©2008 Felleisen, Proulx, et. al.
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Methods for weather and dates
Look at the weather data information from the Problem 3.2. Design the following methods for the weather data:
Problem 11.2 in the text.
When the forecasters predict the weather for the next day they
need the method
nextDate, defined in the class
Date. Make it simple - ignore leap years and assume every
month has 30 days.
All problems in this part become one Beginner ProfessorJ program. Use the data definitions and examples from your previous homework or lab whenever appropriate.
When dealing with radio shows we need to keep track of the clock
time. We start by designing some methods for the class
ClockTime that may be useful. Record the time in hours (24
hour clock) and minutes only. Design the method to solve the following
We know the starting time for the show and its duration in
minutes. Produce the
ClockTime for when the show
Remember: One task one method.
At other times we know the starting time and the ending time for
a show and want to compute the duration in minutes.
We want to know which of the two starting times is
We are planning the schedule and want to make sure two shows do
not overlap. For this problem we need to define a class of data to
represent one show. For each show we record its name, the starting
time, and the duration in minutes.
Is the time when one show ends before the time when another show
Is one show the same as another one, other than the starting
time? If the shows have the same name, but not the same duration,
they are considered to be different shows.
We want to schedule a new show to start after this one has
finished. We know the name of the show and its duration.
Methods for taxi vehicles
Look at the classes you defined for the Problem 4.6. Design the following methods for the taxi vehicles:
Compute the fare if you know how many passengers are taking
the taxi and how far they traveled (in whole miles). The fare is
zero if the taxi cannot accomodate the desired number of
Remember: one task one method.
Compute the cost for each passenger, if the group is splitting
the fare evenly. Of course, you will need the same information as
in the previous case.
Determine whether it is cheaper to travel by one type of taxi
or another one, for a given number of passengers and the trip