ME is the Micro Edition - specialised version for smartphones etc
SE is the Standard Edition. It's all you need for ordinary desktop apps and applets and is (roughly) a superset of ME.
EE is the Enterprise Edition - for large-scale corporate client/server/database apps - it's a superset of SE
Most people start with SE, unless they have a good reason to do something different.
Thank you "Stultuske".
Yes, I know if I use IDE its will be very easy to forget specially java syntax..
But unfortunately its not practical develop some application like server-side application.But while learning concept of these application I never forget implement some basic application using notepad++..