Thread: Trouble accessing variables from other classes

I'll try to keep this short.

I need to access ParkedCar.minutesParked and ParkingMeter.minutesPurchased from ParkingTicket.calculateFine() and I keep getting an error that the variable isn't visable. I understand why it's happening, the variables are set to private. But, I'm working off of a UML, so they have to stay that way.

Any suggestions would be great.

 
public class ParkedCar {
	private String make;
	private String model;
	private String color;
	private String licenseNumber;
	private int minutesParked;
 
	public ParkedCar(String mk, String mod, String col, String lic, int min)
	{
		make = mk;
		model = mod;
		color = col;
		licenseNumber = lic;
		minutesParked = min;
 
	}
 
	public ParkedCar(ParkedCar car2)
	{
		make = car2.make;
		model = car2.model;
		color = car2.color;
		licenseNumber = car2.licenseNumber;
		minutesParked = car2.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;
	}
 
	public String toString()
	{
		String str = "Car Data:" + 
						"\nMake: " + make +
						"\nModel: " + model +
						"\nColor: " + color +
						"\nLicense Number: " + licenseNumber +
						"\nMinutes Parked: " + minutesParked;
		return str;
	}
 
}

public class ParkingMeter {
	private int minutesPurchased;
 
	public ParkingMeter(int m)
	{
		minutesPurchased = m;
 
	}
 
	public int getMinutesPurchased() {
		return minutesPurchased;
	}
 
	public void setMinutesPurchased(int minutesPurchased) {
		this.minutesPurchased = minutesPurchased;
	}
 
}

public class ParkingTicket {
	private ParkedCar car;
	private PoliceOfficer officer;
	private double fine;
	private int minutes;
	public double BASE_FINE = 25.0;
	public double HOURLY_FINE = 10.0;
 
	public ParkingTicket(ParkedCar aCar, PoliceOfficer anOfficer, int min)
	{
		car = new ParkedCar(aCar);
		officer = new PoliceOfficer(anOfficer);
		minutes = min;
 
	}
 
	public ParkingTicket(ParkingTicket ticket2)
	{
		car = ticket2.car;
		officer = ticket2.officer;
		minutes = ticket2.minutes;
 
	}
	//This is where I'm having issues
	public void calculateFine()
	{
		if(ParkedCar.minutesParked - ParkingMeter.minutesPurchased <= 60)
            fine = BASE_FINE;
        else
            fine = BASE_FINE + (HOURLY_FINE * ((ParkedCar.minutesParked - ParkingMeter.minutesPurchased) / 60 ));
 
 
	}
 
 
	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;
	}
 
	public double getBASE_FINE() {
		return BASE_FINE;
	}
 
	public void setBASE_FINE(double bASE_FINE) {
		BASE_FINE = bASE_FINE;
	}
 
	public double getHOURLY_FINE() {
		return HOURLY_FINE;
	}
 
	public void setHOURLY_FINE(double hOURLY_FINE) {
		HOURLY_FINE = hOURLY_FINE;
	}
 
	public String toString()
	{
		String str = "Minutes Parked: " + minutes;
		return str;
	}
 
}

Originally Posted by DanBrown

do you really know why we create getter and setter method.
Please don't mind , but go through basic java tutorials

Access Modifiers

I agree. Understanding the reasoning is extremely important. Just my opinion, but this is a situation where the java tutorials do a very poor job at explaining the reasoning. For example, not once is the word encapsulation used on that tutorial page. Again, just my .02