//Jesus answered him, "Do you say this by yourself, or did others tell you about me?" (John 18:34)

----------------------------------------------------Solution.java-------------------------------------------------------------

package com.javarush.task.task20.task2002;

import java.io.*;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.*;

public class Solution {

public static void main(String[] args) {

try {

File your_file_name = new File("d:\\5.txt");

OutputStream outputStream = new FileOutputStream(your_file_name);

InputStream inputStream = new FileInputStream(your_file_name);

JavaRush javaRush = new JavaRush();

User usr = new User();

usr.setFirstName("Ivan");

usr.setLastName("Ivanov");

usr.setBirthDate(new GregorianCalendar(1980, 11, 25).getTime());

usr.setCountry(User.Country.RUSSIA);

usr.setMale(true);

javaRush.users.add(usr);

javaRush.save(outputStream);

outputStream.flush();

JavaRush loadedObject = new JavaRush();

loadedObject.load(inputStream);

outputStream.close();

inputStream.close();

} catch (IOException e) {

System.out.println("Oops, something wrong with my file");

} catch (Exception e) {

System.out.println("Oops, something wrong with save/load method");

}

}

public static class JavaRush {

public List<User> users = new ArrayList<>();

public void save(OutputStream outputStream) throws Exception {

DataOutputStream outToFile = new DataOutputStream(outputStream);

outToFile.writeInt(users.size());

for (User user : users) {

String firstName = (user.getFirstName() == null) ? "null" : user.getFirstName();

outToFile.writeUTF(firstName);

String lastName = (user.getLastName() == null) ? "null" : user.getLastName();

outToFile.writeUTF(lastName);

outToFile.writeLong(user.getBirthDate().getTime());

outToFile.writeBoolean(user.isMale());

outToFile.writeUTF(user.getCountry().name());

}

outToFile.flush();

}

public void load(InputStream inputStream) throws Exception {

DataInputStream fromFile = new DataInputStream(inputStream);

int usersCount = fromFile.readInt();

for (int i = 0; i < usersCount; i++) {

User user = new User();

String firstName = fromFile.readUTF();

if (firstName.equals("null")) firstName = null;

user.setFirstName(firstName);

String lastName = fromFile.readUTF();

if (lastName.equals("null")) lastName = null;

user.setLastName(lastName);

user.setBirthDate(new Date(fromFile.readLong()));

user.setMale(fromFile.readBoolean());

user.setCountry(User.Country.valueOf(fromFile.readUTF()));

users.add(user);

}

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

JavaRush javaRush = (JavaRush) o;

return users != null ? users.equals(javaRush.users) : javaRush.users == null;

}

@Override

public int hashCode() {

return users != null ? users.hashCode() : 0;

}

}

}

------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------User.java---------------------------------------------------------------

package com.javarush.task.task20.task2002;

import java.util.Date;

public class User {

private String firstName;

private String lastName;

private Date birthDate;

private boolean isMale;

private Country country;

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public Date getBirthDate() {

return birthDate;

}

public void setBirthDate(Date birthDate) {

this.birthDate = birthDate;

}

public boolean isMale() {

return isMale;

}

public void setMale(boolean male) {

isMale = male;

}

public Country getCountry() {

return country;

}

public void setCountry(Country country) {

this.country = country;

}

public static enum Country {

UKRAINE("Ukraine"),

RUSSIA("Russia"),

OTHER("Other");

private String name;

private Country(String name) {

this.name = name;

}

public String getDisplayedName() {

return this.name;

}

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

User user = (User) o;

if (isMale != user.isMale) return false;

if (firstName != null ? !firstName.equals(user.firstName) : user.firstName != null) return false;

if (lastName != null ? !lastName.equals(user.lastName) : user.lastName != null) return false;

if (birthDate != null ? !birthDate.equals(user.birthDate) : user.birthDate != null) return false;

return country == user.country;

}

@Override

public int hashCode() {

int result = firstName != null ? firstName.hashCode() : 0;

result = 31 * result + (lastName != null ? lastName.hashCode() : 0);

result = 31 * result + (birthDate != null ? birthDate.hashCode() : 0);

result = 31 * result + (isMale ? 1 : 0);

result = 31 * result + (country != null ? country.hashCode() : 0);

return result;

}

}

------------------------------------------------------------------------------------------------------------------------------

/*

Читаем и пишем в файл: JavaRush

Реализуйте логику записи в файл и чтения из файла для класса JavaRush.

