嵌入式系统中Java的硬件支持策略

The Strategy of Java's Hardware Support in Embedded Systems

一、概述近来,具有平台无关、面向对象等诸多特点的Java语言得到了迅速的发展,以即时编译技术(JIT)为代表的软件实现的Java虚拟机在桌面系统中日趋成熟,在运行速度、内存需求、实时性能等方面都有较大的提高,以网页中的Java小程序为主的Java应用大量涌现,具备了一定的应用基础。

This paper first analyzes the inside drive of support in hardware for Java virtual machine in embedded Java systems,and the basic requirement and design principles,then it introduces 5 kinds of designs and their primary technology features,and analyzes their chief motivations,advantages and disadvantages, and the possible fields in which they can be applied. Based on all these,the paper presents our Java chip JC401 in which JIT compiler is used,and examines its technology details. At last,the paper makes a simple analysis and summary on all these designs.