The java programming language is a mature, well understood language that powers many enterprises and public web applications. Originally design for the consumer electronics market, it was quickly adopted as general purpose, versatile language relatively easy to learn and master.

Classes are the fundamental abstraction in the language. Understanding their structure, layout and semantics is essential. In particular a clear understanding of the difference between static and regular attributes & methods + the role of the Object pseudo class is essential.

The set of control statements are largely inherited from C and C++. There are small number of these and their structure and behaviour is largely unsurprising.

Behind the language are a set of well-understood principles. These principles are independent of Java, but underpin its structure and meaning. Understanding these principles is important and is a useful starting point for comparing Java and the features of other programming languages.

This is your first assignment. It is a java console application, whose specification is presented here. A useful working pattern over the next few weeks would be to complete each lab, and and then evaluate the specification (and the project of the lab) and see where you need to go with it.

Evolve the application developed in lab01 into a simple command line app. Incorporate commands for creating, deleting and listing users. Explore List, ArrayList, Map, HashMap in this context and introduce the guava and cliche libraries.