The Connected Device Configuration (CDC) is a specification of a framework for

Java ME Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of porting, portable code for embedded system, embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digita ...

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

pager A pager, also known as a beeper or bleeper, is a Wireless communication, wireless telecommunications device that receives and displays Alphanumericals, alphanumeric or voice messages. One-way pagers can only receive messages, while response p ...

s up to

set-top box A set-top box (STB), also known as a cable converter box, cable box, receiver, or simply box, and historically television decoder or a converter, is an information appliance device that generally contains a Tuner (radio)#Television, TV tuner inpu ...

es.CDC Overview http://java.sun.com/javame/technology/cdc/overview.jsp The CDC was developed under the

Java Community Process The Java Community Process (JCP), established in 1998, is a formal mechanism that enables interested parties to develop standard technical specifications for Java technology. Becoming a member of the JCP requires solid knowledge of the Java program ...

as JSR 36JSR 36, CDC 1.0.2 http://www.jcp.org/en/jsr/detail?id=36 (CDC 1.0.2) and JSR 218JSR 218, CDC 1.1.2 http://www.jcp.org/en/jsr/detail?id=218 (CDC 1.1.2).

Typical requirements

Devices that support CDC typically include a 32-

bit The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represented as ...

CPU A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary processor in a given computer. Its electronic circuitry executes instructions of a computer program, such as arithmetic, log ...

with about 2 MB of

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, and 2.5 MB of

ROM Rom, or ROM may refer to: Biomechanics and medicine * Risk of mortality, a medical classification to estimate the likelihood of death for a patient * Rupture of membranes, a term used during pregnancy to describe a rupture of the amniotic sac * ...

available for the Java application environment. The reference implementations for CDC profiles are based on

Linux Linux ( ) is a family of open source Unix-like operating systems based on the Linux kernel, an kernel (operating system), operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically package manager, pac ...

running on an

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...

-compatible PC, and optimized implementations are available for a variety of other CPUs and operating systems.

Profiles

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.

Foundation Profile

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 219JSR 219, Foundation Profile Specification http://www.jcp.org/en/jsr/detail?id=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).

Personal Basis Profile

The Personal Basis Profile provides a superset of the Foundation Profile APIs and supports a similar set of devices, with lightweight graphical user interface requirements. A framework for building lightweight graphical user interface components is provided with support for some AWT classes. There are no heavyweight GUI components provided because these components assume the availability of a pointing device such as a mouse. The specification is described in JSR 217JSR 217, Personal Basis Profile Specification http://www.jcp.org/en/jsr/detail?id=217 and is used for products that require a standards-based graphical user interface but without full AWT compatibility. The Xlet application programming model is used for application development within this profile, including advanced content on

Blu-ray Blu-ray (Blu-ray Disc or BD) is a digital optical disc data storage format designed to supersede the DVD format. It was invented and developed in 2005 and released worldwide on June 20, 2006, capable of storing several hours of high-defin ...

discs conforming to the

BD-J BD-J, or Blu-ray Disc Java, is a specification supporting Java ME (specifically the Personal Basis Profile of the Connected Device Configuration or CDC) Xlets for advanced content on Blu-ray Disc and the Packaged Media profile of Globally Execut ...

specification.

Personal Profile

The Personal Profile extends the Personal Basis Profile with a GUI toolkit based on AWT. It provides a complete Java ME application environment with full AWT support and is intended for higher end devices, such as PDAs, smart communicators, set-top boxes, game consoles, automobile dashboard electronics, and so on.J2ME FAQ, Writing an application for the J2ME Personal Profile http://developers.sun.com/mobility/personal/questions/gui/ This is the recommended profile for porting of legacy PersonalJava-based applications. The specification is described in JSR 62JSR 62, Personal Profile Specification http://www.jcp.org/en/jsr/detail?id=62 and uses the

Applet In computing, an applet is any small application that performs one specific task that runs within the scope of a dedicated widget engine or a larger program, often as a plug-in. The term is frequently used to refer to a Java applet, a program ...

programming model for application development.

Optional Packages

CDC supports a number of optional packages that allow developers to access specific pieces of extra functionality within the restricted resource constraints of a Java ME device. * The RMI Optional Package provides a subset of Java SE RMI for distributed-application and network communication. * The

JDBC Java Database Connectivity (JDBC) is an application programming interface (API) for the Java (programming language), Java programming language which defines how a client may access a database. It is a Java-based data access technology used for Java ...

Optional Package provides a subset of the JDBC 3.0 API for accessing data sources, including spreadsheets, flat files and relational databases.

References

{{Reflist

External links

CDC home page
Java device platform Java specification requests