The SDK supports three technology platforms, also called stacks. They are: CLDC and MIDP Stack, CDC Stack, and BD-J Stack, as discussed in Emulation Platforms. In addition, it supplies the JavaFX runtime, as discussed in JavaFX Platform.
A project runs on a particular emulation platform. The device manager determines whether a device is appropriate for your project based on the platform, the APIs your application uses, and a set of device properties. If you run an application and an appropriate emulator or device is already running, the SDK automatically installs and runs your application. You don’t have to launch the emulator over and over.
The SDK supports integration with devices running Windows Mobile and third-party emulators. You can use the SDK to deploy to a real device and perform on-device debugging.