Creating an ISP Bill for Customer Problem, What did i do wrong?

Question

Ok so the point of this program is to create a bill for customers selecting different packages for this ISP. Now i have done all the code, made the methods and what now, but there is a problem, in my main method which tests the methods in my class, the object does not get passed through the method and my toString method does not return the output. i will post the code below, did i do anything wrong?
this is the code for the class:
public class Customer extends appProg
    //these are the base set of hours for each package
    public final double BASE_HOURS_A= 10.00;
    public final double BASE_HOURS_B= 20.00;
    public final double BASE_HOURS_C= 9999999999999999999999999999999999999999.00;
    //these are the base costs for each package
    public final double BASE_COST_A= 9.95;
    public final double BASE_COST_B= 14.95;
    public final double BASE_COST_C= 19.95;
    //these are the additional costs per hour for the packages
    public final double PER_HOUR_COST_A= 2.00;
    public final double PER_HOUR_COST_B= 1.00;
    public final double PER_HOUR_COST_C= 0.00;
    private double totalCharges;
    private char packageType;
    private double hoursUsed;
    private String customerName;
    // Below are the Constructors for this class
    // The constructors will help instantiate the object
    public Customer()
    {   totalCharges=0;
        packageType='b';
        hoursUsed=0.0;
        customerName="";
    public Customer(char packageType, double hoursUsed, String customerName)
        this.packageType=packageType;
        this.hoursUsed=hoursUsed;
        this.customerName=customerName;
    // The following are the accessor methods
    // the getPackage method returns the package type
    public char getPackage()
        return packageType;
    // the getHoursUsed() returns the hours used of the customer
    public double getHoursUsed()
        return hoursUsed;
    // the getCustomerName() returns the name of the customer
    public String getCustomerName()
        return customerName;
    //the totalCharges methods calculates the total charges
    public double totalCharges()
        if(packageType=='A' && hoursUsed>10.00)
                totalCharges=((hoursUsed-10)*PER_HOUR_COST_A)+(hoursUsed*BASE_COST_A);
        if(packageType=='A' && hoursUsed<=10.00)
            totalCharges=(hoursUsed*BASE_COST_A);
        if(packageType=='B' && hoursUsed>20.00)
                totalCharges=((hoursUsed-20)*PER_HOUR_COST_B)+(hoursUsed*BASE_COST_B);
        if(packageType=='B' && hoursUsed<=20.00)
            totalCharges=(hoursUsed*BASE_COST_B);
        if(packageType=='C')
            totalCharges=(BASE_COST_A);
        return totalCharges;
    //The following are the mutator methods
    //the setPackage method will set the package type for the customer
    public void setPackage(char packageType)
        this.packageType=packageType;
    //the setHours method will set the amount of hours used for that customer
    public void setHours(double hoursUsed)
        this.hoursUsed=hoursUsed;
    //the setCustomerName method will set the name for the customer
    public void setCustomerName(String customerName)
        this.customerName=customerName;
   //the following are input and output methods
   public String toString()
       return "You have used a total of "+hoursUsed+" hours and your total cost is "+totalCharges+"";
} // end class Customerand this is the code for the appProgram that goes with it:
public class appProg
    //************* MAIN METHOD ******************************************
    public static void main(String[] args)
          String packageT;
          char packagetype;
          double hoursUsed;
          String name;
          Scanner keyboard = new Scanner(System.in);
          System.out.println("This program was written by Ashkan Gholami for CSC15 with JONES.");
          System.out.println("");
          System.out.print("Please enter the Customers name: ");
          name=keyboard.nextLine();
          System.out.print("Please enter the package type: ");
          packageT=keyboard.nextLine();
          packagetype=packageT.charAt(0);
          System.out.print("Please enter the hours used: ");
          hoursUsed=keyboard.nextDouble();
          keyboard.nextLine();
          switch(packagetype)
             case 'A':
                System.out.println(""+name+" has chosen package A.");
                break;
             case 'B':
                System.out.println(""+name+" has chosen package B.");
                break;
             case 'C':
                System.out.println(""+name+" has chosen package C.");
                break;
             case 'a':
                System.out.println(""+name+" has chosen package A.");
                break;
             case 'b':
                System.out.println(""+name+" has chosen package B.");
                break;
             case 'c':
                System.out.println(""+name+" has chosen package C.");
                break;
             default:
                System.out.println("That is an invalid package type!");
                break;
          Customer customer1= new Customer(packagetype,hoursUsed,name);
          customer1.totalCharges();
          customer1.toString();
    }      

Answer 1

in my main method which tests the methods in my class,
the object does not get passed through the method That statement makes no sense. You can pass objects to methods. However, you do not pass objects "through methods". In any case, neither your totalCharges() method nor your toString() method is defined to accept any parameters--much less an object as a parameter.
and my toString method does not return the outputHow do you know that? Your toString() method is defined to return a String. Where in your program do you attempt to display the String that is returned?
did i do anything wrong?If you call a method on an object, and the method returns something, you need to assign the returned value to a variable--otherwise the returned value will disappear into the ether. Subsequently, if you want to display the returned value, you have to take steps to do that as well.
It sounds like you need to revisit a simple "Hello World" program and play around with it a little bit.