The singleton object TestApp represents a simple application that a programmer can use to experiment with the main functionality of the classes from package o1.auctionhouse.
NOTE TO STUDENTS: In this course, you don’t need to understand how this object works on the inside. It’s enough to know that you can use this file to start the program.
A GUI application's version of the main method. Called by the default main method implementation provided by this class. Implement to return the top-level frame of this application.
A GUI application's version of the main method. Called by the default main method implementation provided by this class. Implement to return the top-level frame of this application.
