The Apache Commons CLI are the components of the Apache Commons which are derived from Java API and provides an API to parse command line arguments/options which are passed to the programs. This API also enables to print the help related to options available. This app covers most of the topics required for a basic understanding of Apache Commons CLI and to get a feel of how it works.

This app has been prepared for the beginners to help them understand the basic to advanced concepts related to the Apache Commons CLI.

Before you start practicing various types of examples given in this reference, we assume that you are already aware about computer programs and computer programming languages.