Use RMI to implement a simple message service. This should allow messages to be stored for a number of users, and for users to be able to retrieve their messages.
The "server" component of your system will need to store the messages. This
can be done very easily using a hash table (see the Hashtable class in the
java.util package) where the keys are the usernames and the associated values
are lists of strings (the java.util package also contains a number of classes that
can be used for the lists).
The client side can be written either as a single program containing the logic for both storing and retrieving messages, or as separate programs for the two purposes. The client(s) can be written as GUI programs or as command-line applications, as you prefer.
Remember, your starting point should be to define the interface that will specify the
methods to be provided by the server for the client(s) to use. The source files for
the Mandelbrot example discussed in lectures are
available —
you might like to familiarise
yourself with the use of RMI by compiling and running this. Remember that you will need to run
an RMI registry service too. As the registry will need access to the class files for your
application, you should run it in the same directory as your application (or else, with
appropriate CLASSPATH settings).
You should submit the source files for your interface and the programs (server and client(s)).