Java, intermediate programming.

Demonstrate how to develop a client/server application with sockets in Java. Provide a sample code snippet or an executable application (e.g. two-way messaging program over network) for demonstration.

Demonstrate how to develop a Java application with RMI (Remote Method Invocation). Provide a sample code snippet or an executable application for demonstration.

Demonstrate how to create program API document with JavaDoc utility. Provide sample classes and the document, in HTML format, created from the class source files.