I followed this link http://floggy.sourceforge.net/ , which is better floggy framework or RMS
It depends on your use - if define your problem - people can here suggest you something.
Floggy is a free object persistence framework for J2ME/MIDP applications. The main goal of this framework is to abstract the data persistence details from the developer, reducing the development and maintenance effort.
Be aware that floggy stores its data in RMS - it is an abstration layer that sits on top of RMS. As such, it might provide you with a more pleasing programmatic interface to your data, but it cannot offer better performance or reliability.
well, Currently I'm fighting with RMS and the only thing which comes to my mind is " I'm gonna kill myself ", dreaming about SQL in J2ME. BUT remember that official tools are more popular so as a matter of fact You will get the better support and find more ready to go solutions