The Java ME Platform SDK sample projects introduce you to the emulator’s API features and the SDK features, tools, and utilities that support the various APIs. These features can help you customize the sample projects or create applications of your own.
The source code for every demonstration application is available in the installdir/apps directory. Subdirectories contain projects, and each project has a src directory that contains Java programming language source code.
For example, if the SDK is installed in C:\Java_ME_Platform_SDK_3.0, the source code for the SMS sender MIDlet (example.sms.SMSSend) in WMADemo resides in: installdir\apps\WMADemo\src\example\sms\SMSSend.java.