demonstrate the Singleton pattern

Write a Java program (non-GUI preferred) to demonstrate the Singleton pattern.

The key parts of the singleton pattern are:

·         A private static variable to store the single instance called the singleton

·         A public static method for callers to get a reference to the instance

·         A private constructor so no callers can instantiate the object directly

Using these key parts, write a Java program that will allow a user of the program to assign only one runner to each of the 8 lanes of running track in a field.

Include a brief documentation (in the code or in a separate document) to explain the input (if any), processing and output of the program.”