Java

Java Programming Assignment 8: Array Implementation NOTE: This assignment will be more challenging than the previous assignments, so make sure to start early and allocate enough time to complete it, including time you might need to seek any necessary help. Since this is the last program, the program may not be submitted more than 1 day late! Problem Summary A local city would like you to write a program to help them analyze data on speeding tickets. City police have collected information about the speeding violations. They store data about each ticket issued during a one week period in a text data file. Data collected for each ticket includes the vehicle license plate number, the speed limit, and the clocked speed. From past data, the police department knows that it will not issue more than 200 tickets per week. You may assume all data in input data file is valid data (i.e. formatted correctly), but you must verify that the file exists (i.e. can be opened). If the file does not exist, the program will loop until you enter the filename for a file that can be opened. Sample input data file lines: BBB222 50 60 XYZ123 40 45 A1B2C3 30 51 The police department would like you to write a program to read the file, calculate the fines to assess, and generate several reports. The program will:  Read the data from the file, line by line, and store the data into an array that holds ticket data objects. This array will hold a maximum of 200 ticket data objects.  Calculate the speeding ticket fines to assess, based on the ticket data, and store the fines into a second array that holds double values. This array will be sized to the number of tickets issued.  Produce an output file, containing the vehicle license plate numbers and speeding fines.  Analyze the fines to determine the high, low, and average fines, and display the results. Here are the formulas the city uses for calculating a speeding ticket fine: Ticket Fine = Court costs ($45.00) + a fee for each mile per hour (MPH) by which the speed limit was exceeded The fee will be levied as follows: MPH Over Speed Limit Fee per MPH Over Speed Limit (for all MPH over limit) up to 10 $ 4.25 over 10 and up to 20 $ 6.00 over 20 $ 8.10 You must define constants to hold all fixed values (court costs, MPH over speed limits, and fees per MPH) in the above chart within your method that calculates the fines.  This program will implement two different types of arrays. One array will hold ticket objects, and will require an implementation class. The other array will contain primitive data type double values, and will not require an implementation class. NOTE: The ticket array and the fines array will be parallel arrays. This means that the fine will be stored into the fines array using the same index as the ticket object in the ticket array. NOTE: For an example of a Java program implementing arrays, see Online Content section 15.10. Required Classes and Methods Three separate classes will be required for this program.  A class to define a SpeedingTicket object  A class to implement the object array (to hold SpeedingTicket objects)  A main class to run the program 1. Create a new Java NetBeans project, named as follows: LastnameJavaAssn8 For example: SmithJavaAssn8 2. Define a Java class with properties and methods for a speeding ticket object, named: SpeedingTicket The class will have the following private data properties:  vehicle license plate number (a 6-character String)  the speed limit  the clocked speed Within the SpeedingTicket class:  Define a constructor, with parameters for each data property. o Use the parameters to initialize the values.  Define getters for each data property. 3. Define a second class that will implement the ticket array for this program, named: TicketArrayImpl The class will have the following public data properties:  A static constant array size (maximum items that can be held in the array) set to 200 The class will have the following private data properties:  A ticket data array (to hold SpeedingTicket objects)  A count of actual ticket objects stored Note: The data property definitions will only define the array reference variable. It will not create the array object. Within the TicketArraysImpl class:  Define a constructor that will: o Instantiate a ticket array object (using new to initialize the array reference variable and the constant array size) o Initialize the count of tickets stored to 0  Define an instance method to add one SpeedingTicket object to the ticket data array. The method will: o Have one parameter, the ticket object to add o Test to see if the array is full  If the array is full, will throw an ArrayIndexOutOfBoundsException  Include a message to pass to the exception handler that states the array is full and stating which license cannot be added.  Otherwise, store the ticket object into the array and increase the ticket count  Define a method to read all the data from the input file and store the ticket data by adding SpeedingTicket objects into the array. The method will: o Have one parameter: the name of the data input file (String) o Return an int value  If the file was opened successfully, the method will return the number of tickets stored in the array.  