When opening enginesim, a command prompt flashes and goes away

Question

When opening the turbo.class or turbo.java file for enginesim, found here, the command prompt flashes and then exits. Using the commands java -cp . turbo.class, java -cp . turbo.java, java turbo.java, etc, I get Error: Could not find or load main class turbo.class
Also, when just executing java -cp . Turbo from the location of the extracted files, I get Error: Main method not found in class Turbo, please define the main method as:
public static void main (string[]args)
or a javaFX application class must extend javafx.application.Application Windows 7. administrator.