7 files changed, 434 insertions, 0 deletions
diff --git a/src/com/mavlon/finances/Country.java b/src/com/mavlon/finances/Country.java
new file mode 100644
index 0000000..eef2a31
--- /dev/null
+++ b/src/com/mavlon/finances/Country.java
@@ -0,0 +1,40 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Country implements Serializable {
+    private double stateTaxRate;
+    private double federalTaxRate;
+
+    public Country() {
+    }
+
+    public Country(double stateTaxRate, double federalTaxRate) {
+        this.stateTaxRate = stateTaxRate;
+        this.federalTaxRate = federalTaxRate;
+    }
+
+    public double getStateTaxRate() {
+        return stateTaxRate;
+    }
+
+    public void setStateTaxRate(double stateTaxRate) {
+        this.stateTaxRate = stateTaxRate;
+    }
+
+    public double getFederalTaxRate() {
+        return federalTaxRate;
+    }
+
+    public void setFederalTaxRate(double federalTaxRate) {
+        this.federalTaxRate = federalTaxRate;
+    }
+
+    @Override
+    public String toString() {
+        return "Country" +
+                "\nstate tax rate = " + stateTaxRate +
+                "\nfederal tax rate = " + federalTaxRate +
+                '\n';
+    }
+}
diff --git a/src/com/mavlon/finances/Item.java b/src/com/mavlon/finances/Item.java
new file mode 100644
index 0000000..62794aa
--- /dev/null
+++ b/src/com/mavlon/finances/Item.java
@@ -0,0 +1,48 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Item implements Serializable {
+    private String name;
+    private double cost;
+
+    public Item() {
+    }
+
+    public Item(String name) {
+        this.name = name;
+    }
+
+    public Item(double cost) {
+        this.cost = cost;
+    }
+
+    public Item(String name, double cost) {
+        this.name = name;
+        this.cost = cost;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getCost() {
+        return cost;
+    }
+
+    public void setCost(double cost) {
+        this.cost = cost;
+    }
+
+    @Override
+    public String toString() {
+        return "Item" +
+                "\nname = '" + name + '\'' +
+                "\ncost = " + cost +
+                '\n';
+    }
+}
diff --git a/src/com/mavlon/finances/Job.java b/src/com/mavlon/finances/Job.java
new file mode 100644
index 0000000..11a7797
--- /dev/null
+++ b/src/com/mavlon/finances/Job.java
@@ -0,0 +1,66 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Job implements Serializable {
+    private String name;
+    private double hoursPerWeek;
+    private double hourlyPayRate;
+
+    public Job() {
+    }
+
+    public Job(String name) {
+        this.name = name;
+    }
+
+    public Job(String name, int hoursPerWeek) {
+        this.name = name;
+        this.hoursPerWeek = hoursPerWeek;
+    }
+
+    public Job(String name, int hoursPerWeek, int hourlyPayRate) {
+        this.name = name;
+        this.hoursPerWeek = hoursPerWeek;
+        this.hourlyPayRate = hourlyPayRate;
+    }
+
+    public Job(String name, int hoursPerWeek, int hourlyPayRate, int monthsToWork) {
+        this.name = name;
+        this.hoursPerWeek = hoursPerWeek;
+        this.hourlyPayRate = hourlyPayRate;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getHoursPerWeek() {
+        return hoursPerWeek;
+    }
+
+    public void setHoursPerWeek(double hoursPerWeek) {
+        this.hoursPerWeek = hoursPerWeek;
+    }
+
+    public double getHourlyPayRate() {
+        return hourlyPayRate;
+    }
+
+    public void setHourlyPayRate(double hourlyPayRate) {
+        this.hourlyPayRate = hourlyPayRate;
+    }
+
+    @Override
+    public String toString() {
+        return "Job" +
+                "\nname = '" + name + '\'' +
+                "\nhours per week = " + hoursPerWeek +
+                "\nhourly pay rate = " + hourlyPayRate +
+                '\n';
+    }
+}
diff --git a/src/com/mavlon/finances/Main.java b/src/com/mavlon/finances/Main.java
new file mode 100644
index 0000000..a4dc62e
--- /dev/null
+++ b/src/com/mavlon/finances/Main.java
@@ -0,0 +1,170 @@
+package com.mavlon.finances;
+
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class Main {
+    private final static BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
+
+    public static void main(String[] args) {
+        Person person = new Person();
+        int choice;
+
+        if (Files.exists(Path.of("person"))) {
+            try (ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("person"))) {
+                person = (Person) objectInputStream.readObject();
+            } catch (IOException | ClassNotFoundException ioException) {
+                ioException.printStackTrace();
+            }
+        } else {
+            System.out.println("Take a short survey:");
+            System.out.println();
+            setPersonsInformationAboutWallet(person);
+            System.out.println();
+            setPersonsInformationAboutCountry(person);
+            System.out.println();
+            setPersonsInformationAboutJob(person);
+            System.out.println();
+            setPersonsInformationAboutDreamItem(person);
+            System.out.println();
+        }
+
+        do {
+            System.out.println("""
+                Menu:
+                1) Wallet info
+                11) Put money to wallet
+                12) Take money from wallet
+                2) Job info
+                21) I have worked a month
+                22) Change job
+                3) Dream item info
+                31) When I will be able to buy?
