DEV Community: Akash

Why JAVA over any other language ?

Akash — Fri, 26 Jun 2026 09:05:02 +0000

Java is object-oriented programming language used in backend development,used to build applications, especially backend systems, Android apps, enterprise software, and web applications.

=> why JAVA?

Large ecosystem
Strong OOPS
Mostly used in companies for backend
Platform independent
large-scale backend systems

=> Topics included in Java

OOPS
To write reusable, organized, real-world software.
Array & string
To store and manipulate multiple values and text.
Control Statement
To control program flow and create logic.
Packages
To organize large Java projects.
Exception handling
To handle runtime problems without crashing programs.
Collection Framework
Real applications store and manage large amounts of data.
Multi threading
To perform multiple tasks simultaneously.
Java Memory concept
To understand how Java manages memory.
Frameworks
Because companies always used pre written CODE for thier beneficial
instead of writing everytime .

=> Scope for JAVA in future

Many companies using java as backend for thier benefits,why because they have already written code instead of writing from scratch they use a thier existing code so they prefer java as thier backend language.
Java is Stable and reliable
Java is strong for performance

=> Technologies in java

Core java foundation
JBDC (Java Database Connectivity)
Spring Framework
Android Development
Microservices Technologies
Advanced Java Concepts

Justifying JAVA is OOPS

Akash — Thu, 25 Jun 2026 08:22:30 +0000

1.Java is a object oriented programming language(OOPS) why because it designed based on the concept classes and objects.

In java many programs created by defining a objects and classes.

          Class → Blueprint
          Object → Real thing created from the blueprint

=> Purpose of using OOPS

we can Write code once and use it many times by using inheritance.
We can protect Data by Hiding important data using encapsulation.
Divide a big program into smaller classes and objects.
Easy Maintenance
Better Security
Supports large Applications

=> justification of OOPS

Class
It is a blueprint or Template of Object
Object
It is a combination of States and Behaviour
Also it is a real or physical world entity

3.Inheritance

An object of one class acting as an object of another class

=> Paradigm in java

java supports paradigm also it supports multiple paradigm classifications of paradigm in java

Object-oriented paradigm -Built in around Classes and object
Procedural Paradigm-can use methods and functions
Functional programming paradigm -Uses expressions like (Lambda Expression,streams API

=> Pillars of OOPS

Encapsulation
Inheritance
Abstraction
Polymorphism

Java's Basic Architecture and confirming java is case sensitive language

Akash — Wed, 24 Jun 2026 08:57:41 +0000

JAVA
A code written by programmer in high level language and it converts into byte code with helps of JDK (Java Development Kit ) process known as compilation .
JRE (Java Runtime Environment) environment needed to run Java programs JVM (Java Virtual Machine) executes Java bytecode

 1.public class Game
{

public static Void main(String[] args)
{
    System.out.println("Hello world from java program");
}

}

 2. public class Game
{

public static void main(String[] args)
{
    System.out.println('Hello world from java program');
}

}

![ ](https://dev-to-uploads.s3.us-east-2.amazonaws.com/uploads/articles/emv1u4sqm0ejtz0s7n8t.png)

public class Print
{

public static void main(String[] args)
{
    System.out.println("Hello world from java program");
}

}

public class Game
{

public static void main(String[] args)
{
    System.out.println("Hello world from java program")
}

}

public class Game
{

public static void main(String[] args)
{
    System.out.println("Hello world from java program");
}

Python Exercises

Akash — Tue, 16 Jun 2026 08:41:44 +0000

=> Finding Power

To find the power of a number using a loop in Python, you multiply the number repeatedly.

def find_power(base,power):
   result=1
   while power>0:
      result=result*base
      power-=1
   return result
result=find_power(1,2) 
print(result)

OUTPUT:

=>Armstrong Number

An Armstrong number is a number where the sum of each digit raised to the power of the number of digits equals the original number.

