Task - Immutability

[akash-coded]

And I am Immutable

Immutable class in java means that once an object is created, we cannot change its content.

WAP to create and implement an immutable class.

[Sarfinaa]

class Immutable1 {
    private final int data;

    Immutable1(int data) {
        this.data = data;
    }

    public final Immutable1 setData(int data) {
        return new Immutable1(data);
    }

    public int getData() {
        return data;
    }
}

public class Immutable {
    public static void main(String[] args) {
        Immutable1 a = new Immutable1(4);
        System.out.println("Hash Code before change:" + a.hashCode());
        a = a.setData(40);
        System.out.println("Hash Code after change:" + a.hashCode());

    }
}

[RohitNaikade1]

package Strings;

import java.util.*;

class Employee{
    private final String Name;
    private final int empno;
    private final double salary;

    public Employee(String name,int empno,double salary){
        this.Name = name;
        this.empno = empno;
        this.salary = salary;
    }

    public String getName() {
        return Name;
    }

    public int getEmpno() {
        return empno;
    }

    public double getSalary() {
        return salary;
    }

    @Override
    public String toString() {
        return "Employee [Name=" + Name + ", empno=" + empno + ", salary=" + salary + "]";
    }

 }
public class ImmutableClass {
    public static void main(String[] args) {
        
        Scanner s1 = new Scanner(System.in);
        System.out.println("Enter Name: ");
        String name = s1.next();
        System.out.println("Enter EmpNo: ");
        int empNo = s1.nextInt();
        System.out.println("Enter Salary: ");
        double salary = s1.nextDouble();

        Employee e1= new Employee(name,empNo,salary);

        System.out.println("Employee Details: ");
        System.out.println(e1);
    }
}

[preeti-max]

`package StringOperations;
final class Task{
private int a;
private int b;
public Task(int a, int b) {
this.a = a;
this.b = b;
}
public int getA() {
return a;
}
public void setA(int a) {
this.a = a;
}
public int getB() {
return b;
}
public void setB(int b) {
this.b = b;
}

}

public class Immutable {
public static void main(String[] args) {
Task t1= new Task(1,2);
System.out.println(t1.getA());

}

}
`

[Gaurav-Joshi-31]

final class ImmutableClass {
    private String name;
    private int rollNo;

    public ImmutableClass() {
        this.name = "Gaurav";
        this.rollNo = 21;
    }

    public ImmutableClass(String name, int rollNo) {
        this.name = name;
        this.rollNo = rollNo;
    }

    public String getName() {
        return name;
    }

    public int getRollNo() {
        return rollNo;
    }

    @Override
    public String toString() {
        return "ImmutableClass [name=" + name + ", rollNo=" + rollNo + "]";
    }

}

public class ImmutableClassDriver {
    public static void main(String[] args) {
        ImmutableClass info1 = new ImmutableClass("Harish", 33);
        System.out.println(info1.getName());
        System.out.println(info1.hashCode());

        ImmutableClass info2 = new ImmutableClass();
        System.out.println(info2.getName());
        System.out.println(info2.hashCode());

        info1 = info2;
        System.out.println(info1.hashCode());

    }
}

[Khyati-tripathi]

package StringModule;

import java.util.*;

final class Immutable {
    private final String a;
    private final String b;

    public Immutable(String a, String b) {
        this.a = a;
        this.b = b;
    }

    public String getA() {
        return a;
    }

    public String getB() {
        return b;
    }

}

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

        Immutable obj = new Immutable("abc", "dgf");
        System.out.println(obj.getA() + " " + obj.getB());
    }

}

[rakeshGit419]

final class Immutable {
    private final String content;
  
    Immutable(String content) {
      this.content = content;
    }

    public String getContent() {
      return content;
    }
  }
  
  public class immutableMain {
    public static void main(String[] args) {
  
      Immutable obj = new Immutable("ShowBot");
      System.out.println(obj.getContent());

      obj = new Immutable("rakesh");
      System.out.println(obj.getContent());
    }
  }

[Batchusatyasri]

final class Demo {
final String aadhaar;

Demo(String aadhaar) {
    this.aadhaar = aadhaar;
}

public String toString() {
    return aadhaar;
}

}

public class Immutable {
public static void main(String[] args) {
Demo obj = new Demo("1234567");
System.out.println(obj);

}

}

[Shubhi27]

package session14;

final class Immutable {
    private final String firstName;
    private final String lastName;
    private final int age;

    public Immutable(String firstName, String lastName, int age) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.age = age;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public int getAge() {
        return age;
    }

    @Override
    public String toString() {
        return "Immutable [age=" + age + ", firstName=" + firstName + ", lastName=" + lastName + "]";
    }

