Task - Serialization - Transient Data

[akash-coded]

Serialization and Deserialization

Declare a serializable class User which has the following data members:

• serialVersionUID
• country (String, static, "INDIA")
• name (String, private)
• email (String, private)
• password (String, transient, private)

The class also contains constructors, toString(), getters, and setters.

---

Declare a class SaveUser that instantiates a user object and serializes it into a file called userdata.txt

After successful serialization, it prints "user record saved".

---

Declare a class FetchUser that deserializes the user object from userdata.txt. After successful deserialization, it prints "user record retrieved".

The class also sets a password for the retrieved user object by using Java field reflection.

The class prints the details of the user.

Note - Keep all the code files in a package named user_data_migration

[Sarfinaa]

User Class

package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }

}

SaveUser Class

package user_data_migration;

import java.io.*;

public class SaveUser {
    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("week_4/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            // Creating the object
            User user = new User("karan seth", "karanseth@gmail.com", "1234");
            // Write the object into the file
            out.writeObject(user);
            // Flush the output stream pipe
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("user record not saved!!!");
            System.out.println(e);
        }
    }
}

FetchUser Class

package user_data_migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String args[]) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {
            // Reading the object file
            fin = new FileInputStream("week_4/userdata.txt");
            // Creating stream to read the object
            in = new ObjectInputStream(fin);
            User user = (User) in.readObject();
            // printing the data of the serialized object
            System.out.println("user record retrieved");
            Class usercls = user.getClass();
            Field pass = usercls.getDeclaredField("password");
            pass.setAccessible(true);
            pass.set(user, "1234");
            System.out.println((String) pass.get(user));
            System.out.println(user);

        } catch (Exception e) {
            System.out.println("user record not retrieved");
            System.out.println(e);
        } finally {
            // closing the stream
            in.close();
            // closing the file input stream
            fin.close();
        }
    }
}

[Gaurav-Joshi-31]

User class

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [country=" + country + ", email=" + email + ", name=" + name + ", password=" + password + "]";
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

SaveUser --

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaverUser {
    public static void main(String[] args) {
        User user = new User("Gaurav", "gaurav3joshi316@gmail.com", "grvj123");
        try (FileOutputStream fos = new FileOutputStream("userdata.txt")) {
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(user);
            System.out.println("User record saved");
            oos.flush();
        } catch (Exception e) {
            System.out.println("Failure");
        }
    }
}

FetchUser--

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) {
        try (FileInputStream fis = new FileInputStream("userdata.txt")) {
            try (ObjectInputStream ois = new ObjectInputStream(fis)) {
                User user = (User) ois.readObject();
                System.out.println("User record retrieved");
                Class cls = user.getClass();
                Field password = cls.getDeclaredField("password");
                password.setAccessible(true);
                password.set(user, "grvj123");
                System.out.println(user);

            }
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

[Ashwesh09]

class User

package Week5.Reflection.user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;
    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }
    public static String getCountry() {
        return country;
    }
    public static void setCountry(String country) {
        User.country = country;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User\nEmail: \t\t" + email + "\nName: \t\t" + name + "\nPassword: \t" + password;
    }
}

class SaveUser

package Week5.Reflection.user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {
        User newUser = new User("Ashwesh","ashwesh@gmail.com","Password123");
        try (FileOutputStream fos = new FileOutputStream("Week5/Reflection/user_data_migration/userdata.txt");
                ObjectOutputStream oos = new ObjectOutputStream(fos)) {
            oos.writeObject(newUser);
            oos.flush();
            System.out.println("User record saved!");    
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

class FetchUser

package Week5.Reflection.user_data_migration;

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.Field;

public class FetchUser {
    public static void main(String[] args) {
           
       try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("Week5/Reflection/user_data_migration/userdata.txt"))) {
            User newUser = (User) ois.readObject();
            System.out.println("User record retrieved");
            Class userClass = newUser.getClass();
            Field fieldOfPassWord = userClass.getDeclaredField("password");
            fieldOfPassWord.setAccessible(true);
            fieldOfPassWord.set(newUser, "MyNewPass2ord123");
            System.out.println(newUser);
        }
        catch (Exception e) {
            System.out.println(e.getMessage());
        }
   } 
}

[preeti-max]

USER CLASS:
package Reflection.user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    transient private String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", country= " + User.country
                + "]";
    }

}


SAVE USER CLASS:
package Reflection.user_data_migration;

import java.io.*;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {

            User user = new User("Preeti", "isthatright@gmail.com", "1234");

            out.writeObject(user);

            out.flush();
            System.out.println("User record saved");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }

    }

}


FETCHUSER CLASS:

package Reflection.user_data_migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {

            fin = new FileInputStream("userdata.txt");

            in = new ObjectInputStream(fin);
            User s = (User) in.readObject();
            System.out.println("user record retreived");
            System.out.println(s);
            Class obj = s.getClass();

            Field field1 = obj.getDeclaredField("password");
            field1.setAccessible(true);

            field1.set(s, "89034");
            System.out.println(s);

