Java Technology for the Wireless Industry (JTWI); JSR 185 Overview

Contents
 
Introduction
Reference Implementation
Technology Compatibility Kit
Benefits
 
Introduction
The Java Technology for the Wireless Industry (JTWI) specification, JSR 185, defines the industry-standard platform for the next generation of Java technology-enabled mobile phones. JTWI is defined through the Java Community Process (JCP) by an expert group of leading mobile device manufacturers, wireless carriers, and software vendors. JTWI specifies the technologies that must be included in all JTWI-compliant devices: CLDC 1.0 (JSR 30), MIDP 2.0 (JSR 118), and WMA 1.1 (JSR 120), as well as CLDC 1.1 (JRS 139) and MMAPI (JSR 135) where applicable. The specification raises the bar of functionality for high-volume devices, while minimizing API fragmentation and broadening the substantial base of applications that have already been developed for mobile phones.
 
Reference Implementation
A binary copy of the JTWI reference implementation is available simply by sending an email to jtwi-comments@sun.com. Application developers who want to test their application against the RI, however, should instead download the J2ME Wireless Toolkit 2.1, which includes additional tools and utilities for developing JTWI-compliant applications.
 
Technology Compatibility Kit
The JTWI technology compatibility kit can be licensed from Sun to certify a JTWI implementation on a particular platform. For information about licensing terms, please contact Sun's Java Partner Engineering group.
 
Benefits
  • Interoperability: The goal of this effort is to deliver a predictable environment for application developers, and a deliverable set of capabilities for device manufacturers. Both benefit greatly by adopting the JTWI standard: manufacturers from a broad range of compatible applications, software developers from a broad range of devices that support their applications.

  • Clarification of security specification: The JSR 185 specification introduces a number of clarifications for untrusted applications with regard to the "Recommended Security Policy for GSM/UMTS-Compliant Devices" defined in the MIDP 2.0 specification. It extends the base MIDlet suite security framework defined in MIDP 2.0.

  • Road map: A key feature of the JTWI specification is the road map, an outline of common functionality that software developers can expect in JTWI-compliant devices. January 2003 saw the first in a series of road maps expected to appear at six- to nine-month intervals, which will describe additional functionality consistent with the evolution of mobile phones. The road map enables all parties to plan for the future with more confidence: carriers can better plan their application deployment strategy, device manufacturers can better determine their product plans, and content developers can see a clearer path for their application development efforts.


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