+                32) Change dream item
+                33) Change dream item cost
+                4) Country info
+                41) Change country
+                5) Statistics
+                6) Save and exit
+                """);
+            try {
+                System.out.print("Enter number: ");
+                choice = Integer.parseInt(bufferedReader.readLine());
+                System.out.print("\n");
+            } catch (IOException ioException) {
+                choice = -1;
+            }
+            switch (choice) {
+                case 1 -> System.out.println(person.wallet);
+                case 11 -> {
+                    System.out.print("Enter how much money put: ");
+                    try {
+                        person.wallet.put(Double.parseDouble(bufferedReader.readLine()));
+                    } catch (IOException ioException) {
+                        System.out.println("Invalid number. Try again.");
+                    }
+                }
+                case 12 -> {
+                    double money;
+
+                    System.out.print("Enter how much money take: ");
+                    try {
+                        money = Double.parseDouble(bufferedReader.readLine());
+                        person.wallet.take(money);
+                        person.statistics.addExpenses(money);
+                    } catch (IOException ioException) {
+                        System.out.println("Invalid number. Try again.");
+                    }
+                }
+                case 2 -> System.out.println(person.job);
+                case 21 -> person.wallet.put(person.statistics.getMonthlyNetSalary());
+                case 22 -> setPersonsInformationAboutJob(person);
+                case 3 -> System.out.println(person.dreamItem);
+                case 31 -> System.out.println(person.wallet.getMoney() > person.dreamItem.getCost() ? "Congratulations! You already can buy your dream item!"
+                            : "You have to work " + (int) Math.ceil((person.dreamItem.getCost() - person.wallet.getMoney()) / person.statistics.getMonthlyNetSalary()) + " months.");
+                case 32 -> setPersonsInformationAboutDreamItem(person);
+                case 33 -> {
+                    System.out.print("How much your dream item costs? ");
+                    try {
+                        person.dreamItem.setCost(Double.parseDouble(bufferedReader.readLine()));
+                    } catch (IOException ioException) {
+                        System.out.println("Invalid number. Try again.");
+                    }
+                }
+                case 4 -> System.out.println(person.country);
+                case 41 -> setPersonsInformationAboutCountry(person);
+                case 5 -> System.out.println(person.statistics);
+                case 6 -> {
+                    try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("person"))) {
+                        objectOutputStream.writeObject(person);
+                    } catch (IOException ioException) {
+                        ioException.printStackTrace();
+                    }
+                    System.out.println("Good bye!");
+                }
+                default -> System.out.println("Incorrect input. Try again.");
+            }
+        } while (choice != 6);
+    }
+
+    private static void setPersonsInformationAboutWallet(Person person) {
+        try {
+            System.out.print("How much money do you have? ");
+            person.wallet.setMoney(Double.parseDouble(bufferedReader.readLine()));
+        } catch (IOException ioException) {
+            System.out.println("Incorrect input. Try again.");
+            setPersonsInformationAboutWallet(person);
+        }
+    }
+
+    private static void setPersonsInformationAboutCountry(Person person) {
+        try {
+            System.out.print("How much is state tax rate in your country? ");
+            person.country.setStateTaxRate(Double.parseDouble(bufferedReader.readLine()));
+            System.out.print("How much is federal tax rate in your country? ");
+            person.country.setFederalTaxRate(Double.parseDouble(bufferedReader.readLine()));
+            setPersonsInformationAboutStatistics(person);
+        } catch (IOException ioException) {
+            System.out.println("Incorrect input. Try again.");
+            setPersonsInformationAboutCountry(person);
+        }
+    }
+
+    private static void setPersonsInformationAboutJob(Person person) {
+        try {
+            System.out.print("What is your job? ");
+            person.job.setName(bufferedReader.readLine());
+            System.out.print("How many hours do you work per week? ");
+            person.job.setHoursPerWeek(Double.parseDouble(bufferedReader.readLine()));
