To find out which devices use which platform release, see Nokia Developer device specifications.
For technical details that you cannot find in the Java Developer's Library, see the Java articles in the Nokia Developer Wiki. There you will find how-to articles, code examples, and known issues articles related to Java ME. You can also search for existing or report new Java errors in Developer Nokia Bugs.
If you cannot find the required information from the Java Developer's Library or the above resources, or if you need help in troubleshooting a technical issue, try one of the following:
Post on the Java ME Discussion Board on Nokia Developer. On the Java ME Discussion Board, technical experts and developers discuss about various Java ME issues on a daily basis.
Submit a support request to Nokia Developer Technical Support. Nokia Developer Technical Support offers technical expertise to mobile developers during the application development process. Nokia Developer Technical Support is designed to solve a specific problem or answer a specific technical question. You are charged a fixed fee for each support request.
This document describes the SATSA-CRYPTO API and its functionality.
PDA Optional Packages for Java ME specification (JSR-75) including PIM API and FileConnection API
For porting Android applications to the Series 40 platform, see Porting to Series 40.
You can expand your application coverage by porting your Android applications to Series 40. The porting process is explained with the help of two complete application porting cases: a game and a social media application. The library contains code snippets on important application areas and technologies, feasibility comparisons on application types and segments, and a user interface comparison between Android and Series 40 touch devices.
In order to extend the availability of your Nokia Asha and Series 40 platform MIDlets to Symbian devices as well, see Porting MIDlets from Nokia Asha to Symbian
Now that new Java ME tools and documentation have been optimised for Nokia Asha and Series 40 development, here is guidance and instructions how you can still develop and maintain (for maximal audience) Java ME applications for Symbian as well, see How to develop Java ME applications on Symbian
Already ported your Symbian MIDlets to Nokia Asha? If not, you should. Or not just port, but do something better. In order to take advantage of the huge and expanding Nokia Asha and Series 40 platform device base, and to utilize the new features of Nokia Asha software platform, Porting MIDlets from Symbian to Nokia Asha