//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 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 запиÑи в файл и Ñ‡Ñ‚ÐµÐ½Ð¸Ñ Ð¸Ð· файла Ð´Ð»Ñ ÐºÐ»Ð°ÑÑа JavaRush.
Ð’ файле your_file_name.tmp может быть неÑколько объектов JavaRush.
Метод main реализован только Ð´Ð»Ñ Ð²Ð°Ñ Ð¸ не учаÑтвует в теÑтировании.
ТребованиÑ:
1. Логика чтениÑ/запиÑи Ñ€ÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð°Ñ Ð² методах save/load должна работать корректно в Ñлучае, еÑли ÑпиÑок users пуÑтой.
2. Логика чтениÑ/запиÑи Ñ€ÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð°Ñ Ð² методах save/load должна работать корректно в Ñлучае, еÑли ÑпиÑок users не пуÑтой.
3. КлаÑÑ Solution.JavaRush не должен поддерживать Ð¸Ð½Ñ‚ÐµÑ€Ñ„ÐµÐ¹Ñ Serializable.
4. КлаÑÑ Solution.JavaRush должен быть публичным.
5. КлаÑÑ Solution.JavaRush не должен поддерживать Ð¸Ð½Ñ‚ÐµÑ€Ñ„ÐµÐ¹Ñ 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 иÑправьте outputStream/inputStream в ÑоответÑтвии Ñ Ð¿ÑƒÑ‚ÐµÐ¼ 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 Ð´Ð»Ñ Ð¾Ð±ÑŠÐµÐºÑ‚Ð° 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 users = new ArrayList<>();
public void save(OutputStream outputStream) throws Exception {
//implement this method - реализуйте Ñтот метод
}
public void load(InputStream inputStream) throws Exception {
//implement this method - реализуйте Ñтот 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;
}
}
------------------------------------------------------------------------------------------------------------------------------
*/