Design Patterns Java™ Workbook

Chapter 4. Facade

CHALLENGE 4.1

Complete the diagram in Figure 4.4 to show the code for FlightPanel_1
refactored into three classes: a FlightPath class, a reduced FlightPanel class
that draws a flight path, and a SwingFacade class. Provide the facade with
the utility methods that appeared in the initial FlightPanel_1class. Also provide
the facade with a method to launch a frame.

Figure 4.4. This diagram shows the flight path application refactored into classes

that each have one job.