For The Financial Sector JCVM Research And Design

At present, the financial IC Card products are mainly used for Java Smart Card. It’s a running java program of microprocessor chip card. It’s the Smart Card technology combined with the Java language. It deepens the Java application level, to overcome the Smart Card hardware and software design and development strongly professional, research and development cycle is long obstacles such as popularization flaws. Set up a convenient, safe and multi-functional platform.Gradually standardization in the field of smart card technology and smart Card application background. The Java Card technology more applied, platform independence and support for its characteristics of dynamic download become a hotspot in research and development of the smart card. Oracle given Java Card specification is a programmatic document. It gives the instructive principles for building a Java Card, but it did not give building Java Card details. Therefore, to construct the Java Card method may be different, even the difference is very big. The basic requirement of how to implement Java Card specifications and as far as possible to ensure Java Card and the application layer and the bottom of the terminal between communication and efficiency is to build the Java Card need to study the main problems.For this research topic is analyzed mainly through the following several aspects:1:Card within InstallerJava Card Interpreter itself is not loaded CAP file. Its only performs in the CAP file contains the code. In the Java Card technology, download and install the CAP files belonging to the mechanism of Installer components complete.2:The CAP and the Export file structureCAP file is on the outside by the application class files through converter conversion, and contains a Java Package defined in all executable binary class and interfaces. It is a one-to-one relationship with Package.3:Atomicity mechanism In the Java Card System, atomicity means guarantee for a permanent object domain (including array element) or to modify a class field or successfully completed, or when an error occurs during the process of change will restore to its original value.4: The processing of APDUsAPDU (Application Protocol Data Unit) refers to the application protocol Data Unit, composed of hexadecimal instruction. The Applet by communication between Java Virtual Machine Card (JCVM) and terminal are implemented through APDU, this paper emphatically introduces the APDU command communication mechanism.For Java Card hardware resources are concentrated on the IC chip, the hardware resource restriction is stronger, especially small storage space, and to meet the relevant financial regulations etc. This paper mainly studies is the most widely used in the field of the current financial and issuing the largest number of Java Card technology in the system. The most critical of the JCVM the design and implementation of communication command.