runtime switching midp1 & midp2 code

[metebalci]

Basically, I need to switch between two canvases. One for midp 1.0 using nokia ui api, and the other is full canvas provided by midp2.0

Is it possible to run a code on the phone that detects midp2.0 and use corresponding canvas ?

I know how to detect midp version. What I am asking is if it is possible in a class loader / jvm point of view. I have read some messages that class loader must load all the classes that is referenced in the application before running the application. Does it depend on phone model/firmware ?

Thanks in advance.

MB

[shmoove]

You can use Class.forName() and Class.newInstance() to discover what classes are supported and instantiate the appropiate canvas.

You can see an example in Nokia's own Block Game.

shmoove

[cervera]

I woudl use System.getProperty("microedition.profiles")
- to test for the MIDP version.


Unfortunately Class.forname("xxx"); will only throw an ClassNotFoundException, if the name startswith "com.nokia..xxxxx" Anything else, e.g. like:
Class.forname("javax.microedition.io.SocketConnection");
or
Class.forName("javax.microedition.media.Player");
will NOT throw ClassNotFoundException or any other exceptions...The program breaks down with this message:
"cannot create class in system package" ....

Cervera

[shmoove]

The program gives you the "cannot create class in system package" because somewhere you have an import statement or an explicit instantiation of the unsupported class.

shmoove