Design the following set of classes so that they work together to simulate a pol

Question

Design the following set of classes so that they work together to simulate a police officer issuing a parking ticket.

A- The ParkedCar Class: This class should simulate a parked car. The class’s responsibilities are:

1- To know the car’s make, model, color, license number, and the number of minutes that the car has been parked.

B- The ParkingMeter Class: This class should simulate a parking meter. The class’s only responsibility is:2- To know the number of minutes of parking time that has been purchased.

C- The ParkingTicket Class: This class should simulate a parking ticket. The class’s responsibilities are:3- To report the make, model, color, and license number of the illegally parked car

4-To report the amount of the fine, which is $25 for the first hour or part of an hour that the car is illegally parked, plus $10 for every additional hour or part of an hour that the car is illegally parked

5- To report the name and badge number of the police officer issuing the ticket

D- The PoliceOfficer Class: This class should simulate a police officer inspecting parked cars. The class’s responsibilities are:

6-To know the police officer’s name and badge number

7- To examine a ParkedCar object and a ParkingMeter object, and determine whether the car’s time has expired

8- To issue a parking ticket (generate a ParkingTicket object) if the car’s time has expired Write a program that demonstrates how these classes collaborate.

Explanation / Answer

public class ParkingTicketSimulator {

/**
* This class should simulate a parked car, see exercise for description of
* responsibilities
*
*/
class ParkedCar {

private String make;
private String model;
private String color;
private String licenseNumber;
private int minutesParked;

public ParkedCar(String make, String model, String color,
String licenseNumber, int minutesParked) {
super();
this.make = make;
this.model = model;
this.color = color;
this.licenseNumber = licenseNumber;
this.minutesParked = minutesParked;
}

public String getMake() {
return make;
}

public void setMake(String make) {
this.make = make;
}

public String getModel() {
return model;
}

public void setModel(String model) {
this.model = model;
}

public String getColor() {
return color;
}

public void setColor(String color) {
this.color = color;
}

public String getLicenseNumber() {
return licenseNumber;
}

public void setLicenseNumber(String licenseNumber) {
this.licenseNumber = licenseNumber;
}

public int getMinutesParked() {
return minutesParked;
}

public void setMinutesParked(int minutesParked) {
this.minutesParked = minutesParked;
}
}

/**
* This class should simulate a parking ticket, see exercise for description
* of responsibilities
*
*/
class ParkingMeter {

private int minutesPurchased;

public ParkingMeter(int minutesPurchased) {
super();
this.minutesPurchased = minutesPurchased;
}

public int getMinutesPurchased() {
return minutesPurchased;
}

public void setMinutesPurchased(int minutesPurchased) {
this.minutesPurchased = minutesPurchased;
}
}

/**
* This class should simulate a police officer inspecting parked cars.
*
*/
class PoliceOfficer {

private String name;
private String badgeNumber;

public PoliceOfficer(String name, String badgeNumber) {
super();
this.name = name;
this.badgeNumber = badgeNumber;
}

public ParkingTicket patrol(ParkedCar car, ParkingMeter meter) {

ParkingTicket ticket = null;

// Calculate the total number of minutes parked over minutes
// purchased
int illegalMinutes = car.getMinutesParked()
- meter.getMinutesPurchased();

// if illegalMinutes, give ticket
if (illegalMinutes > 0) {
// Yes, it is illegally parked.
ticket = new ParkingTicket(car, this, illegalMinutes);
}

return ticket;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getBadgeNumber() {
return badgeNumber;
}

public void setBadgeNumber(String badgeNumber) {
this.badgeNumber = badgeNumber;
}
}

/**
* This class should simulate a parking ticket.
*
*/
class ParkingTicket {

private ParkedCar car;
private PoliceOfficer officer;
private double fine;
private int minutes;

public final double BASE_FINE = 25.0;
public final double HOURLY_FINE = 10.0;

public ParkingTicket(ParkedCar car, PoliceOfficer officer, int minutes) {
super();
this.car = car;
this.officer = officer;
this.minutes = minutes;

calculateFine();
}

private void calculateFine() {

double hours = minutes / 60.0;
int hoursAsInt = (int) hours;

if ((hours - hoursAsInt) > 0) {
hoursAsInt++;
}

// Assign the base fine.
fine = BASE_FINE;

// Add the additional hourly fines.
fine += (hoursAsInt * HOURLY_FINE);
}

public ParkedCar getCar() {
return car;
}

public void setCar(ParkedCar car) {
this.car = car;
}

public PoliceOfficer getOfficer() {
return officer;
}

public void setOfficer(PoliceOfficer officer) {
this.officer = officer;
}

public double getFine() {
return fine;
}

public void setFine(double fine) {
this.fine = fine;
}

public int getMinutes() {
return minutes;
}

public void setMinutes(int minutes) {
this.minutes = minutes;
}

@Override
public String toString() {
return "ParkingTicket [car=" + car + ", officer=" + officer
+ ", fine=" + fine + ", minutes=" + minutes
+ ", BASE_FINE=" + BASE_FINE + ", HOURLY_FINE="
+ HOURLY_FINE + "]";
}

}

public static void main(String[] args) {

// A green car was parked for 125 minutes
ParkingTicketSimulator parkingTicketSimulator = new ParkingTicketSimulator();
ParkedCar car = parkingTicketSimulator.new ParkedCar("Toyota", "2005",
"Green", "ABC123", 125);

// 60 minutes of time was purchased
ParkingMeter meter = parkingTicketSimulator.new ParkingMeter(60);

// Officer Jack was on duty
PoliceOfficer officer = parkingTicketSimulator.new PoliceOfficer(
"Sargent Jack Johnson", "8909");

ParkingTicket ticket = officer.patrol(car, meter);

// Did the officer issue a ticket?
if (ticket != null) {
System.out.println(ticket);
} else {
System.out.println("No crimes committed!");
}
}

}

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