Java, the general name of Java programming language and Java platform launched by SunMicrosystems on May 23, 1995. The HotJava browser implemented with Java (supported by Javaapplet) showed the charm of Java: cross-platform, dynamic Web, Internet computing. Since then, Java has been widely accepted and promoted by the rapid development of the Web, common browsers are now supporting Javaapplet. Java platform is run by Java virtual machine (JavaVirtualMachine) and Java application programming interface (Application Programming Interface, abbreviated as API). Java application programming interface for Java applications provides a standard interface independent of the Web, which can be divided into basic and extended parts. After Java platform is installed on the hardware or operating system platform, Java platform can run on the standard application platform. Java Pavax2 (Javax2