}

public class ImmutableClass {
    public static void main(String[] args) {
        Immutable im = new Immutable("Shubhi", "Giri", 21);
        System.out.println(im);
    }
}

[Mrafe]

import java.util.Scanner;

final class Immutable {
    final String name;
    final int rollNo;

    public Immutable(String name, int rollNo) {
        this.name = name;
        this.rollNo = rollNo;
    }

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

    public int getRollNo() {
        return this.rollNo;
    }
}

class ImmutableDriver {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        int rollNo = scanner.nextInt();
        Immutable obj = new Immutable(name, rollNo);
        System.out.println("The name is : " + obj.name + " rollNo is : " + obj.rollNo);
    }
}

[sruthi-15-sketch]

import java.util.Scanner;
final class Immutable
{
final String name;
Immutable(String name){
this.name=name;
}
String getName(){
return name;
}
}
class Main{
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
Immutable im=new Immutable(sc.next());
System.out.println(im.getName());
}
}

[amruth2211]

`package Week4;

final class Immutable {

private final String name;
private final String location;

public Immutable() {
this.name = "Amruth";
this.location = "Hyderabad";
}

public Immutable(String name, String location) {
this.name = name;
this.location = location;
}

public String getName() {
return name;
}

public String getLocation() {
return location;
}

@OverRide
public String toString() {
return "Immutable [location=" + location + ", name=" + name + "]";
}

}

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

Immutable obj1 = new Immutable();
System.out.println(obj1);

Immutable obj2 = new Immutable("Aasrith", "Banglore");
System.out.println(obj2);

}
}
`

[Kavitha-Golamari]

import java.io.*;
import java.util.Scanner;
final class Immutable{
private String street;
private String city;
public Immutable(String street,String city){
this.street=street;
this.city=city;
}
public void setStreet(String street){
this.street=street;
}
public String getStreet(){
return this.street;
}
public void setCity(String city){
this.city=city;
}
public String getCity(){
return this.city;
}
@OverRide
public String toString(){
return "Street: "+street+"\nCity: "+city;
}
}
class Main{
public static void main(String args[]){
Scanner sc=new Scanner(System.in);
String street=sc.nextLine();
String city=sc.nextLine();
Immutable a=new Immutable(street,city);
System.out.println(a);
}
}

[ratnadeepikavuddagiri]

`final class ImmutableClass{
int a;
int b;

public ImmutableClass(int a, int b) {
    this.a = a;
    this.b = b;
}

public int getA() {
    return a;
}

public void setA(int a) {
    this.a = a;
}

public int getB() {
    return b;
}

public void setB(int b) {
    this.b = b;
}

int add(){
    return this.a+this.b;

}
@Override
public String toString() {
    return "ImmutableClass [a=" + a + ", b=" + b + "]";
}

}

public class Immutable {

public static void main(String[] args) {
    ImmutableClass immutableClass = new ImmutableClass(2,3);
    System.out.println(immutableClass.add());
    System.out.println(immutableClass);
    ImmutableClass immutableClass1 = new ImmutableClass(4,5);
    System.out.println(immutableClass1.add());
    System.out.println(immutableClass1);
}    

}
`

[DivikaAgrawal]

import java.util.*;

final class Immutablecl {
private final int i1;
private final int i2;

public Immutablecl(int i1, int i2) {
    this.i1 = i1;
    this.i2 = i2;
}

public int getI1() {
    return i1;
}

@Override
public String toString() {
    return "Immutablecl [i1=" + i1 + ", i2=" + i2 + "]";
}

public int getI2() {
    return i2;
}

}

public class Immutable {
public static void main(String[] args) {
Immutablecl ob = new Immutablecl(4, 5);
System.out.println(ob.getI1());
System.out.println(ob.getI2());

}

}

[Ashwesh09]

package week4;

class Enterprenure {
    private final String name;
    private final String companyName;
    private final String companyAddress;
    public Enterprenure(String name, String companyName, String companyAddress) {
        this.name = name;
        this.companyName = companyName;
        this.companyAddress = companyAddress;
    }

    public String getName() {
        return name;
    }

    public final Enterprenure setName(String name,String companyName,String companyAddress) {
        return new Enterprenure(name, companyName, companyAddress);
    }
    public String getCompanyName() {
        return companyName;
    }

    public String getCompanyAddress() {
        return companyAddress;
    }
    @Override
    public String toString() {
        return "\nPerson Name : \t\t" + name + "\nCompany Owned : \t" + companyName +"\nCompany Address : \t" + companyAddress;
    }
    
