Java Lab #12: Comparable Interface

Continue extending the Figs project by taking the following steps.

• Modify class Date so it implements the interface Comparable<Date>. This entails adding a compareTo method. Read about what the method is supposed to do in the documentation for Comparable.
• Modify class Time and also class Event similarly. Notice that your compareTo in class Event effectively defines the "natural order" of events. Define it so that events are naturally in chronological order. In the case where two events have the same date and time, use compareTo on the description to decide the order.
• In Datebook's addEvent method use Collections.sort to sort the datebook according to the natural order of events. This allows you to eliminate the tricky and error prone code that inserts an event in the correct place. Instead just insert the event at the end of the list and sort the entire list to force the new event to find its correct location.

Send me the files you modified.