Skip to main content

Encapsulation(what is the need?)

Let's try to generate the need of encapsulation.

For an instance, When money is in the Bank, It is secured. Bank takes responsibility and provides security for our money.
But If we have withdrawn that and carried in a bag, Now It can be snatched. Same happens, when we create an application. The database takes responsibility and provides security to our data. But when our application access data from the database and stores in the variable, Now It can be theft.

Data should not travel openly. Must have a container to wrap that same as In the real world(from this point you should know that how a real-world object will be defined in a program),
If I am an object of the Human class, with variables

  • name: "foo"
  • height: 5.8
  • color: "fair"

Nobody can know my name by just looking at me without asking. So now name became secured. To wrapping up data like this in a class is called Encapsulation.

In code:
class Human{
    var name = "foo";
    var height = 5.8;
    var color = "fair"

    public static void main(String[] args){

        Human object1 = new Human();
In the code you must do like then you'll get the name.

Even data became secured from other objects also. For an instance, If  I will workout, I'll get the Muscular body, not my neighbor. In the same way, If one object changed it's variable's value, the variable will not be changed for any other objects except this. i.e variables and functions of one object cannot be accessed by other objects, and it just because of Encapsulation.

for example(in code):
class Human{
    var name;
    var height;
    var color;
    var weight;

    public Human(String name, float height, String color, float weight){

        name = name;
        height = height;
        color = color;
        weight = weight;

    public void workout(){

        weight = weight + 5;

    public static void main(String[] args){

        Human object1 = new Human("foo", 5.7, "fair", 70);
        Human object2 = new Human("bar", 5.9, "fair", 70);
        // object1 did workout, object2 not
        System.out.println(object1.weight) // 75
        System.out.println(object2.weight) // 70


  1. Vampires in the Enchanted Castle casino - FilmFileEurope
    Vampires in the Enchanted Castle Casino. Vampires in the Enchanted Castle replica retro jordans Casino. Vampires in หารายได้เสริม the Enchanted Castle 먹튀 검증 커뮤니티 Casino. Vampires in the Enchanted Castle 바카라 양방 사이트 Casino. Vampires Air Jordan 6 Retro in the Enchanted


Post a Comment

Popular posts from this blog

Why "F" and "L" suffix | (10.0F, 10L)

Let us take it this way, We will create their needs. So we will get why they are needed. Try to guess, which functions will be executed in the following program: public class MyClass {     public static void main(String args[]) {         MyClass obj = new MyClass();         obj.fun1(10);     }     void fun1(byte val){         System.out.println(val);     }     void fun1(int val){         System.out.println(val);     }     void fun1(float val){         System.out.println(val);     }     void fun1(long val){         System.out.println(val);     }     } It seems like every method is capable to run this program because 10 is still literal because It has no data type. Before Java, In previous technologies, this scenario gave an ambiguity error. But Java solves this problem by removing the concepts of literals. It means Java provide a data type immediately when these born. So here 10 is no more literal. Java provides Integer data type for it. So now it is of Integer t

Promises and Async-await in depth : Asynchronous Programming in Javascript

Promises and Asynchronous Programming One of the most powerful aspects of JavaScript is how easily it handles asynchronous programming. As a language created for the Web, JavaScript needed to be able to respond to asynchronous user interactions such as clicks and key presses from the beginning. Node.js further popularized asynchronous programming in JavaScript by using callbacks as an alternative to events. As more and more programs started using asynchronous programming, events and callbacks were no longer powerful enough to support everything developers wanted to do.  Promises  are the solution to this problem. Promises are another option for asynchronous programming, and they work like futures and deferreds do in other languages. A promise specifies some code to be executed later (as with events and callbacks) and also explicitly indicates whether the code succeeded or failed at its job. You can chain promises together based on success or failure in ways that make your code easier t

Swagger File | Devise Token Auth

openapi : 3.0.1 info : title : API consumes : - application/json produces : - application/json servers : - url : http://localhost:3000 schemes : - "https" - "http" paths : "/auth" : post : summary : User registration requestBody : content : application/json : schema : $ref : "#/definitions/UserRegistrationParameters" responses : "200" : description : "Valid input" content : application/json : example : status : 'success' data : email : "" uid : "" first_name : "testuser2" last_name : "lname" role : "ABA Admin" "422" : description : "Invalid input"