Person.java

package tutorial.java;

import java.io.Serializable;
/*
* The prerequsition of making a serializable class
*
* 1. implements interface Serializable to all classes
* 2. the class provides a global constant serialVersionUID
* 3. not only Person needs interface as Serializable, each property should be serializable too (by default,
*       the basic data types are also serializable)
*
*
*
*
* */
public class Person implements Serializable {
    private static final long serialVersionUID = 4296251054416L;
    private String name;
    private int age;
    private int id;
    private Account acct;

    public Person(String name, int age, int id) {
        this.name = name;
        this.age = age;
        this.id = id;
    }

    public Person(String name, int age, int id, Account acct) {
        this.name = name;
        this.age = age;
        this.id = id;
        this.acct = acct;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", id=" + id +
                ", acct=" + acct +
                '}';
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

class Account implements Serializable{
    private static final long serialVersionUID = 42951054416L;

    private double balance;

    public Account(double balance) {
        this.balance = balance;
    }

    @Override
    public String toString() {
        return "Account{" +
                "balance=" + balance +
                '}';
    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        this.balance = balance;
    }
}