J2ME为移动无线设备带来了Java语言的平台无关性,能够动态地、安全地以各种类型的网络向移动无线设备传送交互内容和应用程序,并可以按用户的需求定制应用程序。连接限制设备配置(CLDC)将基本运行时环境定义为一组核心类和一个运行在特定设备上的特定JVM。然而,J2SE中所能提供的安全机制远远超过了支持CLDC的Java虚拟机(JVM)所能够承受的内存负荷,因此CLDC的安全模型采取了某些折中的措施,而且模型简单,允许以后的进一步扩充。首先介绍了J2ME平台,接着介绍了CLDC,最后对CLDC的安全机制进行了详细的研究。 J2ME brings platform independence to the Java language for mobile wireless devices, enabling dynamic and secure delivery of interactive content and applications to mobile wireless devices across all types of networks and customizing applications to the user’s needs. Connection Limitation Device Configuration (CLDC) defines a basic runtime environment as a set of core classes and a specific JVM running on a specific device. However, the security mechanisms available in J2SE far exceed the memory load that the CLDC-enabled Java Virtual Machine (JVM) can afford, so the CLDC’s security model takes some trade-offs and the model is simple enough to allow future The further expansion. First introduced the J2ME platform, followed by the introduction of the CLDC, the last of the CLDC security mechanism for a detailed study.