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Connected Device Configuration


The Connected Device Configuration (CDC) is a specification of a framework for Java ME applications describing the basic set of libraries and virtual-machine features that must be present in an implementation. The CDC is combined with one or more profiles to give developers a platform for building applications on embedded devices ranging from pagers up to set-top boxes. The CDC was developed under the Java Community Process as JSR 36 (CDC 1.0.2) and JSR 218 (CDC 1.1.2).

Devices that support CDC typically include a 32-bit CPU with about 2 MB of RAM, and 2.5 MB of ROM available for the Java application environment. The reference implementations for CDC profiles are based on Linux running on an Intel-compatible PC, and optimized implementations are available for a variety of other CPUs and operating systems.

A profile is a set of APIs that support devices with different capabilities and resources within the CDC framework to provide a complete Java application environment. Three profiles are available, which build on each other incrementally and allow application developers to choose the appropriate programming model for a particular device.

This is the most basic of the CDC family of profiles. Foundation Profile is a set of Java APIs tuned for low-footprint devices that have limited resources that do not need a graphical user interface system. It provides a complete Java ME application environment for consumer products and embedded devices but without a standards-based GUI system. Version 1.1.2 is specified in JSR 219 and implements a subset of Java SE 1.4.2, including a set of security-related optional packages, such as Java Authentication and Authorization Service (JAAS), Java Secure Socket Extension (JSSE), and Java Cryptography Extension (JCE).


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