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。

关键词: J2ME, 移动信息设备框架, 记录管理系统, 性能优化, 记录

Abstract: Mobile information device profile (MIDP) is an important class library in J2ME technology. As part of MIDP, 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.

Key words: J2ME, Mobile information device profile (MIDP), Record management system (RMS), Performance tuning, Record

中图分类号: 

• TP 311