SCMAD学习笔记-考纲(1)
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JTWI概览-熟悉无线应用
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Identify the goals and characteristics of the JTWI specification (JSR 185), including the mandatory specifications, conditionally required specifications, and the minimum configuration. Compare the relationship and differences between JTWI and other wireless Java technologies.
掌握JTWI规范的目标和特性(包括强制的,有条件需要的和最小配置). 比较JTWI与其他无线JAVA技术的关系和不同点.
Develop portable applications that are compatible with the requirements and restrictions an application programmer must adhere to, in order to ensure compatibility with a JTWI-compliant device, including resource minimums (standard-size application), clock resolution, and the use of preferred Multi-Purpose Internet Mail Extensions (MIME) names as applicable to Connected Limited Device Configuration (CLDC) 1.0 and 1.1, Mobile Information Device Profile (MIDP) 2.0, Wireless Messaging API (WMA) 1.1, and Mobile Media API (MMAPI) 1.1).
开发便携应用
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The goal of the JTWI specification is to improve the compatibility, interoperability and completeness of J2ME technology implementations in mobile phones. The JTWI specification minimizes API fragmentation and raises the bar of functionality for high-volume devices thereby broadening the already substantial base of applications that have been developed for mobile phones.
目标:改善J2ME技术在移动电话上执行的兼容性、互用性和完整性。JTWI规范减少了API分化并消除了功能性障碍。
This specification achieves these goals in three ways:
本规范通过三条途径达到以上目标:
_ First, it specifies a common set of APIs by requiring the use of a number of component specifications such as the MIDP Specification version 2.0 (MIDP 2.0). In some cases, these specifications provide uniform access to services that were once only available through device specific APIs, or not at all.
首先,它通过一些子规范制定了一套公共API集合,如:MIDP2.0。
_ Second, it mandates elements of the component specifications, thereby eliminating optional features and improving compatibility.
其次,它管理子规范的基础,消除可选特性改善兼容性。
_ Third, some elements of the component specifications have been clarified within this specification.
第三,一些子规范的基础已经在本规范中得到阐述。
The specification leads of the component specifications (such as MIDP 2.0 or WMA 1.1) have been proactive participants in the JSR-185 expert group and the development of this specification. They have been active in proposing clarifications included in this specification, and they have also taken responsibility for additional issues that will be resolved separately in maintenance release of the component specifications.
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