        } catch (Exception e) {
            System.out.println(e);
        } finally {

            in.close();

            fin.close();
        }

    }

}

[abhiraj2k]

//User.java

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public User() {
    };

    public User(String name, String email, String password) {
        this.email = email;
        this.password = password;
        this.name = name;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }

}

//SaveUser.java

public class SaveUser {
    public static void main(String[] args) {

        try (FileOutputStream fout = new FileOutputStream("reflection/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User newUser = new User("John", "abc@gmail.com", "abc@123");
            out.writeObject(newUser);
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

//FetchUser.java

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.Field;

public class FetchUser {
    public static void main(String[] args) throws NoSuchFieldException {

        try (FileInputStream fin = new FileInputStream("reflection/userdata.txt");
                ObjectInputStream in = new ObjectInputStream(fin);) {
            User newUser2 = (User) in.readObject();

            System.out.println("user record retrieved");

            Class userClass = newUser2.getClass();

            Field passwordField = userClass.getDeclaredField("password");
            passwordField.setAccessible(true);
            passwordField.set(newUser2, "newPass@123");
            System.out.println(passwordField.get(newUser2));
            System.out.println(newUser2);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

[RohitNaikade1]

User.java

package user_data_migration;

import java.io.*;

class User implements Serializable {
    public static String Country="INDIA";
    private String name,email;
    private transient String password;
    
    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }
    public static String getCountry() {
        return Country;
    }
    public static void setCountry(String country) {
        Country = country;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }
    
}

SaveUser.java

package user_data_migration;

import java.util.Scanner;
import java.io.*;
public class SaveUser {
    public static void main(String[] args){
        Scanner s1 = new Scanner(System.in);

        User user=new User("Rohit Naikade","rohit@gmail.com","User@123");
        System.out.println(user);

        try{
            FileOutputStream fout=new FileOutputStream("user_data_migration/userdata.txt");
            ObjectOutputStream wobj=new ObjectOutputStream(fout);
            wobj.writeObject(user);
            System.out.println("User stored successfully");
        }catch(Exception e){
            System.out.println(e);
        }
        
    }
}

FetchUser.java

package user_data_migration;
import java.util.Scanner;
import java.io.*;
import java.lang.reflect.*;
public class FetchUser {
    public static void main(String[] args) {
        Scanner s1 = new Scanner(System.in);

        try {
            FileInputStream fin = new FileInputStream("user_data_migration/userdata.txt");
            ObjectInputStream wobj = new ObjectInputStream(fin);
            
            User user=(User)wobj.readObject();
            Class obj = user.getClass();

            Field field1 = obj.getDeclaredField("password");

            field1.setAccessible(true);

            field1.set(user, "User@123");
            String password = (String) field1.get(user);
            
            System.out.println(user);
            System.out.println("Value: " + password);
            System.out.println("Country: "+User.Country);

        } catch (Exception e) {
            System.out.println(e);
        }

    }
}

[Shubhi27]

User Class

package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

  @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", country=" + country + "]";
    }

}

SaveUser Class

package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("user_data_migration/userData.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User user = new User("Shubhi", "shubhigiri@gmail.com", "1234");
            out.writeObject(user);
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("failure occured");
            System.out.println(e);
        }
    }
}

Fetch User Class

package user_data_migration;

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.Class;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) {

        try (FileInputStream fin = new FileInputStream("user_data_migration/userData.txt")) {
            try (ObjectInputStream in = new ObjectInputStream(fin)) {
                User user = (User) in.readObject();

                System.out.println("user record reterived");

                Class cls = user.getClass();
                Field password = cls.getDeclaredField("password");
                password.setAccessible(true);
                password.set(user, "123456sh");
                System.out.println(user);
            }

        } catch (Exception e) {
            System.out.println(e);
        }

    }

}

[Samyuktha26]

package User_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    // serialVersionUID
    // country (String, static, "INDIA")
    // name (String, private)
    // email (String, private)
    // password (String, transient, private)
    static String country = "India";
    private String name;
    private String email;
    private int serialVersionUID = 1;
    transient private String password;

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }

}
package User_data_migration;

import java.io.*;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User_data_migration.User userObj = new User_data_migration.User("Samyuktha", "abc@gmail.com", "pass@123");
            out.writeObject(userObj);
            out.flush();
            System.out.println("User Record Saved");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }
    }

}
package User_data_migration;

import java.io.*;

import java.lang.Class;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) {
        try (FileInputStream fin = new FileInputStream("userdata.txt");
                ObjectInputStream in = new ObjectInputStream(fin);) {

            User user1 = (User) in.readObject();
            // printing the data of the serialized object
            System.out.println(user1.toString());
            System.out.println("User Record retrieved");
            Class obj = user1.getClass();

            Field field1 = obj.getDeclaredField("password");
            field1.setAccessible(true);
            field1.set(user1, "xyz@123");
            String newPassword = (String) field1.get(user1);
            System.out.println("Password: " + newPassword);
            System.out.println(user1.toString());
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

