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Core Java Concepts: Serialization Serialization is defined as the process of converting an object into a sequence of bytes that can persist in a database or can be sent through streams. Serialization saves the state of objects for recreation without having to reprocess them on different platforms. Serialization is useful for storing, Transmitting the state Continue Reading »
What is currying? Currying is a technique of evaluating a function with multiple arguments, into a sequence of functions with a single argument. OR In other words, while a function, rather than taking all arguments at one time, takes the primary one and goes back to a new function that takes the second and returns Continue Reading »
The process of placing a list of items in a specified manner is known as Sorting. Some common criteria for sorting are alphabetical and numerical. It can be done in an ascending manner or in descending order. We all know that Collections.sort has the ability in sorting an arrayList for example, alphabetically if they are Continue Reading »
The Destructuring introduced new features of ES6.JavaScript provides a mechanism to handle the array and properties of objects in a much more innovative way. this mechanism is called destructuring. destructuring means implies a complex structure into the simpler parts. Destructuring allows us to extract multiple properties from an object or an Array. It is a Continue Reading »
Well, it has been noticed that all the primitive data types like int, float, double, etc in Java are dealt with differently. Even after the good performance offered by the primitive data types, there are circumstances when we might need an object representation of the primitive data type. Moreover, it has been witnessed that many Continue Reading »
A closure is a combination of a function bundled together (enclosed) with references to its surrounding state (the lexical scope). Lexical scoping The stance of a variable asserted in the source code denotes its scope in syntactic figuring. For example: let name = ‘John’; function greeting() { let message = ‘Hi’; console.log(message + Continue Reading »
Closures:- One of the greatest features in javascript is closures and it’s widely used but a little bit confusing term of javascript. So let’s understand what is closures. In simple words closures function are gives you access to an outer function from the inner function. We will start the fundamental term lexical scope known as Continue Reading »
Bug reports are a necessary part of any software development process. So it should be the responsibility of QA to make sure that bugs should be written in a totally understating form. How to write a Bug : The bug should be easy to understand as a technical person and non-technical both can understand it. Continue Reading »
Imagine you’re building a UI and you need to connect to an API. When you implement curl calls with the UI, it does not work. You then check the code, and everything seems to be fine. After changing the site or method, it appears that the HTTP call is working. It’s most likely that the Continue Reading »
Event Bubbling: In the event bubbling, an event starts at the most specific element and then flows upward toward the least specific element. For better understanding let’s take an example:-Suppose we have created a div inside the body tag and then we create a button inside that div. Let’s add the “Click” function on the Continue Reading »
Introduction SQL (Structured Query Language) may be a programing language that’s wont to conduct operations on database records, like updating, inserting, deleting, and creating and altering database tables and views. SQL may be a command language instead of a database system. Assume you would like to use the SQL language to run queries on the database’s data. Any direction system, like Oracle, MySQL, MongoDB, PostgreSQL, SQL Server, DB2, and others must be Continue Reading »
In this article, we will discuss what are pure functions in javascript? What are pure components? When to use pure components in React and when not to use them? What is the difference between Pure components and class and functional components? What are the advantages of pure components over others? When a function is called Continue Reading »
HealthKit is a framework that is provided by apple that helps us in getting and managing user health-related data in a very easy and convenient way. We can integrate HealthKit in any application just by a grant the application to get access to the HealthKit data. so, the user data was easily available to that Continue Reading »
When we mention common programming languages, it’s necessary to remember Java! Actually, it’s the most common programming language in the world with around seventy lakh Developers using it Regularly. One among the explanations for this can be the versatile nature of Java. Be it desktop apps, mobile apps, or web applications, you name them and Continue Reading »
When you create a class, you may create an object for that particular class and once we execute/terminate the program, the object is destroyed by itself (Garbage Collector thread). What happens if you want to call that class without re-creating the object. In those cases what you do is that, we use the serialization concept Continue Reading »
Ehcache is an open-source, standards-based cache for boosting performance, simplifying scalability and offloading your database. EhCache is used to improve performance by reducing the load on underlying resources. It can also be used for RESTful server caching, application persistence, and distributed caching. In simple words, cache means a store of things that will be required Continue Reading »
In this tutorial will discuss about Hibernate Query Language. HQL is an object-oriented query language. Hibernate Query Language(HQL) is same as Structured Query language(SQL), except that in HQL we use entity class name instead of table name. HQL provides its own syntax and grammar Ex. From Employee emp . Where Employee is an entity class Continue Reading »
Welcome to the tutorial of Functional Interface and Lambda expression. In this tutorial we will discuss fundamental concept of functional interface and lambda expression. Functional Interface : Functional Interface is just a interface with one abstract method, but it can have any number of default and static method. Runnable and Comparable interface are the Continue Reading »
What is Spring Boot? What is Spring Framework? What are their goals? How can we compare them? There must be a lot of question in your mind. We will discuss each and every question here. At the end of blog you will get to know about all these questions. There is one interesting fact that Continue Reading »
Amazon S3 (Simple Storage Service) is a storage service provided by AWS (Amazon Web Services). We can use S3 to store and retrieve any amount of data on the web world-wide. To know more about this service, you can refer to the official documentation of AWS S3 from here. This tutorial will show you, how Continue Reading »
AOP framework is one of the key components of the Spring framework. AOP provides a facility to enable middleware services with the Spring application in a loosely coupled manner. Middleware services are the additional services that makes our application to be executed in a stable manner in all the situations. Middleware services can be Continue Reading »
Spring Data JPA is not a JPA provider but is a specification. It is a library / framework that adds an extra layer of abstraction on the top of our JPA provider. It simply “hides” the Java Persistence API (and the JPA provider) behind its repository abstraction. JPA is the sun specification for persisting Continue Reading »
JasperReports is an open source reporting engine. It provides ability to deliver rich content onto to the printer, the screen, or into various formats such as PDF, HTML, XLS, RTF, ODT, CSV, TXT and XML files. It is a Java library and can be used in a variety of Java-enabled applications to generate dynamic content. Continue Reading »
Why we use Log4j ? Log4j is used for logging. Logging is the process of writing log message in any file, db,console etc( any central place). If we use SOP (System.out.print() ) statement to print the log message then we can have some disadvantage : 1. We can print log message on console only. So Continue Reading »
Spring Batch Spring Batch is a processing framework designed for robust and parallel execution of multiple job. It follows the standard batch architecture in which a job repository takes care of scheduling and interacting with the job. Spring Batch Job Spring batch job reads input data, processes the input data, and writes the processed data Continue Reading »
JSONExport: Now you do not need to Understand your JSON Structure and create your model manually. Here is a utility to convert your JSON into model to do that. You just need to paste your JSON in JSON field. First it will check it JSON is valid, then convert it into model. It will create different Continue Reading »