SE450: Homework [18/18]

Read Jia Chapters 4 and 5. Pay special attention to the StringTokenizer, the BufferedReader, and the FileReader as you read chapter 4.

Read pages 1-23 of Principles and Patterns by Robert Martin.

Goal: Learn more of the Java APIs. Practice writing more code, debugging, and using multiple source files. Develop some base code for further homework assignments. Improve practices from first homework assignment.

Assume that you have a file of flight records. It is a text file in which each line contains a single record, and each record consists of the following colon-delimited fields:

Airline Code: Airplane Type: Flight Number : Departing Airport : Arriving Airport: Time

A sample line is as follows:

ASA:B73Q:144:ORD:SFA:13

Assume that the time is just a whole hour in 24HH format, as an integer. All other records are strings

Write a Java application that will read in a data file from a command line argument and do the following:

• Read in all of the flights in the file.
• Instantiate one Airline object for each Airline in the file (i.e. multiple flights should share a reference to the same Airline)
• Instatiate one Flight for each flight record in the file.
• Store the Flights and Airlines in an appropriate Collection.
• a) Print a list of destination airports in alphabetical order, where each airport is followed by the next arriving flight information (if a tie, print them all)
• b) Print each airline with the next arriving flight (regardless of city)
• c) Print the airline with the most flights (if a tie, print them all)

Implement the solution in at least two source files, one called se450.studentid.hw2.Main, one called se450.studentid.hw2.Airline, and one called se450.studentid.hw2.Flight. Replace studentid with your DePaul id.

Choose a good container for the flights as you work with them in your code, and use an Iterator when you have to traverse the collection of flights.

The Flight class should contain a reference to the Airline, and store the airport codes and airplane types as Strings. The time should be stored as an Integer.

Override toString to provide a meaningful String representation of the flight.

The program should take one argument, the filename of data, and provide the output for parts (a), (b), and (c) all at once. If you are having trouble with "screen blindness", then redirect the output to a file for offline reading like this: java se450.studentid.hw2.Main flights.txt > output.txt

Ask questions on the discussion board!

Submit a zip file that contains all necessary .java files as well as grader.txt, in the correct package structure, just as last week.

Don't include any class files

Due next Monday at 5:30 PM.