J2ME MIDP中RMS的设计实现与性能优化  

RMS Design and Performance Tuning in J2ME MIDP

作　　者：李莹[1] 王昕[1] 毛迪林[1] 高传善[1] 

机构地区：[1]复旦大学计算机科学与工程系,上海200433

出　　处：《计算机工程》2006年第16期52-54,69,共4页Computer Engineering

基　　金：Intel公司基金资助项目"J2ME Class Lib swith Small Foot print;Low Power and High Performanceon XScale Processor"

摘　　要：移动信息设备框架(MIDP)是J2ME中一套重要的类库。作为MIDP的一部分,记录管理系统(RMS)实现了在手机等微小型系统上持久存储的能力。在Intel开发的虚拟机(XORP)和开发的CLDC的基础上,实现了MIDP中的RMS模块。该文介绍了对记录管理系统的设计思想,比较了两种不同设计方案的优劣,并介绍了实现细节。进一步分析了在性能优化方面做的工作,并将最终结果与Sun的实现作了比较。Mobile information device profile （MIDP） is an important class library in J2ME technology. As part of MIDE record management system （RMS） provides a mechanism for persistent storage on small, handheld devices with limited capabilities. This paper designs and implements RMS of MIDP based on Intel＇s virtual machine named XORP, as well as own developed CLDC. This paper first compares the two initial designs of RMS, and then gives a description of the final implementation. After that, it presents the performance tuning techniques, and compares both pre- and post-tuned performance with Sun＇s WTK.

关 键 词：J2ME 移动信息设备框架 记录管理系统 性能优化 记录 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]