В файле your_file_name.tmp может быть несколько объектов JavaRush.

Метод main реализован только для вас и не участвует в тестировании.

Требования:

1. Логика чтения/записи реализованная в методах save/load должна работать корректно в случае, если список users пустой.

2. Логика чтения/записи реализованная в методах save/load должна работать корректно в случае, если список users не пустой.

3. Класс Solution.JavaRush не должен поддерживать интерфейс Serializable.

4. Класс Solution.JavaRush должен быть публичным.

5. Класс Solution.JavaRush не должен поддерживать интерфейс Externalizable.

----------------------------------------------------Solution.java-------------------------------------------------------------

package com.javarush.task.task20.task2002;

import java.io.*;

import java.util.ArrayList;

import java.util.List;

*

Читаем и пишем в файл: JavaRush

*

public class Solution {

public static void main(String[] args) {

//you can find your_file_name.tmp in your TMP directory or fix outputStream/inputStream according to your real file location

//вы можете найти your_file_name.tmp в папке TMP или исправьте outputStream/inputStream в соответствии с путем к вашему реальному файлу

try {

File your_file_name = File.createTempFile("your_file_name", null);

OutputStream outputStream = new FileOutputStream(your_file_name);

InputStream inputStream = new FileInputStream(your_file_name);

JavaRush javaRush = new JavaRush();

//initialize users field for the javaRush object here - инициализируйте поле users для объекта javaRush тут

javaRush.save(outputStream);

outputStream.flush();

JavaRush loadedObject = new JavaRush();

loadedObject.load(inputStream);

//check here that javaRush object equals to loadedObject object - проверьте тут, что javaRush и loadedObject равны

outputStream.close();

inputStream.close();

} catch (IOException e) {

//e.printStackTrace();

System.out.println("Oops, something wrong with my file");

} catch (Exception e) {

//e.printStackTrace();

System.out.println("Oops, something wrong with save/load method");

}

}

public static class JavaRush {

public List<User> users = new ArrayList<>();

public void save(OutputStream outputStream) throws Exception {

//implement this method - реализуйте этот метод

}

public void load(InputStream inputStream) throws Exception {

//implement this method - реализуйте этот метод

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

JavaRush javaRush = (JavaRush) o;

return users != null ? users.equals(javaRush.users) : javaRush.users == null;

}

@Override

public int hashCode() {

return users != null ? users.hashCode() : 0;

}

}

}

------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------User.java---------------------------------------------------------------

package com.javarush.task.task20.task2002;

import java.util.Date;

public class User {

private String firstName;

private String lastName;

private Date birthDate;

private boolean isMale;

private Country country;

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public Date getBirthDate() {

return birthDate;

}

public void setBirthDate(Date birthDate) {

this.birthDate = birthDate;

}

public boolean isMale() {

return isMale;

}

public void setMale(boolean male) {

isMale = male;

}

public Country getCountry() {

return country;

}

public void setCountry(Country country) {

this.country = country;

}

public static enum Country {

UKRAINE("Ukraine"),

RUSSIA("Russia"),

OTHER("Other");

private String name;

private Country(String name) {

this.name = name;

}

public String getDisplayedName() {

return this.name;

}

}

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

User user = (User) o;

if (isMale != user.isMale) return false;

if (firstName != null ? !firstName.equals(user.firstName) : user.firstName != null) return false;

if (lastName != null ? !lastName.equals(user.lastName) : user.lastName != null) return false;

if (birthDate != null ? !birthDate.equals(user.birthDate) : user.birthDate != null) return false;

return country == user.country;

}

@Override

public int hashCode() {

int result = firstName != null ? firstName.hashCode() : 0;

result = 31 * result + (lastName != null ? lastName.hashCode() : 0);

result = 31 * result + (birthDate != null ? birthDate.hashCode() : 0);

result = 31 * result + (isMale ? 1 : 0);

result = 31 * result + (country != null ? country.hashCode() : 0);

return result;

}

}

------------------------------------------------------------------------------------------------------------------------------

*/