[ShraddhaPenshanwar]

``package user_data_migration;

import java.io.*;

public class SaveUser {
public static void main(String... args) {
try (FileOutputStream fout = new FileOutputStream("userdata.text");
ObjectOutputStream out = new ObjectOutputStream(fout);) {

        UserD user = new UserD("Shraddha", "iamauser@gmail.com", "1234");

        out.writeObject(user);

        out.flush();
        System.out.println("user record saved");
    } catch (Exception e) {
        System.out.println("user record not saved!!!");
        System.out.println(e);
    }
}

}``

``package user_data_migration;

import java.io.Serializable;

public class UserD implements Serializable {
private static final long serialVersionUID = 1L;
static String country = "India";
private String name;
private String email;
private transient String password;

public UserD(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
}

}
``

[RohitN09]

User Class

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", country=" + country + "]";
    }
}

Save User

import java.io.*;

public class SaveUser {

    public static void main(String[] args) throws IOException {

        try (FileOutputStream fout = new FileOutputStream("Week_5/user_data_migration/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User user = new User("Rohit", "rohitnayal@gmail.com", "RohitN9");
            out.writeObject(user);
            out.flush();
            System.out.println("User Record Saved");
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

Fetch User

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {

    public static void main(String[] args) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;

        try {
            fin = new FileInputStream("Week_5/user_data_migration/userdata.txt");
            in = new ObjectInputStream(fin);

            User user = (User) in.readObject();
            System.out.println("User Record Retrieved.");

            Class cls = user.getClass();
            Field pass = cls.getDeclaredField("password");
            pass.setAccessible(true);
            pass.set(user, "RohitN09");

            System.out.println(user);

        } catch (Exception e) {
            System.out.println(e);
        } finally {
            in.close();
            fin.close();
        }
    }
}

[Khyati-tripathi]

User.java class

package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "[ name=" + name + ", email= " + email + ", password=" + password + " country= " + User.country + " ]";
    }

}

SaveUser.java

package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {

        try (FileOutputStream fout = new FileOutputStream("userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User u1 = new User("khyati", "abc@gmail.com", "password");
            out.writeObject(u1);
            out.flush();
            System.out.println("User Record Saved! ");

        } catch (Exception e) {
            System.out.println("Failed! " + e);
        }

    }

}

FetchUser.java

package user_data_migration;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.lang.reflect.Field;

public class FetchUser {
    public static void main(String[] args)
            throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException,
            IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream("userdata.txt");
            in = new ObjectInputStream(fin);
            User obj = (User) in.readObject();

            System.out.println("user record retrieved");

            Class cls = obj.getClass();
            Field field1 = cls.getDeclaredField("password");
            field1.setAccessible(true);
            field1.set(obj, "updated");

            System.out.println((String) field1.get(obj));
            System.out.println(obj);

        } catch (Exception e) {
            System.out.println("user record not retrieved");
            System.out.println(e);
        } finally {
            in.close();
            fin.close();
        }

    }
}

[SrideviYamala]

//User.java
package Serialization;

import java.io.Serializable;

public class User implements Serializable {
    // The default serialVersionUID. Else a generated one would have been inserted.
    private static final long serialVersionUID = 1L;
    private String name;
    static String country="India";
    private String email;
    transient String password;
    
    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }
    public static long getSerialversionuid() {
        return serialVersionUID;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public static String getCountry() {
        return country;
    }
    public static void setCountry(String country) {
        User.country = country;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", country=" + country +"]";
    }
}

//SaveUser.java
package Serialization;

import java.io.*;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User user=new User("Sridevi","abc@gmail.com","abc123");
            out.writeObject(user);
            out.flush();
            System.out.println("User Record Saved");
        } catch (Exception e) {
            System.out.println("User Record Not Saved");
            System.out.println(e);
        }
    }
}

//FetchUser.java
package Serialization;

import java.io.*;
import java.lang.Class;
import java.lang.reflect.*;

public class FetchUser {
        public static void main(String args[]) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream("userdata.txt");
            in = new ObjectInputStream(fin);
            User user = (User)in.readObject();
            System.out.println("User record retrieved");
            System.out.println(user);
            Class cls =user.getClass();
            Field field = cls.getDeclaredField("password");
            field.setAccessible(true);
            field.set(user,"xyz456");
            String pwd = (String)field.get(user);
            System.out.println("Password set is " + pwd);
        } catch (Exception e) {
            System.out.println(e);
        } finally {
            in.close();
            fin.close();
        }
    }
}

[mkaifahmed]

USER CLASS

package Week5.Tasks.User_Data_Migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public User(String name, String email) {
        this.name = name;
        this.email = email;

    }

    @Override
    public String toString() {

        return ("Name :" + name + "\nEmail :" + email + "\n Password :" + password+"\nCountry :"+country);
    }
}

SAVE USER

package Week5.Tasks.User_Data_Migration;

import java.io.*;

public class SaveUser {
    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("core-java/Week5/Tasks/User_Data_Migration/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {

            User u1 = new User("Kaif", "1904mka@gmail.com");

            out.writeObject(u1);

            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }
    }
}

Fetch User

package Week5.Tasks.User_Data_Migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {

            fin = new FileInputStream("core-java/Week5/Tasks/User_Data_Migration/userdata.txt");
            in = new ObjectInputStream(fin);
            User user = (User) in.readObject();
            System.out.println("user record retrieved");
            Class usercls = user.getClass();
            Field pass = usercls.getDeclaredField("password");
            pass.setAccessible(true);
            pass.set(user, "1234");
         
            System.out.println(user);
        } catch (Exception e) {
            System.out.println("user record not retrieved");
            System.out.println(e);
        } finally {
            in.close();
            fin.close();
        }
    }
}

[amruth2211]

USER CLASS
`package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
private static final long serialVersionUID = 1L;
static String country = "INDIA";
private String name;
private String email;
private transient String password;

public User(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public static long getSerialversionuid() {
    return serialVersionUID;
}

public static String getCountry() {
    return country;
}

public static void setCountry(String country) {
    User.country = country;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
}

}
`

SAVE USER CLASS

`package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
public static void main(String[] args) {
try (FileOutputStream fs = new FileOutputStream("user_data_migration/userdata.txt")) {
ObjectOutputStream out = new ObjectOutputStream(fs);
// Creating the object
User u = new User("Amruth", "Chowdarya@gmail.com", "absc123");
// Write the object into the file
out.writeObject(u);
// Flush the output stream pipe
out.flush();
System.out.println("user record saved");
} catch (Exception e) {
System.out.println("failure");
System.out.println(e);
}
}
}
`

FETCH CLASS
`package user_data_migration;

import java.lang.Class;
import java.lang.reflect.;
import java.io.;

public class Fetch {
public static void main(String args[]) throws IOException {
ObjectInputStream in = null;
FileInputStream fin = null;
try {
fin = new FileInputStream("user_data_migration/userdata.txt");
in = new ObjectInputStream(fin);
User s = (User) in.readObject();

        System.out.println("user record retrieved");

        Class usercls = s.getClass();
        Field pass = usercls.getDeclaredField("password");
        pass.setAccessible(true);
        pass.set(s, "1234");

        System.out.println(s);

    } catch (Exception e) {
        System.out.println(e);
    } finally {
        in.close();
        fin.close();
    }
}

}
`

[rakeshGit419]

**User**
package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {

    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;
    
    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }
    public static String getCountry() {
        return country;
    }
    public static void setCountry(String country) {
        User.country = country;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password +"country"+country+ "]";
    }
    
}

**SaveUser**
package user_data_migration;

import java.io.*;

class SaveUser {
    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            // Creating the object
            User s1 = new User("ShowBot","showbot@gmail.com","123456");
            // Write the object into the file
            out.writeObject(s1);
            // Flush the output stream pipe
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }
    }
}


**FetchUser**
package user_data_migration;

import java.io.*;
import java.lang.reflect.Field;

public class FetchUser  {
    public static void main(String[] args) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {
            // Reading the object file
            fin = new FileInputStream("userdata.txt");
            // Creating stream to read the object
            in = new ObjectInputStream(fin);

            User s = (User) in.readObject();
            System.out.println("user record retrieved");

            Class cls = s.getClass();
            Field f1 = cls.getDeclaredField("password");
            f1.setAccessible(true);
            f1.set(s,"234");

            System.out.println(s);

        } catch (Exception e) {
            System.out.println(e);
        } finally {
            // closing the stream
            in.close();
            // closing the file input stream
            fin.close();
        }
    }
}

[Harshita-Joshi]

User class

package Serialization.User_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    
    public static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    @Override
    public String toString() {
        return "User \nemail = " + email + "\nname = " + name + "\npassword = "+password;
    } 

}

Class SaveUser

package Serialization.User_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {
        
        User user = new User("ABC", "abc@gmail.com", "ABC*123");
        try{
            FileOutputStream fout = new FileOutputStream("Serialization/User_data_migration/userdata.txt");
            ObjectOutputStream objout = new ObjectOutputStream(fout);
            objout.writeObject(user);
            objout.flush();
            objout.close();
            fout.close();
            System.out.println("User record saved");
        }catch(Exception e){
            System.out.println("Error in serialization!!");
            e.getMessage();
        }

    }
}

Class FetchUser

package Serialization.User_data_migration;

import java.io.FileInputStream;
import java.io.ObjectInputStream;

import javax.sound.midi.Synthesizer;
import java.lang.reflect.Field;

public class FetchUser {

    static void printDetails(User u){
        System.out.println(u);
    }
    
    public static void main(String[] args) {
        
        try{
            FileInputStream fin = new FileInputStream("Serialization/User_data_migration/userdata.txt");
            ObjectInputStream oin = new ObjectInputStream(fin);
            User user = (User) oin.readObject();
            oin.close();
            fin.close();
            System.out.println("User record retrieved");
            Field field = user.getClass().getDeclaredField("password");
            field.setAccessible(true);
            field.set(user, "ABC@abc12");
            printDetails(user);
        }catch(Exception e){
            System.out.println("Deserialization failed");
            e.getMessage();
        }

