Read the Expectations on Homework and the Homework Tips.
This assignment is designed to help you think about where data and computations belong in a well-designed object-oriented program. Methods that produce the right answers--but aren't structured well--won't earn you many points. Figuring out where to put the various pieces of data--and what methods you need to create to work with the data--are part of the what you are being asked to figure out.
Although the assignment is described in two parts, you'll only be submitting the program for Part 2. However, we suggest you work through Part 1 as an initial implementation, then make the modifications described in Part 2.
WeatherMonitor class with (at least these) two methods:
averageTempForMonth, which takes a month (designated by a number such as 1 for January, 2 for February, etc) and a year and produces the average temperature over all days that month.*
totalRainfallForMonth, which takes a month (designated by a number such as 1 for January, 2 for February, etc) and a year and produces the total rainfall over all days that month.*
Readings containing the Time of the reading (hour and minute, both ints), the temperature in degrees Fahrenheit (use a double), and the amount of rainfall since the last reading (use a double). Because the volume of readings is so high, your weather monitor will store daily weather reports that each have all of the readings for that particular day. A DailyWeatherReport contains the date (use the Java class GregorianCalendar, see description below) and two LinkedLists: one for the temperature readings and one for the rainfall for that day.
To manage the daily weather data, your WeatherMonitor must also provide a method addDailyReport that consumes a date and a list of readings (nominally for that date) and stores a daily report for the given date. For Part 1 of this assignment, the WeatherMonitor's daily reports should be stored in a LinkedList. (You may assume that a daily report for the provided date does not already exist.)
(* We won't actually require you to provide examples of daily weather reports for every single day in a month. Your calculations of averageTempForMonth and totalRainfallForMonth should produce the averages over all days in the month for which there are daily weather reports.)
GregorianCalendar. This is a type available in the java.util library. Look at the Java API to learn how to use GregorianCalendar. Here are a couple of hints to get you started:
When constructing a date for a daily weather report, use this version of the GregorianCalendar constructor:
public GregorianCalendar (int year, int month, int dayOfMonth)
To extract individual pieces of information from objects of type GregorianCalendar, use the get() method (inherited from the abstract Java class Calendar). Here's an example of how to extract the month:
GregorianCalendar date = new GregorianCalendar(2016, 11, 17);
int month = date.get(GregorianCalendar.MONTH); // value of month will be 11
Thinking ahead, you know that the weather monitor program should be able to support different data structures for the daily weather reports. Edit your code as needed to encapsulate the type of the daily weather reports from the overall WeatherMonitor class.
A WeatherMonitor constructor should take an interface type as its argument, and any fields that hold a DailyWeatherReport object should have an interface type.
A rogue hacker wants to modify the weather data in order to create a false panic about a pending natural disaster. The hacker has access to a
WeatherMonitor object. Edit your code as needed to guarantee that the hacker cannot change any of the daily weather reports or their readings. For DailyWeatherReport, please do not write methods that simply return the lists of temperatures and/or rainfall for that day.
Something to think about: in Part 1 you were asked to define two methods, averageTempForMonth and totalRainfallForMonth. Presumably, the code you developed for these two methods will have some similarities. We've talked about why duplicating code is undesirable. Were you able to come up with a way to eliminate the duplicate code? For those of you who took CS 1101/1102, would you have handled the task of eliminating the duplicate code differently in Racket?
DailyWeatherReportReadingTimeWeatherMonitorWeatherMonitor class (addDailyReport, avgTempForMonth, totalRainfallForMonth), must conform to the signatures described above.
Programs must compile in order to receive credit. Code that is commented out will not be graded.