How can one develop iPhone apps in Java?

If you've completed your other projects, why not take the time to learn Objective-C? There is a ton of material out on the web to help you get started. Honestly, it won't be that hard and learning to do some memory management will be a great learning exercise. Have you programmed in C before?

Most cross compilers won't do a great job in converting your code, and debugging your project may become much more difficult if you develop them this way.

I think we will have to wait a couple of years more to see more progress. However, there are now more frameworks and tools available:

Here a list of 5 options:

• Codename One
• RoboVM <-- Closed
• Avian no maintainer
• XMLVM
• J2ObjC
• Multi-OS Engine not maintained