Thread: Can someone help me with my Computer Science homework :)

This is what my professor send me

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[ATTACH]1975[/ATTACH]

" In this lab you will create a program that computes charges to ship a package with Super Fast Diego
Company. Using Assignment #3 and your Common Classes:

Class ShippingCharges
Attributes:
int packageID;
double weight;
double distance;
double charges = 0.00f;
Customer customerShip;
Customer customerReceive;
Include  public void printInvoice()

Class Customer
Name name;
Address address;
Phone phone;
Example of a ShippingChgDriver
public class ShippingChgDriver
{
public static void main()
{
System.out.println("Enter a package to be shipped");
ShippingCharges package1 = new ShippingCharges();
package1.printInvoice();
} // main()
} // end ShippingChgDriver"

/**
 * Assignment 3
 *
 * Jared Wines
 * CS 111
 */
 
 
 //Class Customer
 
public class CommonClasses
{
 
	Name name;
	Address address;
	Phone phone;
 
 
  			public static void main(String[] args) {
{
			System.out.println("Enter a package to be shipped");
			ShippingCharges package1 = new ShippingCharges();
 
} // main()
} // end ShippingChgDriver
}

/**
 * Assignment 3
 *
 * Jared Wines
 * CS 111
 */
 
 
 //Class ShippingCharges
 
 import java.util.Scanner;
public class Assignment3
{
 
    public static void main(String[] args) {
 
 
    	// Problem 1
 
    	 Scanner keyboard = new Scanner(System.in);
 
    	double weight = 0.0;  
    	double distance = 0.0 ;  
    	double charge = 0.0;  
 
    	System.out.println("Please enter the weight of you package");
    	weight = keyboard.nextDouble();
    	System.out.println("please enter the distance");
    	distance = keyboard.nextDouble();
 
    	int distanceFactor = (int) (distance / 500);
    	System.out.println(distanceFactor);
    	if ( distance % 500 > 0.0)
    	   distanceFactor++;
 
    	System.out.println(distanceFactor);
 
    	if (weight <= 2.0)
    		charge = 1.1 * distanceFactor;
    	else if (weight > 2.0 && weight <= 6.0)
    		charge = 2.2 * distanceFactor ;
    	else if (weight > 6.0 && weight <= 10.0)
    		charge = 3.7 * distanceFactor;
    	else if (weight > 10.0)
    		charge = 4.8 * distanceFactor;
 
 
    	System.out.println("Distance = " + distance + " weight = " + weight + " charges = " + charge);	
 
 
    }//end class
 
}//end main

import java.util.Scanner;
 
public class Phone
{
    String home;
    String cell;
    String work;
    String workExt;
 
    public Phone()
    {
        Scanner inPhone = new Scanner(System.in);
        System.out.println("Enter a home phone number \"area xxx xxxx\" or return for no number");
        home = inPhone.nextLine();
        System.out.println("Enter a cell phone number \"area xxx xxxx\" or return for no number");
        cell = inPhone.nextLine();
        System.out.println("Enter a work phone number \"area xxx xxxx\" or return for no number");
        work = inPhone.nextLine();
        if (work.equals(" "))
        {
             // there is a work extension
        }
        else
        {
            System.out.println("Enter work extension number or return for no number");
            workExt = inPhone.nextLine();
        }
     }
     public Phone(char whatNum, String newNumber)
     {
         if (whatNum == 'H' || whatNum == 'h')
         {
             home = newNumber;
         }
         else if (whatNum == 'C' || whatNum == 'c')
         {
             cell = newNumber;
         }
         else if (whatNum == 'W' || whatNum == 'w')
         {
             work = newNumber;
         }
     }
    public void setHomePhoneNumber(String newNumber)
    {
        home = newNumber;
    }
    public String getHomePhoneNumber()
    {
        return home;
    }
    public void setCellPhoneNumber(String newNumber)
    {
        cell = newNumber;
    }
    public String getCellPhoneNumber()
    {
        return cell;
    }
    public void setWorkPhoneNumber(String newNumber)
    {
        work = newNumber;
    }
    public String getWorkPhoneNumber()
    {
        return work;
    }
    public void setWorkExtPhoneNumber(String newNumber)
    {
        workExt = newNumber;
    }
    public String getWorkExtPhoneNumber()
    {
        return workExt;
    } 
 
}// end class Phone

import java.util.Scanner;
 
public class Address
{
    String street;
    String city;
    String state;
    String zipCode;
 
    public Address()
    {
        Scanner inAddress = new Scanner(System.in);
        System.out.println("Enter street address");
        street = inAddress.nextLine();
        System.out.println("Enter city");
        city = inAddress.nextLine();
        System.out.println("Enter state");
        state = inAddress.nextLine();
        System.out.println("Enter zip code");
        zipCode = inAddress.nextLine();
    }
    public Address(String newStreet, String newCity, String newState, String newZip)
    {
        street = newStreet;
        state = newState;
        city = newCity;
        zipCode = newZip;
    }
    public void setStreet(String newStreet)
    {
        street = newStreet;
    }
    public String getStreet()
    {
        return street;
    }
    public void setCity(String newCity)
    {
        city = newCity;
    }
    public String getCity()
    {
        return city;
    }
    public void setState(String newState)
    {
        state = newState;
    }
    public String getState()
    {
        return state;
    }
    public void setZipCode(String newZip)
    {
        zipCode = newZip;
    }
    public String getZipCode()
    {
        return zipCode;
    }
    public String toString()
    {
 
        return street + " " + city + " " + state + " " + zipCode;
    }
 
 
} // end class Address

import java.util.Scanner;
 
public class Name 
{
  String firstName;
  String lastName;
  String middleName;
 
  // constructors methods
  public Name()
  {
    Scanner keyboard = new Scanner(System.in);
    System.out.println("enter person's firstname middlename lastname");
    firstName = keyboard.next();
    middleName = keyboard.next();
    lastName = keyboard.nextLine();
 
  }
  public Name(String newFirst, String newMiddle, String newLast)
  {
  	firstName = newFirst;
  	middleName = newMiddle;
  	lastName = newLast;
  }
 
  // setters & getters
  public String getFirstName()
  {
  	return firstName;
  }
  public void setFirstName(String newFirst)
  {
  	firstName = newFirst;
  }
  public String getMiddleName()
  {
  	return middleName;
  }
  public void setMiddleName(String newMiddle)
  {
  	middleName = newMiddle;
  }
  public String getLastName()
  {
  	return lastName;
  }
  public void setLastName(String newLast)
  {
  	lastName = newLast;
  }
 
  public String toString()
  {
  	return firstName + " " + middleName + " " + lastName;
  }
 
 
 
  }// end Name class

I dont fully understand what i need to do. Thank you