How do I get the methods to respond to my main program?

Question

I have created 3 classes,where class Kunde is my base class and class PudsPrAreal and PudsPrTid are derived classes from class Kunde.
All my classes went through my compiler without error, but my main program is not able to read the methods from my classes.How do I fix that??
my base class:
navn = nyNavn;
adresse = nyAdresse;
rabat = nyRabat;
public void readInput()
System.out.println("Indtast kundens navn:");
navn = SavitchIn.readLine();
System.out.println("Indtast kundens adresse:");
adresse = SavitchIn.readLine();
System.out.println("Modtager " + navn + " en form for rabat?");
System.out.println("(j/n):");
char answer = SavitchIn.readNonwhiteChar();
if (answer == 'j'||answer == 'J')
System.out.println("Indtast den procentsats som " + navn + " modtager:");
rabat = SavitchIn.readLineDouble();
public void writeOutput()
System.out.println("Navn: " + navn);
System.out.println("Adresse: " + adresse);
if (rabat > 0)
System.out.println("Rabat: " + rabat);
public Kunde()
navn = "no record";
adresse = "no record";
rabat = 0;
public String getNavn()
return navn;
public String getAdresse()
return adresse;
public double getRabat()
return rabat;
derived class # 1:
public class PudsPrAreal extends Kunde
private double areal; //i kvadratmeter
private String kunde;
private String pudsningsdato;
private double kvadratmeterPris;
private double pris;
public PudsPrAreal()
super();
kunde = "no record";
pudsningsdato = "no record";
kvadratmeterPris = 0;
pris = 0;
areal = 0;
public PudsPrAreal(String initialKunde, String initialPudsningsdato, double initialAreal,
String initialNavn, String initialAdresse, double initialRabat)
super(initialNavn, initialAdresse, initialRabat);
set(initialKunde, initialPudsningsdato, initialAreal);
public void set(String nyKunde, String nyPudsningsdato, double nyAreal)
kunde = nyKunde;
pudsningsdato = nyPudsningsdato;
areal = nyAreal;
public void readInputPrAreal()
System.out.println("Indtast datoen hvor vinduespudsningen er blevet foretaget:");
pudsningsdato = SavitchIn.readLine();
System.out.println("Hvor mange kvadratmeter skal der afregnes for:");
areal = SavitchIn.readLineDouble();
public double pris(double areal)
double pris;
double kvadratmeterPris;
if (areal > 100)
kvadratmeterPris = 7.0;
else if (areal >= 500)
kvadratmeterPris = 6.5;
else
kvadratmeterPris = 6.0;
double prisEks = areal * kvadratmeterPris; //pris eksclusiv rabat
pris = prisEks * ((100 - getRabat())/100); //pris inclusiv rabat
return pris;
public void writeOutputPrAreal()
System.out.println("Dato for vinduespudsning: " + pudsningsdato);
System.out.println("Navn: " + getNavn());
System.out.println("Adresse: " + getAdresse());
System.out.println("Prisberegningsgrundlag: pr kvadratmeter");
System.out.println("Antal kvadratmeter: " + areal);
System.out.println("Pris pr kvadratmeter: " + kvadratmeterPris + " kr.");
if (getRabat() > 0)
System.out.println("Rabat: " + getRabat());
System.out.println("Pris for vinduespudsningen: " + pris + "kr.");
else
System.out.println("Pris for vinduespudsningen: " + pris + "kr.");
public String getkunde()
return kunde;
public String getPudsningsdato()
return pudsningsdato;
public double getAreal()
return areal;
derived class # 2:
public class PudsPrTime extends Kunde
private int minuter; //tid for vinduespudsningen angives i minuter
private double tid; //tid for vinduespudsningen i timer
private String kunde;
private String pudsningsdato;
private double pris;
public PudsPrTime(String initialKunde, String initialPudsningsdato, int initialMinuter,
String initialNavn, String initialAdresse, double initialRabat)
super(initialNavn, initialAdresse, initialRabat);
set(initialKunde, initialPudsningsdato, initialMinuter);
