Reflection on J2ME

Question

Hello to all!
I'm trying to write a java application for both J2ME and J2SE.
Im using some advanced features of J2ME like Connector, HttpConnection, Manager, Player, etc. which do not exist on the J2SE.
I was thinking about splitting my classes to a J2ME class and a J2SE class which both implement the same interface and dynamically construct an object acroding to the platform the application runs at runtime, however, I see that J2ME does not support reflection or any other type of dynamic method invokation.
Can you see any possible solution to my problem except making 2 types of the exact same class and recompiling it for each platform?
Thanks in advance!

Answer 1

At least some J2ME profiles (for example, CLDC 1.1) have reflective support for object creation. There are Class.forName(String) and Class.newInstance(). You can create instance via Class.forName("my.impClass").newInstance() and cast this instance to an interface.
But having 2 types of same class is also acceptable approach. Just create a "platform library", which will include all platform-specific classes. You will have several implementations of such library (one for J2SE, one for J@ME), but all these implementation will have same set of "public" classes and interfaces. During packaging process you will be able include proper "library implementation" in resulting package/distribution (add it's content to application jar, for example).
In any case, you should consider proper packaging, because usually J2ME devices is limited and having "J2SE classes" will be an extra burdern. For example, some mobile phones have jar size limit about 128Kb, and excluding 10Kb of "J2SE stuff" from distribution will give you sensible amount of extra "jar-size".