}
public class ImmutableClass {
    public static void main(String[] args) {
        Enterprenure aG = new Enterprenure("Ashneer Grover", "BharatPe", "Delhi, India");
        System.out.println("Enterprenure is an immutable class.\n Its is object: " + aG);
        System.out.println("Hash code: "+aG.hashCode());
        System.out.println("Now after changing values in it with set name method it creats a new object:");
        aG = aG.setName("Anupan Mittal", "Shaddi.com", "Ahmadabad Gujrat");
        System.out.println("Enterprenure is an immutable class.\n Its is object: " + aG);
        System.out.println("Hash code now:"+ aG.hashCode());
    }
}

[Ashritha-sd]

final class Immutable
{
private final String name;
private final double salary;
Immutable(String name,double salary)
{
this.name=name;
this.salary=salary;
}
String getName()
{
return name;
}
double getSalary()
{
return salary;
}
}
class ImmutableDemo {
public static void main(String args[])
{
Immutable i=new Immutable("Ashritha",5000);
System.out.println(i.getName());
System.out.println(i.getSalary());
Immutable j=new Immutable("Ash",6500);
System.out.println(j.getName());
System.out.println(j.getSalary());

}

}

[PavanArvapally]

`final class Student{
private final String name;

public Student(String name) {
    this.name = name;
}

public String getName() {
    return name;
}

@Override
public String toString() {
    return "Student [name=" + name + "]";
}

}

public class ImmutableClass {
public static void main(String[] args) {
Student student1 = new Student("Pavan Kumar");
System.out.println(student1);;
}
}
`

[abhiraj2k]

package strings;

final class Immutable {
    private final int value;

    Immutable(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

}

public class ImmutableDriver {
    public static void main(String[] args) {
        Immutable val1 = new Immutable(10);
        System.out.println(val1);

    }
}

[SrideviYamala]

final class Immutable
{
    private final String name;
    public Immutable(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }
    @Override
    public String toString() {
        return "Immutable [name=" + name + "]";
    }
}
public class ImmutableClass {
    public static void main(String[] args) {
        Immutable obj = new Immutable("Sridevi");
        System.out.println(obj);
    }
}

[VigneshVishwa]

class Immutable {
    int a;
    int b;

    public Immutable() {
        this.a = 10;
        this.b = 11;
    }

    public Immutable(int a, int b) {
        this.a = a;
        this.b = b;
    }

    public int getA() {
        return a;
    }

    public int getB() {
        return b;
    }

    @Override
    public String toString() {
        return "ImmutableClass [name=" + a + ", rollNo=" + b + "]";
    }

}

public class ImmutableClass {
    public static void main(String[] args) {
        Immutable i1 = new Immutable(10, 33);
        System.out.println(i1.getA());
        System.out.println(i1.hashCode());

        Immutable i2 = new Immutable();
        System.out.println(i2.getA());
        System.out.println(i2.hashCode());

        System.out.println(i1.hashCode());
        System.out.println(i2.hashCode());
    }
}

[ShraddhaPenshanwar]

And I am Immutable

Immutable class in java means that once an object is created, we cannot change its content.

WAP to create and implement an immutable class.

`package all_strings;

import java.util.*;

public class Immutable {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
ImmutableStrings str1 = new ImmutableStrings(input);
System.out.println(str1.hashCode());
System.out.println(str1.getString());
ImmutableStrings str2 = str1.removeInitialChar();
System.out.println(str2.hashCode());
System.out.println(str2.getString());

}

}

final class ImmutableStrings {
private static String str;

public ImmutableStrings(String str) {
    this.str = str;
}

public static final String getString() {
    return str;
}

public static ImmutableStrings removeInitialChar() {

    String temp = str;
    temp = temp.substring(1);

    return new ImmutableStrings(temp);

}

}
`

[deepak775035]

package session14;

final class IAmImutable{

    private final int x;

    public IAmImutable(int x) {
        this.x = x;
    }

    public int getX() {
        return x;
    }

    public IAmImutable setX(int x){
        return new IAmImutable(x);
    }

    @Override
    public String toString() {
        return "IAmImutable [x=" + x + "]";
    }

}


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

        IAmImutable yo = new IAmImutable(5);
        System.out.println(yo + " Hascode="+yo.hashCode());
        yo=yo.setX(99);
        System.out.println(yo + " Hascode="+yo.hashCode());
        
    }
}

[lalit-ky]

class Immutable {
    private final int value;

    public Immutable(int value) {
        this.value = value;
    }

    public final int getValue() {
        return value;
    }

    public final Immutable setValue(int value) {
        return new Immutable(value);
    }