Otherwise, it will return 0, to indicate the file could not be opened/read. o Implement code to try to open the input data file. If the file opened:  Display a message that the program is reading the file data  In a loop:  Read the three data items from one line of data in the input data file  Call the constructor to create a new SpeedingTicket object.  Try to call the instance method to add the ticket object to the ticket data array (this is an instance method of the TicketArrayImpl class)  Catch any thrown ArrayIndexOutOfBoundsException exceptions.  Display the message passed back via the throw.  Also display a message that no more data will be read from the file.  Set a value to exit the loop (so no more data will be read). Loop until there is no more file data or an exception is thrown.  Close file.  Display the number of SpeedingTicket objects stored in the ticket data array. o Catch any FileNotFoundException exceptions. When caught:  Display a message that explains which file could not be opened. o Return the count of tickets stored in the array.   Define a method to calculate and store values in the fines array. The method will: o Have one parameter, the empty fines array o Define constants for all fixed values in the calculations (from page 1 of this assignment). o For each ticket stored in the ticket array:  Access the clockedSpeed and speedLimit data stored in the object using getters.  Calculate the ticket fine.  Store the calculated fine in the fines array.  Define an instance method to produce a fines report. The method will create an output file with the fines report. The method should: o Have one parameter, the fines array o Read the filename for the report output file from the user. o Try to open the report output file  If the file opened successfully, generate a report and write it to the output file.  The output file will contain a list of vehicle license plate numbers (accessed via a getter) and the fine associated with that license, with the fines right-aligned on the decimal point.  The last line of the output file will contain the total of all fines collected, rightaligned on the decimal point, with the fines listed above it. Sample output file o Catch any FileIOException exceptions. When caught:  Display a message that explains which file could not be opened and that a fines report will not be generated. 4. Define a third (main) class named: TicketAnalysis Within the TicketAnalysis class:  Define three static methods to: o Determine and return the lowest fine amount o Calculate and return the average fine amount o Determine and return the highest fine amount Each will have the fines array and count of fines in the array as parameters.  Define a static method to display a ticket summary, using the previously defined static methods to calculate the low, high, and average fines. o Parameters: the fines array and count of fines in the array o Ticket summary will be displayed as shown in the sample output on the next page, with all figures will be right-aligned on the decimal point. BBB222 87.50 XYZ123 66.25 A1B2C3 215.10 Total 368.85  Define a main method to: o Display a description of what the program will do to the user. o In a loop (outer loop):  Create a new object of the TickeArraysImpl class.  In a loop (inner loop):  Read the filename for the input data file from the user.  Using the object, call the instance method to read and store the data from the input file (sends a message to the TicketArraysImpl object). Loop until the method returns a number other than 0, indicating the file was read (and that the ticket data array now has ticket data stored in it).  Display a message to the user, that the program is calculating the fines.  Define an array (to hold double fines), the same size as the array for ticket objects.  Uses the TicketArraysImpl object to call:  The instance method to calculate the fines and store them in the array  The instance method to produce a fines report  Execute the static method to display a ticket summary.  Ask the user whether to run the program again, using a different input file. Loop until the user says s/he does not want to run the program again. Sample Run WARNING: The objects, classes, and methods must be implemented exactly as specified above. If your program produces correct output, but you did not create and use the objects as specified, and implement the required classes and methods, you will lose a significant number of points. See last page of the file for outline of code for the three required classes. This program will run analyses on weekly speeding ticket data files Enter input filename: tickets Cannot open input file: tickets Enter input filename: tickets.txt Reading ticket data… Data stored for 3 tickets Calculating fines… Done! Enter name of report output file: report.txt Week’s Ticket Analysis for 3 tickets issued: Lowest ticket fine 66.25 Average ticket fine 122.95 Highest ticket fine 215.10 Run program again with another file (y/n)? n

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