Jewel Chowdhury, Author at Codesnipeet

Java null pointer exception

Today we will learn, What is a NullPointerException, and how do I fix it? So, let’s start: What is NullPointException NullPointException is a RunTimeException. NullPointException is thrown when the value…

Jewel Chowdhury July 6, 2021

React Js Bugs

How to send the authorization header using Axios

Axios is mostly used javascript promise-based HTTP client for end-to-end requesting resources from the serve side application. Generally, in simple application we don't have to put the header for any…

Jewel Chowdhury July 2, 2021

React Js Bugs

How to cancel all subscriptions and asynchronous tasks in a useEffect cleanup function?

Even if the component is unmounted, useEffect will try to maintain contact with your data-fetching function. Because this is an anti-pattern that exposes your app to memory leaks, canceling your…

Jewel Chowdhury July 2, 2021

Interview Questions

What is the difference between public, protected and private in Java?

Public, Private and Protected are called access modifier in java. This are the reserved keyword in java. They are defined the access of the classes and interfaces. And when one…

Jewel Chowdhury June 21, 2021

Interview Questions

What are the differences between HashMap and Hashtable in Java?

Hashtables and HashMaps are both used to store data in key-value pairs. To store unique keys, both use the hashing approach. However, there are numerous distinctions between the HashMap and…

Jewel Chowdhury June 21, 2021

Java Java Basic

Operators in Java Explained

Operator are those who performs an action, for example + is an arithmetic operator that perform addition. They are various types of operators are available in java programming language. Types of…

Jewel Chowdhury June 20, 2021

Java Java Basic

Data Types in Java Explained

In Java, data types refer to the type of data that can be stored in variables. Because Java is a tightly typed language, you must define the datatype of variables…

Jewel Chowdhury June 20, 2021

Java Java Basic

Variables in Java Explained

A variable is a term that refers to a value that can be changed in the future. When I put int i=10, for example, the variable name is I and the value…

Jewel Chowdhury June 20, 2021

Interview Questions

Define class loader and its type in java

Java class loader is mainly responsible for loading java classes during runtime dynamically to the Java Virtual Machine(JVM). Classloader is a subset of JVM, responsible for loading the class files.…

Jewel Chowdhury June 18, 2021

Interview Questions

Differences between Exception and Error in java

java.lang.Error and java.lang.Exception both are subclass of java.lang.Throwable class. You can not recover error but you can recover exception by using try-catch block. Errors are mostly caused by the environment…

Jewel Chowdhury June 18, 2021

Java Java Basic

Java Hello World Program

We’ll learn how to write our first Java program throughout this post. This article is only for java beginners. hello world program will be a very simple program that will…

Jewel Chowdhury June 14, 2021

Java Java Basic

Difference between JDK vs JRE vs JVM

Table of contents What is JDKFeatures of JDKWhat is JREFeatures of JREWhat is JVMMain Task of JVMFeatures of JVM What is JDK JDK is the acronym of JAVA Development Kit. JDK…

Jewel Chowdhury June 14, 2021

Java Java Basic

Introduction to Java Programming Language

Java is one of the most used programming languages in the world for developing desktop application and web application. What is JAVA? Java is a platform independent, object oriented programming…

Jewel Chowdhury June 14, 2021

Laravel Advanced Tutorials

How to Read XML File in Laravel 6,7,8

Let's have a look at an example of how to read an xml file in Laravel. I'll show you an example of laravel reading an xml file. We'll discuss about…

Jewel Chowdhury June 14, 2021

Laravel Advanced Tutorials

Google Recaptcha V3 Example Tutorial in Laravel 8

Hello buddies, How are you guys? Today I am going to show you how to add google Recaptcha to your laravel web application. Let's look at an example of integrating…

Jewel Chowdhury June 14, 2021

Laravel Advanced Tutorials

Laravel 8 REST API Authentication with Sanctum

Hello buddies, Today,I will learn you how to use sanctum api authenticationin laravel 8. We will Show example of sanctum api authentication in laravel 8. It's a small example of…

Jewel Chowdhury June 14, 2021

Java Advanced Uncategorized

What is a serialVersionUID and why should I use it?

Serialization Serialization allows to convert an object to a stream, for sending that object over the network OR Save to file OR save into DB for letter usage. serialVersionUID It is…

Jewel Chowdhury June 14, 2021

Guides

How do I efficiently iterate over each entry in a Java Map?

Solution Using iterator and Map.Entry long i = 0; Iterator<Map.Entry<Integer, Integer>> it = map.entrySet().iterator(); while (it.hasNext()) { Map.Entry<Integer, Integer> pair = it.next(); i += pair.getKey() + pair.getValue(); } Using foreach…

Jewel Chowdhury June 5, 2021

Bugs

How do I import an SQL file using the command line in MySQL?

I have a .sql file with an export from phpMyAdmin. I want to import it into a different server using the command line. I have a Windows Server 2008 R2 installation. I placed the .sql file on…

Jewel Chowdhury June 5, 2021

Guides Java

A JNI error has occurred, please check your installation and try again problem fix 2021

Hi, This is a common problem when you want to run a java program using the command line. The problem is occurring for so many reasons. Most of the cause…

Jewel Chowdhury May 25, 2021