Electronic telephone book task!

I have a task to do which invovles creating an electronic telephone book, ive jus started using java and havnt got a clue how to code each class, so if any1 could post the coding needed to make each class work i would be most grateful! cheers people!

Below is the task i was set -

Develop a Java application to create and manage an electronic telephone book. The book will contain information about home and overseas friends.

The abstract class Friend will have the following attributes:

name;
email;
tel;

And the following methods:
Friend(); //a constructor that will set up all values to “Unknown”
public void getData(String newName, String newEmail, String newTel)where data is saved in three parallel arrays names[], emails[], telNums[];
public string search(); (10)
public void displayAll();//before sorting
public void displaySorted();

A derived class HomeFriend will extend the base class by adding an attribute:

int areaCode;
and 3 methods:
HomeFriend(); //constructor that sets the area code to 0 as default
public void getAreaCode(int newAreaCode); //get value from user
public String displayAll(); (5)
public void displaySorted();//after sorting (5)

OverseasFriend class will extend the base class by adding an attribute:

int countryCode;
and 3 methods:
OverseasFriend();//constructor that will set default country code to 0
public void getCountryCode(int newCountryCode);
public String displayAll(); (5)
public void displaySorted();//after sorting (5)

The application will also include a datastore to save data.


Discuss any inheritance or use associations as part of your design using UML notations.

Perhaps if you post some of your code, we could help you learn off of that.
We're not going to do your projects for you.