    @Override
    public String toString() {
        return "Immutable [value=" + value + "]";
    }

}

public class ImmutableClass {
    public static void main(String[] args) {
        Immutable obj = new Immutable(45);
        System.out.println(obj.hashCode());
        obj = obj.setValue(23);
        System.out.println(obj.hashCode());
    }
}

[shreiyarandive]

final class User {
    private String name;
    private String city;

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

    public String getName() {
        return name;
    }

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

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    @Override
    public String toString() {
        return String.format("Name: %s, City: %s", name, city);
    }

}

public class Immutable {
    public static void main(String[] args) {
        User u1 = new User("Shreiya", "Pune");
        System.out.println("u1 hashCode: " + u1.hashCode());

        User u2 = new User("Ashish", "Mumbai");
        System.out.println("u1 hashCode: " + u2.hashCode());
    }
}

[Prem-3]

`import java.util.Scanner;

final class Immutable {

private final String firstName;
private final int age;

Immutable(String firstName, int age) {
    this.firstName = firstName;
    this.age = age;
}

public String getFirstName() {
    return firstName;
}

public int getAge() {
    return age;
}

@Override
public String toString() {
    return "Immutable [age=" + age + ", firstName=" + firstName + "]";
}

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    String st = sc.next();
    Immutable obj = new Immutable("pk", 22);
    System.out.println(obj);

}

}
`

[Krishreddy460]

final class Immutable
{

// 1.making all data memebers final
private final int id;
private final String name;
// perform deep copy
Immutable(int id,String name)
{
this.id=id;
this.name=name;
}

//setters are not allowed

int getId()
{
return this.id;
}
String getIName()
{
return this.getName;
}

}

public class Ex
{
public static void main(String[] args)
{
Immutable im=new Immutable(1,"hii");
Immutable im1=new Immutable(2,"jii");
System.out.print(im.getId());
System.out.print(im.getName());

}
}

[Harshita-Joshi]

package Strings;

class Immutable {
    
    final int member;
    final static int ID;

    static{
        ID = 1;
    }

    public Immutable(int member) {
        this.member = member;
    }

    public int getMember() {
        return member;
    }


}

public class ImmutableDriver {
    public static void main(String[] args) {
        Immutable a = new Immutable(4);
        System.out.println(a.member+" "+a.ID);
    }
}

[mkaifahmed]

import java.util.*;

class Employee{
    private final String Name;
    private final int empno;
    private final double salary;

    public Employee(String name,int empno,double salary){
        this.Name = name;
        this.empno = empno;
        this.salary = salary;
    }

    public String getName() {
        return Name;
    }

    public int getEmpno() {
        return empno;
    }

    public double getSalary() {
        return salary;
    }

    @Override
    public String toString() {
        return "Employee [Name=" + Name + ", empno=" + empno + ", salary=" + salary + "]";
    }

 }
public class ImmutableClass {
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter Name: ");
        String name = sc.next();
        System.out.println("Enter EmpNo: ");
        int empNo = sc.nextInt();
        System.out.println("Enter Salary: ");
        double salary = sc.nextDouble();

        Employee e1= new Employee(name,empNo,salary);

        System.out.println("Employee Details: ");
        System.out.println(e1);
    }
}

[ujjwal18bit1167]

final class Immutable {
    private final String content;
  
    Immutable(String content) {
      this.content = content;
    }

    public String getContent() {
      return content;
    }
  }
  
  public class immutableMain {
    public static void main(String[] args) {
  
      Immutable obj = new Immutable("ShowBot");
      System.out.println(obj.getContent());

      obj = new Immutable("Ujjwal");
      System.out.println(obj.getContent());
    }
  }

[RohitN09]

package Week_3;

class ImmutableClass {
    private String name;
    private int rollNo;

    public ImmutableClass() {
        this.name = "Rohit";
        this.rollNo = 45;
    }

    public ImmutableClass(String name, int rollNo) {
        this.name = name;
        this.rollNo = rollNo;
    }

    public String getName() {
        return name;
    }

    public int getRollNo() {
        return rollNo;
    }

    @Override
    public String toString() {
        return "ImmutableClass [name=" + name + ", rollNo=" + rollNo + "]";
    }

}

public class ImmutableDriver {
    public static void main(String[] args) {
        ImmutableClass info1 = new ImmutableClass("Manas", 30);
        System.out.println(info1.getName());
        System.out.println(info1.hashCode());

        ImmutableClass info2 = new ImmutableClass();
        System.out.println(info2.getName());
        System.out.println(info2.hashCode());

        info1 = info2;
        System.out.println(info1.hashCode());

    }
}