Mobile Information Device Profile (MIDP); JSR 37, JSR 118 Overview

Contents
 
Introduction
Specifications
Reference Implementations
Technology Compatibility Kit
Development Tools
Optimized Implementation
Benefits
Target Devices
 
Introduction
The Mobile Information Device Profile (MIDP) is a key element of the Java 2 Platform, Mobile Edition (J2ME). When combined with the Connected Limited Device Configuration (CLDC), MIDP provides a standard Java runtime environment for today's most popular mobile information devices, such as cell phones and mainstream personal digital assistants (PDAs). The MIDP specification was defined through the Java Community Process (JCP) by an expert group of more than 50 companies, including leading device manufacturers, wireless carriers, and vendors of mobile software. It defines a platform for dynamically and securely deploying optimized, graphical, networked applications.
 
CLDC and MIDP provide the core application functionality required by mobile applications, in the form of a standardized Java runtime environment and a rich set of Java APIs. Developers using MIDP can write applications once, then deploy them quickly to a wide variety of mobile information devices. MIDP has been widely adopted as the platform of choice for mobile applications. It is deployed globally on millions of phones and PDAs, and is supported by leading integrated development environments (IDEs). Companies around the world have already taken advantage of MIDP to write a broad range of consumer and enterprise mobile applications.
 
Specifications
  • MIDP 2.0 (JSR 118) is a revised version of the MIDP 1.0 specification. New features include an enhanced user interface, multimedia and game functionality, more extensive connectivity, over-the-air provisioning (OTA), and end-to-end security. MIDP 2.0 is backward-compatible with MIDP 1.0, and continues to target mobile information devices like mobile phones and PDAs. More detailed information on these features can be found in What's New in MIDP 2.0.

  • MIDP 1.0 (JSR 37) is the original specification, which provides core application functionality required by mobile applications, including basic user interface and network security.

 
Reference Implementations
  • MIDP RI 2.0 is based on the MIDP 2.0 specification and CLDC RI 1.0.4. The MIDP RI has been created for device manufacturers who want to port this J2ME profile to another platform.

  • MIDP RI 1.0.3 is based on the MIDP 1.0 specification and CLDC RI 1.0.3. Its target audience is manufacturers who want to implement MIDP 1.0 on their devices.

 
Technology Compatibility Kit
The MIDP TCK can be licensed from Sun to certify a CLDC/MIDP implementation on a particular platform. For information about licensing terms, please contact Sun's Java Partner Engineering group.
 
Development Tools
  • The Sun Java Wireless Toolkit provides complete development support for developing MIDP applications, and works in combination with today's leading IDEs.

  • Sun ONE Studio, Mobile Edition is a Java-technology IDE for developing applications that can be deployed to Java technology-enabled mobile devices.

 
Optimized Implementation
MIDP for Palm OS is a J2ME implementation based on the CLDC 1.0 and MIDP 1.0 specifications, optimized for Palm OS 3.5.
 
Benefits
  • Rich User Interface Capabilities: MIDP applications provide the foundation for highly graphical and intuitive applications. The graphical user interface is optimized for the small display size, varied input methods, and other native features of modern mobile devices. MIDP provides intuitive navigation and data entry by taking full advantage of phone keypads, extra buttons such as arrow keys, touch screens, and small QWERTY keyboards. MIDP applications are installed and run locally, can operate in both networked and unconnected modes, and can store and manage persistent local data securely.
 
  • Extensive Connectivity: MIDP enables developers to exploit the native data network and messaging capabilities of mobile information devices. It supports leading connectivity standards, including HTTP, HTTPS, datagrams, sockets, server sockets, and serial port. MIDP also supports the Short Message Service and Cell Broadcast Service capabilities of GSM and CDMA networks, through the Wireless Messaging API (WMA) optional package.
 
  • Multimedia and Game Functionality: MIDP is ideal for building portable games and multimedia applications. A low-level user-interface API complements the high-level UI API, giving developers greater control of graphics and input when they need it. A game API adds game-specific functionality, such as sprites and tiled layers, which take advantage of devices' native graphics capabilities. Built-in audio provides support for tones, tone sequences, and WAV files. In addition, developers can use the Mobile Media API (MMAPI) optional package to add video and other rich multimedia content to MIDP applications.
 
  • Over-the-Air-Provisioning: A major benefit of MIDP is its capability to deploy and update applications dynamically and securely, over the air.
 
  • End-to-End Security: MIDP provides a robust security model that complies with open standards and protects the network, applications, and mobile information devices. HTTPS support enables applications to use existing standards such as SSL and WTLS to send and receive encrypted data.
 
Target Devices
Hundreds of J2ME devices are available in the market today. To find out what devices support MIDP and CLDC, please consult J2ME Devices.

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