        



    }
}

[Batchusatyasri]

User.java

package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
private static final long serialVersionUID = 1L;
static String country = "INDIA";
private String name;
private String email;
private transient String password;

User(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public static long getSerialversionuid() {
    return serialVersionUID;
}

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

public void setEmail(String email) {
    this.email = email;
}

public void setPassword(String password) {
    this.password = password;
}

public String getname() {
    return name;
}

public String getEmail() {
    return email;
}

public String getPassword() {
    return password;
}

public String toString() {
    return "Iam from " + country + "  Name: " + name + " Email: " + email + " Password: " + password;
}

}

Saveuser.java

package user_data_migration;

import java.io.*;

public class SaveUSer {
public static void main(String[] args) {
try (FileOutputStream fout = new FileOutputStream("user_data_migration/userdata.txt");
ObjectOutputStream out = new ObjectOutputStream(fout);) {

        User obj = new User("satyasri", "batchusatyasri@gmail.com", "password");
        out.writeObject(obj);
        out.flush();
        System.out.println("user record saved");
    } catch (Exception e) {
        System.out.println("failure");
        System.out.println(e);
    }
}

}

Fetchuserclass.java

package user_data_migration;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.lang.reflect.Field;

public class Fetchuserclass {
public static void main(String[] args) throws IOException {
ObjectInputStream in = null;
FileInputStream fin = null;
try {
// Reading the object file
fin = new FileInputStream("user_data_migration/userdata.txt");
// Creating stream to read the object
in = new ObjectInputStream(fin);
User obj = (User) in.readObject();
// printing the data of the serialized object

        System.out.println("user record retrieved");

        Class cls = obj.getClass();
        Field field1 = cls.getDeclaredField("password");
        field1.setAccessible(true);
        field1.set(obj, "updated");

        System.out.println((String) field1.get(obj));
        System.out.println(obj);
    } catch (Exception e) {
        System.out.println("user record not retrieved");
        System.out.println(e);
    } finally {
        // closing the stream
        in.close();
        // closing the file input stream
        fin.close();
    }
}

}

[GantaGreeshma]

Userclass

package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

class SerializationAndDeserialization implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public SerializationAndDeserialization(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        SerializationAndDeserialization.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", serialVersionUID="
                + serialVersionUID + "]";
    }

}

**Saveuser**
package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream out = new FileOutputStream("userdata.txt");
                ObjectOutputStream output = new ObjectOutputStream(out);) {
            SerializationAndDeserialization user = new SerializationAndDeserialization("greeshma",
                    "greshma.217984@gmail.com", "greeshma@123");
            output.writeObject(user);
            output.flush();
            System.out.println("user saved record");
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}
**Fetchclass**
package user_data_migration;

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) {
        try (FileInputStream input = new FileInputStream("userdata.txt")) {
            try (ObjectInputStream obj = new ObjectInputStream(input)) {
                SerializationAndDeserialization user = (SerializationAndDeserialization) obj.readObject();
                System.out.println("user record retrived");
                Class cls = user.getClass();
                Field password = cls.getDeclaredField("chitti");
                password.setAccessible(true);
                password.set(user, "chitti123");
                System.out.println(user);
            }
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

[Mrafe]

package week5.Tuesday.user_data_migration;

import java.io.*;

public class User implements Serializable {
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", Country=" + country + "]";
    }

}

package week5.Tuesday.user_data_migration;

import java.io.*;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("week5/Tuesday/user_data_migration/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            // Creating the object
            User u1 = new User("Nezuko", "kawai@xyz.com", "Senapaii");
            // Write the object into the file
            out.writeObject(u1);
            // Flush the output stream pipe
            out.flush();
            System.out.println("User record saved");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }
    }
}

package week5.Tuesday.user_data_migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException {
        ObjectInputStream in = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream("week5/Tuesday/user_data_migration/userdata.txt");
            in = new ObjectInputStream(fin);
            User user = (User) in.readObject();
            System.out.println("user record retrieved");
            Class userClass = user.getClass();
            Field password = userClass.getDeclaredField("password");
            password.setAccessible(true);
            password.set(user, "onii-chan");
            // System.out.println((password.get(user)));
            System.out.println(user);

        } catch (Exception e) {
            System.out.println("user record not retrieved");
            System.out.println(e);
        } finally {
            in.close();
            fin.close();
        }
    }
}

[ratnadeepikavuddagiri]

`package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
static String country = "INDIA";
private String name;
private String email;
private transient String password;

public User() {
}

public User(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public static String getCountry() {
    return country;
}

public static void setCountry(String country) {
    User.country = country;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "email=" + email + ", name=" + name + ", password=" + password + ", country="+User.country;
}

