or library for building GUI applications with. SWT may be, but that still remains to be seen.
I’ll add some more observations:
1. Eclipse RCP Apps (which are built with SWT) will probably change things. On OS X, they are built on the Carbon framework currently and they look and feel native. More importantly, RCP makes building a full featured app easier. With Swing, you have had to build an app framework yourself. That is not a trivial task. I know since I have played a part in building and maintaining one.
That’s one of the reasons why the IDEs are the main Java apps right now, since they have enough people to build these application frameworks with enough left over to build the actual Java tooling bits. Fortunately for the rest of us, the Eclipse team is now sharing that wealth with us to build desktop apps (they call them rich clients).
2. Enterprise desktop apps that need to run multi-platform (Windows, Linux, OS X, etc) are usually written in Java. However, you don’t see many of these apps because they’re not marketed towards consumers.
3. Apple does have good support for Java, they had a strong presence at EclipseCon, and they are currently looking for an engineer (who knows SWT among other things) to improve the Java support even further.
I think Apple will probably continue to ensure a good Java experience on OS X, but continue to expose the OS X specific APIs mostly just to Cocoa and Carbon. That is ok, since they are (mostly) targeting different markets: Java / RCP -> Enterprise Cross-Platform Desktop and Objective-C / Cocoa -> Consumer OS X Desktop.