def find_power(base, power):
    result = 1
    while power > 0:
        result = result * base
        power-=1

    return result
def count_of_digit(num):
    count = 0
    while num > 0:
        num = num // 10
        count+=1
    return count
num = 153
og_num=num
digits_count = count_of_digit(num)
armstrong = 0
while num > 0:
    rem = num % 10
    result = find_power(rem, digits_count)
    armstrong = armstrong + result
    num = num // 10

print(armstrong)

if og_num == armstrong: 
    print(" Armstrong Number")
else:
    print("Not Armstrong")

OUTPUT:

useReducer Hook

Akash — Tue, 09 Jun 2026 07:40:13 +0000

useReducer is a React Hook used to manage complex state logic.
Also it is used as alternative for useState,useReducer is used to make a cleaner and understandable code .

const [count, dispatch] = useReducer(reducer, initialState);

1.Count-current state
2.Dispatch-function

Creating Quiz Application

Akash — Wed, 03 Jun 2026 09:11:54 +0000

Create Components

App.jsx
Home.jsx
Question.jsx
Result.jsx

=> In App.jsx

Create a global variable for use variable in all other components
Also Create BrowserRouter for nagivate from on component to another Component
Import essentials components where it needed to implement program
also import Question .json file here i import in assests in src folder

=> Home.jsx

=> Question.jsx

=>Result.jsx

Python Looping Mathematics

Akash — Sat, 30 May 2026 05:29:40 +0000

=> Python Looping Mathematics Helping Factors
1.Prime Numbers

Prime number is a number greater number that has exactly two Factors (e.g) 1,2,5,7,

2.Factors

A number that divides another number without leaving a remainder. (e.g) 1,2,3,4,6,12

3.Least Common Multiple

Smallest common multilple of two numbers

(e.g) 4 and 6
4->4,8,,12,16,20
6->6,12,18,24
here least common multiple is 12.

OUTPUT:

4.Greatest Common Factor

A largest number that divides both numbers

(e.g) 12 and 18
12->1,2,3,4,6,12
18->1,2,3,6,9,18
here common factors are 1,2,3,6

5.Perfect Number
Perfect number is equals to sum its factors

(e.g) 6
1,2,3,6 are factors of 6
1+2+3=6
so,6 is a perfect number

OUTPUT:

useContext and useNavigate

Akash — Fri, 29 May 2026 06:00:59 +0000

=>USECONTEXT

It is a React Hook used to share data between components without passing props manually at every level.
Used to solve Props Drilling

=> USENAVIGATE

useNavigate is a React Router hook that lets you navigate between pages using JavaScript code.

1.Login Scenario

OUTPUT:

2.Logout Scenario

OUTPUT:

3.Namesharing Scenario

OUTPUT:

4.ButtonNavigation Scenario

OUTPUT:

5.Back Navigation Scenario

OUTPUT:

Looping in python

Akash — Wed, 27 May 2026 08:39:47 +0000

A priest took flowers from his garden and he used half of flowers he had for prayer while he visiting 7 temples in a row after visiting 7 temples he went home with 1 flower.find how many flowers he plucked from his garden?

OUTPUT:

2.Tenali Raman said if you let me to see king he will definietly give me a reward and he offered securities if they let him in he give half of his rewards to them,after seeing tenali king gets angry and punish him with 512 beats if he give half of his beats to securities how many securities he passed to meet king?

OUTPUT:

3.Two Train were ready to start journey from chennai to kanyakumari covering 30 stations A train stops after 3 stations,B Train stops after 5 stations now in which number of station B train driver meet A train driver ?

