||The Configurations section manage
configurations of your project. The active configuration contains the device
the project is compiled against, and also the default device used when
launching the MIDlets in the project. See more information at configuration document.
When active configuration changes, the contents of your project are
automatically recompiled. Thus, if you build a project using the MIDP 2.0
platform and then change to a MIDP 1.0 platform definition, your project may
no longer compile because of references to classes, methods or constants not
present in the MIDP 1.0 definition.