The JAVA applet and the Java Virtual Machine(JVM) within the web-browser 
brings a new representation to the World Wide Web page.
And many browser programs now are embedding the JVM.
The specification of the JVM is published on the Internet, and anyone
can make his own JVM.
In this report, our study on the implementation of JVM will be
presented. And the process of the designing JVM by undergraduate
students, and the design issue to exploit higher performance from JVM,
and the future work will also be presented.