First Class — Not Typical

Minimal Class for a Minimal Program

• Consists of 1 class, 1 method, and 1 statement.

    /**
     * Simple program example:
     * This is the simplest type of class that produces output.
     * It has 1 class, with a single method that has a single statement.
     *
     * @author Ann Instructor, 1 January 2016
     */
    public class VerySimpleProgramClass
    {
        /** The main function initiates execution of this program. */
        public static void main()
        {
            System.out.println ("Hello, world!");
        }
    }

• Not a typical class: provides a structure for its single method, but it does not define a new type — does not encapsulate data and a set of operations that act on that data.
• We can use it, though, as a starting point for a program whose other classes DO define new data types. The main method is an example of pure client code.