}

package user_data_migration;

import java.io.*;
public class SaveUser {
public static void main(String... args) {

    try (FileOutputStream fout = new FileOutputStream("user_data_migration/userdata.txt");
            ObjectOutputStream out = new ObjectOutputStream(fout);) {
        User user = new User("Deepika", "deepika@gmail.com","deepika123");
        out.writeObject(user);
        out.flush();
        System.out.println("User Record Saved");
    } catch (Exception e) {
        System.out.println("Saving User Record Failed");
        System.out.println(e);
    }
}

}

package user_data_migration;

import java.io.*;
import java.lang.reflect.Field;

public class FetchUser {
public static void main(String args[]) throws IOException, NoSuchFieldException {

    ObjectInputStream in = null;
    FileInputStream fin = null;

    try {
        fin = new FileInputStream("user_data_migration/userdata.txt");
        in = new ObjectInputStream(fin);
        User user = (User) in.readObject();
        System.out.println("User Record Retreived");
        Class cls = user.getClass();
        Field field = cls.getDeclaredField("password");
        field.setAccessible(true);
        field.set(user,"deepika2000");
        System.out.println(user);
    } catch (Exception e) {
        System.out.println(e);
    } finally {
        in.close();
        fin.close();
    }
}

}

`

[vysh675]

import java.io.Serializable;

class user implements Serializable {
private int serialVersionUID;
static String country = "INDIA";
private String name;
private String email;
private transient String password;

user(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
}

}

class SaveUser {
public static void main(String[] args) {
try (FileOutputStream fout = new FileOutputStream("userdata.txt");
ObjectOutputStream out = new ObjectOutputStream(fout);) {
user u = new user("hari", "hari@gmail.com", "hari456");
out.writeObject(u);
out.flush();
System.out.println("user record saved. serialize success");
} catch (Exception e) {
System.out.println("user record not saved!!!");
System.out.println(e);
}
}
}

class fetchuser {
public static void main(String[] args) {

    try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("userdata.txt"))) {
        user newUser = (user) ois.readObject();
        System.out.println("User record retrieved");
        Class userClass = newUser.getClass();
        Field fieldOfPassWord = userClass.getDeclaredField("password");
        fieldOfPassWord.setAccessible(true);
        fieldOfPassWord.set(newUser, "pass3856");
        System.out.println(newUser);
    } catch (Exception e) {
        System.out.println(e.getMessage());
    }
}

}

[Ashritha-sd]

package serialisation;
public class User implements Serializable{
private static final long serialVersionId=1L;
static String country="India";
private String name;
private String email;
private transient String password;
public User(String name,String email,String password)
{
this.name=name;
this.email=email;
this.password=password;
}
public String getName()
{
return name;
}

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

public String getEmail() 
{
    return email;
}

public void setEmail(String email) 
{
    this.email=email;
}

public String getPassword() 
{
    return password;
}

public void setPassword(String password) 
{
    this.password=password;
}

@Override
public String toString() 
{
    return "User [email = " + email + ", name = " + name + ", password = " + password +", country = "+ country + "]";
}

}

package serialisation;
public class SaveUser
{
public static void main(String args[])
{
try (FileOutputStream fout = new FileOutputStream("week_4/userdata.txt");
ObjectOutputStream out = new ObjectOutputStream(fout);) {
User user = new User("Ashritha", "ash9@gmail.com", "123");
out.writeObject(user);
out.flush();
System.out.println("user record saved");
} catch (Exception e) {
System.out.println("user record not saved!!!");
System.out.println(e);
}
}
}

package serialisation;
public class FetchUserClass {
public static void main(String args[])
{
ObjectInputStream in = null;
FileInputStream fin = null;
try {
fin = new FileInputStream("serialisation/userdata.txt");
in = new ObjectInputStream(fin);
User user = (User) in.readObject();
System.out.println("user record retrieved");
Class ucls = user.getClass();
Field p = ucls.getDeclaredField("password");
p.setAccessible(true);
p.set(user, "1234");
System.out.println((String) p.get(user));
System.out.println(user);

    } catch (Exception e) {
        System.out.println("user record not retrieved");
        System.out.println(e);
    } finally {
        in.close();
        fin.close();
    }
}

}

[VigneshVishwa]

//User class 
package User_data_migration;

import java.io.Serializable;

class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    transient private String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

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

    public String getName() {
        return this.name;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }
}

//Save User
package User_data_migration;

import java.util.*;
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("src/f.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            // Creating the object
            User u = new User("Vicky", "Vicky1234@mail.com", "instagram123");
            // Write the object into the file
            out.writeObject(u);
            // Flush the output stream pipe
            out.flush();
            System.out.println("success");
        } catch (Exception e) {
            System.out.println("failure");
            System.out.println(e);
        }
    }
}

