PhoneBook HW Assignment

//-------------------------- Phone -------------------------------

package Cls;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Phone {

    private String phoneNumber;
    private String owner;
    private int lastPayment;
    private final int LAST_PAYMENT = -1;

    public Phone(String phoneNumber, String owner) {
        this.phoneNumber = phoneNumber;
        this.owner = owner;
        this.lastPayment = LAST_PAYMENT;
    }

    public Phone(Scanner sc) throws FileNotFoundException {
        parsePhone(sc.nextLine());
    }

    public Phone(String fileName) throws FileNotFoundException {
        File file = new File(fileName);
        Scanner sc = new Scanner(file);
        this.phoneNumber = sc.next();
        this.owner = sc.next();
        sc.close();
    }

    public String getOwner() {
        return owner;
    }

    public String getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public int getLastPayment() {
        return lastPayment;
    }

    public void setLastPayment(int lastPayment) {
        this.lastPayment = lastPayment;
    }

    public void save(PrintWriter pw) throws FileNotFoundException {
        pw.println(this.toString());
    }

    public void save(String fileName) throws  FileNotFoundException {
        File file = new File(fileName);
        PrintWriter printWriter = new PrintWriter(file);
        printWriter.println(this.toString());
        printWriter.close();
    }

    @Override
    public String toString() {
        return "<" + this.phoneNumber + ">, <" + this.owner + ">, <" + this.lastPayment + ">";
    }

    // A utility method to parse the phone details from a string to the instance arguments
    private void parsePhone(String str) {
        this.phoneNumber = str.substring(str.indexOf('<')+1, str.indexOf('>'));
        this.owner = str.substring(str.indexOf('>')+4, str.lastIndexOf('<')-3);
        this.lastPayment = Integer.parseInt(str.substring(str.lastIndexOf('<')+1, str.lastIndexOf('>')));
    }
}

//----------------------- PhoneBook --------------------------

package Cls;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class PhoneBook {

    //Instance variables
    private String owner;
    private Phone[] phones;
    private int numOfPhones;
    private int counter;

    //Constructors

    public PhoneBook(String owner, int numOfPhones) {
        this.owner = owner;
        this.numOfPhones = numOfPhones;
        counter = 0;
        phones = new Phone[numOfPhones];
    }

    public PhoneBook(String fileName) throws FileNotFoundException {
        File file = new File(fileName);
        Scanner sc = new Scanner(file);
        this.owner = sc.nextLine();
        this.numOfPhones = sc.nextInt();
        phones = new Phone[numOfPhones];
        this.counter = sc.nextInt();
        sc.nextLine();
        for(int i = 0; i < counter; i++) {
            phones[i] = new Phone(sc);
        }
        sc.close();
    }

    // Instance methods

    public void add(Phone phone) {
        phones[counter++] = phone;
    }

    public void save(String filename) throws FileNotFoundException {
        File file = new File(filename);
        PrintWriter printWriter = new PrintWriter(file);
        if(counter > 0) {
            printWriter.println(this.owner);
            printWriter.println(this.numOfPhones);
            printWriter.println(this.counter);
            for(int i = 0; i < counter; i++) {
                phones[i].save(printWriter);
            }
        }
        printWriter.close();
    }

    public void printPhonebook() {
        System.out.println("Owner --> " + this.owner);
        System.out.println("Max number of phone numbers --> " + this.numOfPhones);
        System.out.println("Current number of phones --> " + this.counter);
        System.out.println("\nPhones details:\n------------");
        for(int i = 0; i < this.counter; i++) {
            System.out.println(phones[i].toString());
        }
    }
}

//----------------------------- Tester for both parts (convert the part you want to ignore to notes) ----

package Tester;

import Cls.Phone;
import Cls.PhoneBook;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Tester {

    public static void main(String[] args) {
        //Test part 1
        /*
        Phone phone1 = new Phone("055-1234567", "Eran");
        Phone phone2 = new Phone("077-7654321", "Ofri");
        Phone phone3 = new Phone("052-5555555", "Noa");
        String fileName = "PhoneBook.phones";
        try {
            save(phone1, phone2, phone3, fileName);
            // Assigning phones 1-3 to phones 4-6
            File file = new File(fileName);
            Scanner sc = new Scanner(file);
            Phone ph4 = new Phone(sc);
            Phone ph5 = new Phone(sc);
            Phone ph6 = new Phone(sc);
            //Check phones 4-6 initialization
            System.out.println(ph4.toString());
            System.out.println(ph5.toString());
            System.out.println(ph6.toString());
            sc.close();
        } catch(FileNotFoundException fnfe) {
            System.out.println(fnfe.toString());
        }
    }

    private static void save(Phone ph1, Phone ph2, Phone ph3, String fName) throws FileNotFoundException {
        File file = new File(fName);
        PrintWriter printWriter = new PrintWriter(file);
        ph1.save(printWriter);
        ph2.save(printWriter);
        ph3.save(printWriter);
        printWriter.close();
    }
    */
        //test part 2
        try {
            String fileName = "phonebook.phones";
            //section a
            PhoneBook phoneBook = new PhoneBook("Eran", 5);
            //section b
            phoneBook.add(new Phone("057-1234567", "Israel"));
            phoneBook.add(new Phone("056-1111111", "Shalom"));
            phoneBook.add(new Phone("054-8778787", "Yossi"));
            //section c
            phoneBook.save(fileName);
            //section d
            PhoneBook pb = new PhoneBook(fileName);
            //section e
            checkCorrectness(pb);

        } catch (FileNotFoundException fnfe) {
            System.out.println(fnfe.toString());
        }
    }

    private static void checkCorrectness(PhoneBook phBook) {
        phBook.printPhonebook();
    }
}