+            System.out.print("How much is your hourly pay? ");
+            person.job.setHourlyPayRate(Double.parseDouble(bufferedReader.readLine()));
+            setPersonsInformationAboutStatistics(person);
+        } catch (IOException ioException) {
+            System.out.println("Incorrect input. Try again.");
+            setPersonsInformationAboutJob(person);
+        }
+    }
+
+    private static void setPersonsInformationAboutDreamItem(Person person) {
+        try {
+            System.out.print("What is your dream item? ");
+            person.dreamItem.setName(bufferedReader.readLine());
+            System.out.print("How much your dream item costs? ");
+            person.dreamItem.setCost(Double.parseDouble(bufferedReader.readLine()));
+        } catch (IOException ioException) {
+            System.out.println("Incorrect input. Try again.");
+            setPersonsInformationAboutDreamItem(person);
+        }
+    }
+
+    private static void setPersonsInformationAboutStatistics(Person person) {
+        double monthlyGrossSalary = person.job.getHourlyPayRate() * person.job.getHoursPerWeek() * 4;
+        double monthlyTaxes = monthlyGrossSalary * (person.country.getStateTaxRate() + person.country.getFederalTaxRate()) / 100;
+        double monthlyNetSalary = monthlyGrossSalary - monthlyTaxes;
+
+        person.statistics.setMonthlyGrossSalary(monthlyGrossSalary);
+        person.statistics.setMonthlyTaxes(monthlyTaxes);
+        person.statistics.setMonthlyNetSalary(monthlyNetSalary);
+    }
+}
diff --git a/src/com/mavlon/finances/Person.java b/src/com/mavlon/finances/Person.java
new file mode 100644
index 0000000..8f21609
--- /dev/null
+++ b/src/com/mavlon/finances/Person.java
@@ -0,0 +1,14 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Person implements Serializable {
+    public final Wallet wallet = new Wallet();
+    public final Job job = new Job();
+    public final Item dreamItem = new Item();
+    public final Country country = new Country();
+    public final Statistics statistics = new Statistics();
+
+    public Person() {
+    }
+}
diff --git a/src/com/mavlon/finances/Statistics.java b/src/com/mavlon/finances/Statistics.java
new file mode 100644
index 0000000..edd2515
--- /dev/null
+++ b/src/com/mavlon/finances/Statistics.java
@@ -0,0 +1,56 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Statistics implements Serializable {
+    private double monthlyGrossSalary;
+    private double monthlyTaxes;
+    private double monthlyNetSalary;
+    private double totalExpenses;
+
+    public void addExpenses(double expenses) {
+        totalExpenses += expenses;
+    }
+
+    public double getMonthlyGrossSalary() {
+        return monthlyGrossSalary;
+    }
+
+    public void setMonthlyGrossSalary(double monthlyGrossSalary) {
+        this.monthlyGrossSalary = monthlyGrossSalary;
+    }
+
+    public double getMonthlyTaxes() {
+        return monthlyTaxes;
+    }
+
+    public void setMonthlyTaxes(double monthlyTaxes) {
+        this.monthlyTaxes = monthlyTaxes;
+    }
+
+    public double getMonthlyNetSalary() {
+        return monthlyNetSalary;
+    }
+
+    public void setMonthlyNetSalary(double monthlyNetSalary) {
+        this.monthlyNetSalary = monthlyNetSalary;
+    }
+
+    public double getTotalExpenses() {
+        return totalExpenses;
+    }
+
+    public void setTotalExpenses(double totalExpenses) {
+        this.totalExpenses = totalExpenses;
+    }
+
+    @Override
+    public String toString() {
+        return "Statistics" +
+                "\nmonthly gross salary = " + monthlyGrossSalary +
+                "\nmonthly taxes = " + monthlyTaxes +
+                "\nmonthly net salary = " + monthlyNetSalary +
+                "\ntotal expenses = " + totalExpenses +
+                '\n';
+    }
+}
diff --git a/src/com/mavlon/finances/Wallet.java b/src/com/mavlon/finances/Wallet.java
new file mode 100644
index 0000000..f3a04e0
--- /dev/null
+++ b/src/com/mavlon/finances/Wallet.java
@@ -0,0 +1,40 @@
+package com.mavlon.finances;
+
+import java.io.Serializable;
+
+public class Wallet implements Serializable {
+    private double money;
+
+    public Wallet() {
+    }
+
+    public Wallet(double money) {
+        this.money = money;
+    }
+
+    public void put(double money) {
+        this.money += money;
+    }
+
+    public void take(double money) {
+        if (this.money < money) {
+            throw new IllegalArgumentException("You do not have such money.");
+        }
+        this.money -= money;
+    }
+
+    public double getMoney() {
+        return money;
+    }
+
+    public void setMoney(double money) {
+        this.money = money;
+    }
+
+    @Override
+    public String toString() {
+        return "Wallet" +
+                "\nmoney = " + money +
+                '\n';
+    }
+}