//FetchUser
//FetchUser
package User_data_migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException, ClassNotFoundException, IllegalArgumentException,
            IllegalAccessException, NoSuchFieldException, SecurityException {
        ObjectInputStream oin = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream("src/f.txt");
            oin = new ObjectInputStream(fin);
            User user = (User) oin.readObject();
            System.out.println("record received");
            Class usercls = user.getClass();
            Field pass = usercls.getDeclaredField("password");
            pass.setAccessible(true);
            pass.set(user, "8520");
            System.out.println((String) pass.get(user));
            System.out.println(user);

        } catch (FileNotFoundException e) {
            System.out.println(e);
        } finally {
            oin.close();
            fin.close();
        }
    }
}
package User_data_migration;

import java.io.*;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException, ClassNotFoundException, IllegalArgumentException,
            IllegalAccessException, NoSuchFieldException, SecurityException {
        ObjectInputStream oin = null;
        FileInputStream fin = null;
        try {
            fin = new FileInputStream("src/f.txt");
            oin = new ObjectInputStream(fin);
            User user = (User) oin.readObject();
            System.out.println("record received");
            Class usercls = user.getClass();
            Field pass = usercls.getDeclaredField("password");
            pass.setAccessible(true);
            pass.set(user, "8520");
            System.out.println((String) pass.get(user));
            System.out.println(user);

        } catch (FileNotFoundException e) {
            System.out.println(e);
        } finally {
            oin.close();
            fin.close();
        }
    }
}

[PavanArvapally]

User Class
`package user_data_migration;

import java.io.Serializable;

public class User implements Serializable{
private static final long serialVersionUID = 1L;
static String country = "India";
private String name;
private String email;
private transient String password;

public User(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
}

}
`

SaveUser Class

`package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
public static void main(String[] args) {
try(FileOutputStream fout = new FileOutputStream("userdata.txt");
ObjectOutputStream out = new ObjectOutputStream(fout);){
User user = new User("Pavan", "HumBhiBanaLenge@expertise.com", "doglapan");
out.writeObject(user);
out.flush();
System.out.println("User record saved");
}catch(Exception e){
System.out.println("failure");
System.out.println(e);
}

}

}
`

FetchUser Class

`package user_data_migration;

import java.io.;
import java.lang.reflect.;

public class FetchUser {
public static void main(String[] args) {

    try(FileInputStream fin = new FileInputStream("userdata.txt");
    ObjectInputStream in = new ObjectInputStream(fin);){
        User user = (User) in.readObject();
        System.out.println("user record retrieved");
        System.out.println(user);
        Class UserClass = user.getClass();
        Field field = UserClass.getDeclaredField("password");
        field.setAccessible(true);
        field.set(user, "magic");
        System.out.println(user);
    }catch(Exception e){
        System.out.println(e);
    }/*finally{
        in.close();
        fin.close();
    }*/
}

}`

[SabaMhabar]

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.*;

class User implements Serializable {
private static final long serialVersionUID = 1L;
static String country = "India";
private String name;
private String email;
private transient String password;

public User(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public String getCountry() {
    return country;
}

public static void setCountry(String country) {
    User.country = country;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
}

}

class SaveUser {
User user = new User("Saba", "abc@gmail.com", "xyz@123");

void save() throws IOException {
    FileOutputStream fout = new FileOutputStream("userdata.txt");
    ObjectOutputStream oos = new ObjectOutputStream(fout);
    oos.writeObject(user);
    oos.flush();
    oos.close();
    System.out.println("Object Saved");
}

}

class FetchUser {
User user;

void getObject() throws ClassNotFoundException, IOException, NoSuchFieldException, SecurityException,
        IllegalArgumentException, IllegalAccessException {
    ObjectInputStream in = null;
    FileInputStream fin = null;
    try {
        fin = new FileInputStream("userdata.txt");
        in = new ObjectInputStream(fin);
        User s = (User) in.readObject();
        System.out.println("user record retreived");
        System.out.println(s);
        Class obj = s.getClass();
        Field field1 = obj.getDeclaredField("password");
        field1.setAccessible(true);
        field1.set(s, "1234");
        System.out.println(s);
    } catch (Exception e) {
        System.out.println(e);
    } finally {
        in.close();
        fin.close();
    }
}

}

public class SerializableSemo {

public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, SecurityException,
        IllegalArgumentException, IllegalAccessException {
    SaveUser s = new SaveUser();
    FetchUser f = new FetchUser();
    try {
        s.save();
        f.getObject();
    } catch (IOException e) {
        e.getStackTrace();
    }
}

}

[KaminiJha]

User file
package Serialization_Deserialization.user_data_migration;
import java.io.Serializable;

class UserS implements Serializable
{
private static final long serialVersionUID=1L;
static String country="INDIA";
private String name;
private String email;
private transient String password;
public UserS(String name, String email, String password) {
    this.name = name;
    this.email = email;
    this.password = password;
}

public String getName() {
    return name;
}

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

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@Override
public String toString() {
    return "UserS [email=" + email + ", name=" + name + ", password=" + password + "]";
}  

