1. Class Company:
Code:
package phonebookoscar;
public class Company implements Item {
private String name;
private String phone;
private String address;
private String email;
private int age;
public Company() {
}
public Company(String name, String phone, String address, String email, int age) {
this.name = name;
this.phone = phone;
this.address = address;
this.email = email;
this.age = age;
}
public String getName() {
return name;
}
public String getPhone() {
return phone;
}
public String getAddress(){
return address;
}
public String getEmail(){
return email;
}
public int getAge(){
return age;
}
public String getSurname() {
return "";
}
Code:
package phonebookoscar;
public class ContactExtended extends Contact implements ExtendedItem{
private String email = null;
private int age = 0;
public ContactExtended() {
super();
}
public ContactExtended(String name, String surname, String phone, int age, String email){
super(name, surname, phone);
this.email = email;
this.age = age;
}
}
Code:
Package phonebookoscar;
public interface Item {
public String getName();
public String getSurname();
public String getPhone();
}
Code:
Package phonebookoscar;
public class Contact implements Item {
private String name = null;
private String surname = null;
private String phone = null;
private String address = null;
private String email = null;
private int age = 0;
public Contact() {};
public Contact(String name, String surname, String phone, String address, String email, int age) {
this.name = name;
this.surname = surname;
this.phone = phone;
this.address = address;
this.email = email;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress(){
return address;
}
public void setAddress(String address){
this.address = address;
}
public String getEmail(){
return email;
}
public void setEmail(String email){
this.email = email;
}
public int getAge(){
return age;
}
public void setAge(int age){
this.age = age;
}
}
Code:
package phonebookoscar;
public interface ExtendedItem extends Item{
public String getAddress();
public String getEmail();
public int getAge();
}
Code:
Package phonebookoscar;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
public class Keyboard {
private static final BufferedReader keyboard =
new BufferedReader(new InputStreamReader(System.in));
public static String readString() {
String line = null;
try {
line = keyboard.readLine();
}
catch(IOException e) {
show("Error reading a string of characters.");
}
return line;
}
public static int readInteger() {
int integer = 0;
String line = readString();
if(line != null) integer = Integer.parseInt(line);
return integer;
}
public static float readFloat() {
float real = 0.0f;
String line = readString();
if(line != null) real = Float.parseFloat(line);
return real;
}
public static double readDouble() {
double real = 0.0;
String line = readString();
if(line != null) real = Double.parseDouble(line);
return real;
}
private static void show(String line) {
System.err.println(line);
}
}
Code:
package phonebookoscar;
public class PhoneBook {
private static final int SIZE = 100;
private int nContacts = 0;
private Item contacts[] = new Item[SIZE];
public PhoneBook() {}
public Item getContactAt(int position) {
Item contact = new Contact();
if(position >= 0 && position < nContacts)
contact = contacts[position];
return contact;
}
public int getNContacts() {
return nContacts;
}
public Item searchForName(String name) {
Item contact = null;
int position = 0;
while((contact == null) && position < nContacts) {
if(contacts[position].getName().equals(name))
contact = contacts[position];
else position++;
}
if(contact == null) contact = new Contact();
return contact;
}
public void addContact(Item contact) {
if(nContacts < SIZE)
contacts[nContacts++] = contact;
}
}
Code:
package phonebookoscar;
public class Main {
private static final int EXIT = 0;
private static final int ADD = 1;
private static final int LIST = 2;
private static final int SEARCH = 3;
private static final int ADD_NEW_COMPANY = 4;
private static final int SEARCH_ADDRESS = 5;
private static final int SEARCH_EMAIL = 6;
private static final int SEARCH_AGE = 7;
private PhoneBook phoneBook = new PhoneBook();
public void menu() {
System.out.println("");
System.out.println("1. Add a new contact to the phone book.");
System.out.println("2. List all contacts in the phone book.");
System.out.println("3. Search a contact for name.");
System.out.println("4. Add a new company");
System.out.println("5. Searh a contact for address.");
System.out.println("6. Search a contact for email.");
System.out.println("7. Seach a contact for age.");
System.out.println("0. Exit.");
System.out.print("Choose an option:");
}
public void doAdd() {
System.out.print("Name: ");
String name = Keyboard.readString();
System.out.print("Surname: ");
String surname = Keyboard.readString();
System.out.print("Phone number: ");
String phone = Keyboard.readString();
System.out.print("Address:");
String address = Keyboard.readString();
System.out.print("Email:");
String email = Keyboard.readString();
System.out.print("Age:");
String age = Keyboard.readString();
phoneBook.addContact(new Contact(name, surname, phone,address,email,age));
}
public void doAddNewCompany() {
System.out.print("Name: ");
String name = Keyboard.readString();
System.out.print("Phone number: ");
String phone = Keyboard.readString();
System.out.print("Address");
String address = Keyboard.readString();
System.out.print("Email");
String email = Keyboard.readString();
System.out.print("Age");
String age = Keyboard.readString();
phoneBook.addContact(new Company(name, phone, address, email, age));
}
public void doList() {
int nContacts = phoneBook.getNContacts();
Item contact;
for(int i = 0; i < nContacts; i++) {
contact = phoneBook.getContactAt(i);
System.out.println("Name: " + contact.getName());
System.out.println("Surname: " + contact.getSurname());
System.out.println("Phone: " + contact.getPhone());
System.out.println("Address: " + contact.getAddress());
System.out.println("Email: " + contact.getEmail());
System.out.println("Age: " + contact.getAge());
}
}
public void doSearch() {
System.out.print("Name to search for: ");
String name = Keyboard.readString();
Item contact = phoneBook.searchForName(name);
System.out.println("Name: " + contact.getName());
System.out.println("Surname: " + contact.getSurname());
System.out.println("Phone: " + contact.getPhone());
System.out.println("Address: " + contact.getAddress());
System.out.println("Email: " + contact.getEmail());
System.out.println("Age: " + contact.getAge());
}
public void doAction(int action) {
switch(action) {
case ADD :
doAdd();
break;
case LIST :
doList();
break;
case SEARCH :
doSearch();
break;
case ADD_NEW_COMPANY:
doAddNewCompany();
break;
case EXIT :
System.out.println("Bye!!");
break;
default :
System.out.println("The option is not valid.");
break;
}
}
public void go() {
int option;
do {
menu();
option = Keyboard.readInteger();
doAction(option);
}while(option != EXIT);
}
public static void main(String args[]) {
Main main = new Main();
main.go();
}
}