Please note that as of October 24, 2014, the Nokia Developer Wiki will no longer be accepting user contributions, including new entries, edits and comments, as we begin transitioning to our new home, in the Windows Phone Development Wiki. We plan to move over the majority of the existing entries. Thanks for all your past and future contributions.
Sun Java Wireless Toolkit for CLDC
The toolkit includes the emulation environments, performance optimization and tuning features, documentation.
You can download it from Sun website.