Проектирование и разработки библиотек классов

Цель работы: приобрести навыки проектирования и разработки библиотек классов; изучить и приобрести навыки использования механизма сериализации объектов.

Ход работы

1. Исходный код

package com.company;

import java.io.*;

import java.util.ArrayList;

public class Main {

static SaverReader sr = new SaverReader();

public static void main(String[] args) {

ArrayList<Bank> bb = new ArrayList<Bank>();

Bank bank = new Bank("My bank");

Owner owner = new Owner("N1", "S1", "0");

Owner owner2 = new Owner("N2", "S2", "1");

bank.register(owner);

bank.register(owner2);

BankAccount acc1 = bank.openAccount(owner);

BankAccount acc2 = bank.openAccount(owner2);

try {

acc1.deposit(25);

acc1.transfer(15, acc2);

acc2.withdraw(30);

} catch (Exception e) {

System.out.println(e.getMessage());

}

String filename = "notes.dat";

try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(filename))) {

oos.writeObject(bank);

} catch (Exception e) {

System.out.println(e.getMessage());

}

System.out.println(bank.info());

Bank bank2 = new Bank("");

try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename))) {

bank2 = (Bank) ois.readObject();

} catch (Exception ex) {

System.out.println(ex.getMessage());

}

System.out.println(bank2.info());

sr.addBanks(bank);

sr.addAccounts(acc1, acc2);

sr.addOwners(owner, owner2);

sr.save();

System.out.println("\nAuto load: \n");

sr.load();

System.out.println(sr.banks.get(0).info());

}

}

package com.company;

import java.io.Serializable;

import java.util.ArrayList;

public class Bank implements Serializable {

String name;

ArrayList<Owner> clients = new ArrayList<Owner>();

public Bank(String name) {

this.name = name;

};

public void register(Owner owner){

if(!clients.contains(owner)){

clients.add(owner);

}

}

public BankAccount openAccount(Owner owner){

if(clients == null || !clients.contains(owner)){

System.out.println("Registering user...");

this.register(owner);

}

BankAccount account = new BankAccount(owner);

owner.addAccount(account);

return account;

}

public String info(){

StringBuilder msg = new StringBuilder();

msg.append(name);

msg.append('\n');

for(Owner owner: clients){

msg.append('\t');

msg.append(owner.info());

msg.append(":\n");

for(BankAccount account: owner.getAccounts()){

msg.append("\t\t");

msg.append(account.info());

msg.append('\n');

}

}

return msg.toString();

}

}

package com.company;

import java.io.Serializable;

import java.util.ArrayList;

public class Owner implements Serializable