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

framework A framework is a generic term commonly referring to an essential supporting structure which other things are built on top of. Framework may refer to: Computing * Application framework, used to implement the structure of an application for an op ...

for

Java ME Java Platform, Micro Edition or Java ME is a computing platform for development and deployment of portable code for embedded and mobile devices (micro-controllers, sensors, gateways, mobile phones, personal digital assistants, TV set-top ...

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 telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknow ...

s up to

set-top box A set-top box (STB), also colloquially known as a cable box and historically television decoder, is an information appliance device that generally contains a TV-tuner input and displays output to a television set and an external source of sign ...

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 formalized mechanism that allows interested parties to develop standard technical specifications for Java technology. Anyone can become a JCP Member by filling a form available at thJCP w ...

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 communications. 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 represente ...

CPU with about 2 MB of

RAM Ram, ram, or RAM may refer to: Animals * A male sheep * Ram cichlid, a freshwater tropical fish People * Ram (given name) * Ram (surname) * Ram (director) (Ramsubramaniam), an Indian Tamil film director * RAM (musician) (born 1974), Dutch * ...

, 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 * R ...

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

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

running on an

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

-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 Java Platform, Standard Edition (Java SE) is a computing platform for development and deployment of portable code for desktop and server environments. Java SE was formerly known as Java 2 Platform, Standard Edition (J2SE). The platform uses Ja ...

1.4.2, including a set of security-related optional packages, such as Java Authentication and Authorization Service ( JAAS), Java Secure Socket Extension (

JSSE In computing, the Java Secure Socket Extension (JSSE) is a Java API and a provider implementation named SunJSSE that enable secure Internet communications in the Java Runtime Environment. It implements a Java technology version of the Secure Socket ...

), 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 An Xlet is very similar to a Java applet and is originally introduced in Sun Microsystems's Java TV specification to support applications for Digital TV. Though Xlet looks superficially different from other application models in Java such as applet ...

application programming model is used for application development within this profile, including advanced content on

Blu-ray The Blu-ray Disc (BD), often known simply as Blu-ray, is a digital optical disc data storage format. It was invented and developed in 2005 and released on June 20, 2006 worldwide. It is designed to supersede the DVD format, and capable of sto ...

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 PersonalJava was a Java edition for mobile and embedded systems based on Java 1.1.8. It has been superseded by the CDC The Centers for Disease Control and Prevention (CDC) is the national public health agency of the United States. It is ...

-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 w ...

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 programming language Java, which defines how a client may access a database. It is a Java-based data access technology used for Java database connectivity. I ...

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