}

SaveUser
package Serialization_Deserialization.user_data_migration;
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {
         try (FileOutputStream fout = new FileOutputStream("Serialization_Deserialization/user_data_migration/userdata.txt");
            ObjectOutputStream out = new ObjectOutputStream(fout);) {
            UserS user = new UserS("Kamini", "kamini1@gmail.com", "kkkk");
            out.writeObject(user);
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

FetchUser
package Serialization_Deserialization.user_data_migration;

// import java.io.*;
// import java.lang.Class;
// import java.lang.reflect.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) throws IOException, ClassNotFoundException, IllegalArgumentException,
            IllegalAccessException, NoSuchFieldException {
        try (FileInputStream fileInputStream = new FileInputStream(
                "Serialization_Deserialization/user_data_migration/userdata.txt");) {
            try (ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream)) {
                UserS user = (UserS) objectInputStream.readObject();
                System.out.println("User record retrieved");
                Class cls = user.getClass();
                Field password = cls.getDeclaredField("password");
                password.setAccessible(true);
                password.set(user, "abc123");
                System.out.println(user);
                objectInputStream.close();
                fileInputStream.close();

            }
        } catch (Exception e) {
            System.out.println(e);
        }

    }
}

[shreiyarandive]

User.java

import java.io.Serializable;

class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getCountry() {
        return country;
    }

    @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + "]";
    }
}

SaveUser.java

package week5.serialization;

import java.io.*;

public class SaveUser {

    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("week5/serialization/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User user = new User("Shreiya", "shreiyarandive1@gmail.com", "5969");
            out.writeObject(user);
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("user record not saved!!!");
            System.out.println(e);
        }
    }
}

FetchUser.java

package week5.serialization;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.lang.reflect.Field;

public class FetchUser {
    public static void main(String[] args) {

        try (FileInputStream fis = new FileInputStream("week5/serialization/userdata.txt");
                ObjectInputStream ois = new ObjectInputStream(fis);) {
            User user = (User) ois.readObject();

            System.out.println("user record retrieved");

            Class cls = user.getClass();
            Field password = cls.getDeclaredField("password");
            password.setAccessible(true);
            password.set(user, "2000");

            System.out.println(user);

        } catch (IOException | ClassNotFoundException | NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}

[lalit-ky]

User.java

package Serialization.user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "India";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User [Email : " + email + ", Name : " + name + ", Password : " + password + ", Country : " + country
                + "]";
    }

}

SaveUser.java

package Serialization.user_data_migration;

import java.io.*;

public class SaveUser {
    public static void main(String... args) {
        try (FileOutputStream fout = new FileOutputStream("Serialization/user_data_migration/userdata.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {

            User user = new User("Light Yagami", "kira@death.note", "KiminoNawa?");
            out.writeObject(user);
            out.flush();
            System.out.println("User Data Saved");
        } catch (Exception e) {
            System.out.println("failed to save user data");
            System.out.println(e);
        }
    }
}

FetchUser.java

package Serialization.user_data_migration;

import java.io.*;

public class FetchUser {
    public static void main(String[] args) throws IOException {

        try (FileInputStream fin = new FileInputStream("Serialization/user_data_migration/userdata.txt");
                ObjectInputStream in = new ObjectInputStream(fin);) {

            User user = (User) in.readObject();
            System.out.println("User Data Retrived :");
            System.out.println(user);
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

[ujjwal18bit1167]

**User Class**

package user_data_migration;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    static String country = "INDIA";
    private String name;
    private String email;
    private transient String password;

    public User(String name, String email, String password) {
        this.name = name;
        this.email = email;
        this.password = password;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

  @Override
    public String toString() {
        return "User [email=" + email + ", name=" + name + ", password=" + password + ", country=" + country + "]";
    }

}

**SaveUser Class**

package user_data_migration;

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SaveUser {
    public static void main(String[] args) {
        try (FileOutputStream fout = new FileOutputStream("user_data_migration/userData.txt");
                ObjectOutputStream out = new ObjectOutputStream(fout);) {
            User user = new User("Shubhi", "shubhigiri@gmail.com", "1234");
            out.writeObject(user);
            out.flush();
            System.out.println("user record saved");
        } catch (Exception e) {
            System.out.println("failure occured");
            System.out.println(e);
        }
    }
}
**Fetch User Class**

package user_data_migration;

import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.Class;
import java.lang.reflect.*;

public class FetchUser {
    public static void main(String[] args) {

        try (FileInputStream fin = new FileInputStream("user_data_migration/userData.txt")) {
            try (ObjectInputStream in = new ObjectInputStream(fin)) {
                User user = (User) in.readObject();

                System.out.println("user record reterived");

                Class cls = user.getClass();
                Field password = cls.getDeclaredField("password");
                password.setAccessible(true);
                password.set(user, "123456sh");
                System.out.println(user);
            }

        } catch (Exception e) {
            System.out.println(e);
        }

    }

}

[Sdey0907]

**

Task - Serialization - Transient Data _Sayan Dey_Completed

**
SerializationTransient Data.zip