OUTPUT:

Comparison of Real DOM and Virtual DOM

Akash — Mon, 18 May 2026 17:11:15 +0000

DOM - Document Object Model
When a webpage loads browser converts html page into tree like structure is Called Dom => COMPARISON OF REAL DOM VS VIRTUAL DOM

*1. Real Dom *

A DOM created by browser is called Real DOM
It directly uploads the webpage
- Actual Browser Dom
- Re Render full part
- Slow updates
- Manipulation is expensive
- Can update HTML directly

(e.g)

HTML
 <h1> welcome </h1>

JAVASCRIPT
document.query selector("h1").
 innerText="welcome";

DEMERITS OF REAL DOM

It's Expensive
Slower in process
It affects perfomance

2. Virtual Dom

It is nothing but a lightweight copy of Real dom
React plays a major role in virtual dom
React creates a virtual version in
Memory
- Copy of real dom
- Faster updates
- Updates only changed parts
- Compares changes first
- Manipulation is easy and Not expensive
- Can't update HTML directly

How virtual dom works

1.Render

When state change React creates a new Virtual DOM tree

2.Diffing

React compares the new Virtual DOM With old virtual DOM

3.Reconciliation

Only the parts that actually changed get updated in the Real DOM (TBD)

Why react using virtual dom ?

To improve performance of web application ,when app's state changes it create new representation of UI And virtual dom only compares with previous one by diffing .

1.Faster Re-render
2.Smoother UI
3.Efficient memory

Basic Learnings in REACT

Akash — Thu, 14 May 2026 17:00:42 +0000

*1. React Components
*

Components are the building blocks of react app
Reusable pieces of UI => components classifications
Class Components
old method and feels heavy syntax difficult to write or read a code
Function Components
modern method and easy method also highly recommended
Replacing class components and reducing a burden of heavy code they introduced function components
```
function Greeting({name}){
return <h1>Hello,{name}!<h1>;}
```

2. JSX rules

JSX is a syntax extension lets you write like HTML code in JS

-> Must return a single root element
(able to use only one tag)
-> All tags must be closed
(e.g)

-> Use camelcase for attributes
(e.g) onClick
-> Javascript expressions in curly braces{}
-> NO statement inside JSX
-> Inline style use objects

*3.Folder Structure of REACT
*

Folder structure is nothing but how we organize for our file looks clean and easy to manage

-> public/

single html page where our entire react app lives

-> src/

Every component,pages,image,style files goes in it
also it is heart of our project

-> pages/

Each pages has different purpose and different URL

->assets/

It stores Image,Icons and Fonts that we used for our app

-> styles/

This folder holds our app css files to decide how our app looks
style includes app.jsx,app.css and index.js

-> node_modules

It contains third party library also packages app depends on
It usually large in size

-> package.json

It holds Important information about our project

*4.Difference between SPA and MPA
*
=> SPA (Single Page Application)

SPA loads only one page from server
React handles everything in browser
It doesn't reload
It just swaps content on screen (e.g) Gmail,Facebook

=> MPA (Multiple Page Application)

MPA loads new HTML page from server everytime you click link
Each page is a seprate file on server
Browser fully reloads everytime we click or navigate (e.g) Amazon

REACT IN JS

Akash — Thu, 14 May 2026 06:57:19 +0000

Today I learned about React,It is a open source javascript library formerly developed by Facebook now managing by (meta).
It Allow us to make reusable UI Components that manages its own state,more efficient and predictable .
React has HMR component,which updates changed modules instantly in browser .without reloading or refreshing a page
By react we develop a single page application
React runs in Node
MPA- Multiple Page Application
NPM- NODE Package Manager

Difference between Library and Framework

=> FRAMEWORK

Framework calls your code ,it's incharge for itself only thing we do is just plug our code in its structure
It calls the code whenever it wanted and when right time comes .

=> LIBRARY

Library is a code you call,In library you are in charge .we import our code and call by its function whenever we want
Also our code control id in flow

2.WHAT IS BUILT TOOL

Built tool it process our own code into Optimised file that browser can run ,Because browser doesn't understand JSX so built tool optimize it before it run .

=> BUILT TOOL IN REACT

VITE
Create react app/web pack (TBD)
Parcel (TBD)
Turbo pack (TBD)

1.VITE

Extremely fast
Currently it's popular among developers
Developer's go to for react projects
Also it has HMR (hot module replacement) Fixes changed modules in browsers instantly .