BlackBerry’s Java Development Environment (JDE) is crucial for a developer to understand, because it's the heart and soul of the development process. The JDE is a fully-integrated development environment and simulation tool for building Java Platform, Micro Edition (Java ME) applications. BlackBerry’s JDE is a Mobile Information Device Profile (MIDP) compliant Java ME environment, which is ideal for developers who want to uphold seamless portability in their wireless applications. Read More... (http://www.devshed.com/c/a/Smartphone-Development/The-BlackBerry-Java-Development-Environment-Inside-and-Out/)