Learn Java by Example: Java Program to Create a immutable class

Java Program to Create a immutable class

In this example, we will learn to create an immutable class in Java.


Example: Java program to create immutable class

final class Immutable{

  private String name;
  private int date;

  Immutable(String name, int date) {

    // initialize the immutable variables
    this.name = name;
    this.date = date;

  // private getter methods
  public String getName(){
    return name;

  public int getDate(){
    return date;


class Main{
  public static void main(String[] args){
    // create object of Immutable
    Immutable obj = new Immutable("Programiz", 2011);

    System.out.println("Name: " + obj.getName());
    System.out.println("Date: " + obj.getDate());


Name: Programiz
Date: 2011

In Java, immutable classes are those classes whose values are not changed. To create an immutable class, here

  • class is declared final so it cannot be extended
  • class members name and date are private so cannot be accessed outside of class
  • does not contain any setter methods so outer class cannot change the class members
  • getter method returns the copy of class members
  • class members are initialized using the constructor



Python Example for Beginners

Two Machine Learning Fields

There are two sides to machine learning:

  • Practical Machine Learning:This is about querying databases, cleaning data, writing scripts to transform data and gluing algorithm and libraries together and writing custom code to squeeze reliable answers from data to satisfy difficult and ill defined questions. It’s the mess of reality.
  • Theoretical Machine Learning: This is about math and abstraction and idealized scenarios and limits and beauty and informing what is possible. It is a whole lot neater and cleaner and removed from the mess of reality.

Data Science Resources: Data Science Recipes and Applied Machine Learning Recipes

Introduction to Applied Machine Learning & Data Science for Beginners, Business Analysts, Students, Researchers and Freelancers with Python & R Codes @ Western Australian Center for Applied Machine Learning & Data Science (WACAMLDS) !!!

Latest end-to-end Learn by Coding Recipes in Project-Based Learning:

Applied Statistics with R for Beginners and Business Professionals

Data Science and Machine Learning Projects in Python: Tabular Data Analytics

Data Science and Machine Learning Projects in R: Tabular Data Analytics

Python Machine Learning & Data Science Recipes: Learn by Coding

R Machine Learning & Data Science Recipes: Learn by Coding

Comparing Different Machine Learning Algorithms in Python for Classification (FREE)

Disclaimer: The information and code presented within this recipe/tutorial is only for educational and coaching purposes for beginners and developers. Anyone can practice and apply the recipe/tutorial presented here, but the reader is taking full responsibility for his/her actions. The author (content curator) of this recipe (code / program) has made every effort to ensure the accuracy of the information was correct at time of publication. The author (content curator) does not assume and hereby disclaims any liability to any party for any loss, damage, or disruption caused by errors or omissions, whether such errors or omissions result from accident, negligence, or any other cause. The information presented here could also be found in public knowledge domains.