public void set(String nyKunde, String nyPudsningsdato, int nyMinuter)
kunde = nyKunde;
pudsningsdato = nyPudsningsdato;
minuter = nyMinuter;
public void readInputPrTime()
System.out.println("Indtast datoen hvor vinduespudsningen er blevet foretaget:");
pudsningsdato = SavitchIn.readLine();
System.out.println("Hvor mange minuter skal der afregnes for:");
minuter = SavitchIn.readLineInt();
public double pris(int minuter)
int kvarter;
int minuterTilOvers;
double pris;
kvarter = minuter / 15;
minuterTilOvers = minuter % 15;
if (minuterTilOvers > 0)
kvarter++;
tid = kvarter * 0.25;
double prisEks = tid * 375; //pris eksclusiv rabat
pris = prisEks * ((100 - getRabat())/100);
return pris;
public void writeOutputPrTime()
System.out.println("Dato for vinduespudsning: " + pudsningsdato);
System.out.println("Navn: " + getNavn());
System.out.println("Adresse: " + getAdresse());
System.out.println("Prisberegningsgrundlag: pr time");
System.out.println("Antal timer: " + tid);
System.out.println("Pris pr time: 375 kr.");
System.out.println("Der afregnes pr p�begyndt 15 minuter.");
if (getRabat() > 0)
System.out.println("Rabat: " + getRabat());
System.out.println("Pris for vinduespudsningen: " + pris + "kr.");
else
System.out.println("Pris for vinduespudsningen: " + pris + "kr.");
public String getKunde()
return kunde;
public String getPudsningsdato()
return pudsningsdato;
public int getMinuter()
return minuter;
my main program:
public class Glasklart
public static void main(String[] args)
Glasklart kunde = new Glasklart();
System.out.println("Indtast datoen for idag:");
String dato = SavitchIn.readLine();
kunde.readInput();
System.out.println("Hvad er prisberegningsgrundlaget?");
System.out.println("Skriv 'k' for pr kvadratmeter eller 't' for pr time:");
char svar = SavitchIn.readNonwhiteChar();
if (svar == 'k'||svar == 'K')
kunde.readInputPrAreal();
System.out.println("Afregningsdato: " + dato);
kunde.writeOutputPrAreal();
else if (svar == 't'||svar == 'T')
kunde.readInputPrTime();
System.out.println("Afregningsdato: " + dato);
kunde.writeOutputPrTime();
else
System.out.println("Forkert svar. Pr�v igen.");
System.out.println("Skriv 'k' for pr kvadratmeter eller 't' for pr time:");
svar = SavitchIn.readNonwhiteChar();
error message for my main program:
"Glasklart.java": Error #: 300 : method readInput() not found in class Glasklart at line 10, column 9
"Glasklart.java": Error #: 300 : method readInputPrAreal() not found in class Glasklart at line 16, column 13
"Glasklart.java": Error #: 300 : method writeOutputPrAreal() not found in class Glasklart at line 18, column 13
"Glasklart.java": Error #: 300 : method readInputPrTime() not found in class Glasklart at line 22, column 13
"Glasklart.java": Error #: 300 : method writeOutputPrTime() not found in class Glasklart at line 24, column 13

Answer 1

The problem is that your main class isn't even trying to read the methods in your other classes. In your main() method in Glasklart.java, you do this:
Glasklart kunde = new Glasklart();
System.out.println("Indtast datoen for idag:");
String dato = SavitchIn.readLine();
kunde.readInput();But you didn't define readInput() in Glasklart, you defined it in your "base class" which you didn't quote enough of us to know the name for sure, but I presume is called Kunde.java.
But I also see that you named the variable "kunde". It looks like maybe you're confusing the names of classes with the names of variables that happen to hold objects instantiated from those classes.
If I define classes:
public class Dog {
public class Cat {
}and later do this:
  Cat dog = new Cat();The methods defined in Dog cannot be invoked from from "dog", because "dog" is really a Cat. Just because you called it "dog", it doesn't necesarily mean it's an instance of Dog.