Top 10 Free Blockchain Courses For Beginners to Learn in 2024 - Best of Lot

Hello guys, if you want to learn Blockchain technology and become a Blockchain developer in 2024 and looking for best online resources like books, online courses and tutorials then you have come to the right place. Earlier, I have shared best Blockchain course and Blockchain certifications as well best places to learn Blockchain and books to read and in this article, I Am going to share best free online courses to learn Blockchain in depth. But, Before we get into the top 10 courses that will teach you all about blockchain, let me tell you what it really is. Blockchain is basically a method of recording information that makes sit really impossible to hack that system and steal that information. It is actually a duplicated ledger that duplicates and distributes transactions across a network of computers.

Top 5 Websites To Learn Web Development in 2024 - Best of Lot

Hello guys, if you want to learn web development and looking for online resources like books, online courses, projects, and tutorials then you have come to the right place. Earlier, I have shared best web development courses, books and projects and in this article, I am going to share best websites to learn Web development online  in 2024. But, before we get to the best websites to learn about web development out there, let me tell you a little bit about what web development really is. Web Development basically refers to all the tasks associated with developing websites that are hosted on the internet. The process of web development can also include web design, web content development, client-side scripting, server-side scripting, and network security configuration.

How to Join Two or More Tables in a SQL query? Left Join Example Leetcode Solution

Hello guys, when it comes to combining two tables in SQL, many programmers don't know that they can use the JOIN clause. In fact, JOIN is there to fetch data from multiple tables together. There are mainly two types of joins, INNER Join and OUTER join. On Inner join, only those records have matching values in both tables, while in Outer join, all records from one table are selected in addition to matching records from other tables. There are two kinds of Outer join in SQL, LEFT OUTER JOIN and RIGHT OUTER JOIN. Both are actually the same thing, which means you can get the same result by using either of the outer joins by changing the table's position from left to right.

How to create RESTful Web Services in Java using Spring Boot? Example Tutorial

Hello guys, if you are looking for a complete tutorial to create REST API on Spring Boot then you have come to the right place. In the past, I have shared the best RESTful Web Services courses and best Spring Boot courses and in this article, I am going to show you how to create RESTful web services using Spring Boot step by step. After going through this tutorial you will be able to create your own REST endpoints and RESTful application using Spring Boot and Spring Framework and Java programming language. How to make Spring boot REST API? is a common question that everyone has who is new to Spring boot application development. 

What is Spring Expression Language (SpEL)? Difference between $ and # in @Value expressions Example

Hello Java programmers, if you are wondering what is Spring Expression Language and how to use them in your Spring Framework or Spring Boot application then you have come to the right place. Earlier, I have shared the best Spring Framework courses, Free Spring Questions, Spring projects, and books, and in this article, I am going to teach you about Spring Expression Language with simple, easy-to-understand examples. The Spring Expression Language (SpEL for short) is a powerful language that supports querying and manipulating an object graph at runtime. The syntax is similar to Unified EL, but it has several more features, such as method calling and rudimentary string templating.

What is SRP or Single Responsibility Principle Example in Java? SOLID Design Pattern Example

Hello guys, if you want to learn about SRP or the Single Responsibility principle and wondering how to write code that follows SRP and what are pros and cons of following this design principle then you have come to the right place. Earlier, I have shared the best object-oriented programming and design courses and books and in this article, I am going to talk about SPR. The Single Responsibility Principles, popularly known as SRP is part of 5 Object-oriented design principles, introduced by Robert C. Martin, popularly known as Uncle Bob. The Single Responsibility principle says that "there should be one reason to change a class". This means a class should do only one thing, and do it perfectly.

Top 20 Mockito Interview Questions with Answers for Java Programmers

Hello guys, if you are preparing for Java developer interview then you must prepare for Mockito, one of the most popular mocking and unit testing library for Java developers. Mockito is used across all kind of companies, both big and small like startups for unit testing Java applications and that's why good knowledge of Mockito is required to crack the Java Interview. Along with JUnit, Mockito is quite important and if you are looking for Mockito Interview questions and answers then you have come to the right place. Earlier, I have shared best JUnit and Mockito courses and unit testing books, and even popular JUnit interview questions and in this article, I am going to share 20 common Mockito questions for your interviews.

Top 5 Online Courses For MCAT Medical College Admission Test in 2024 - Best of Lot

Hello guys, if you are preparing for MCAT Medical College Admission test in 2024 and looking for best resources for your preparation then you have come to the right place. In this article, I am going to share best online courses for MCAT medical college admonition test. But, Before we get to the 5 best courses that will teach you everything you need to know to pass the MCAT, let me tell you a little bit more about what it really is. MCAT, also known as the Medical College Admission Test, is basically an entrance examination for gaining admission into medical colleges in the United States, Australia, Canada, and the Caribbean Islands. The exam is regularly conducted by the Association Of American Medical Colleges, also known as AAMC, and administered by Pearson VUE. It is also conducted almost 25 times a year across 21 different countries.

Top 5 Websites to learn HTML for Web Development in 2024 - Best of Lot

Hello guys, if you are looking for best places to learn HTML for web development then you have come to the right place. Earlier, I have shared best free HTML courses and best paid HTML courses along with books, and in this article, I am going to share best places to learn HTML online in 2024. But, before I share you all these websites and platform let's first understand what is HTML itself and why you should learn it?  HTML or Hypertext Markup Language was created by Sir Tim Berners-Lee in 1991, but was officially released to the general public in 1995. HTML is the standard markup language which is designed to work with documents which are to be displayed in web-browsers. At its core, every single static thing that you see in a web browser is a HTML document.

Top 35 Python Interview Questions with Answers 1 to 3 Years Experienced Programmers

Hello guys, if you are preparing for a Python developer job and looking for some frequently asked Python interview questions then you have come to the right place. Earlier, I have shared the Complete Python Developer RoadMap,  best books and best courses to learn Python and in this article, I am going to share 35 Python questions, covering different concepts for Python developer interviews. Sitting in any interviews, especially in tech interviews, is a tough job itself. You can't go in without proper preparation. Even if you have taken or given dozens of interviews, it is always recommended to go through the quick preparation notes or concepts.

Top 20 CSS Interview Questions and Answers for 1 to 2 Years Experienced Web Developers

Hello guys, if you are preparing for web developer job interview and looking for common CSS Interview Questions then you have come to the right place. Earlier, I have shared HTML Interview questions and CSS Interview Questions and in this article, I am going to share 20 common CSS Interview Questions with answers. If  you have used CSS for a couple of months then most likely you know the answer of these CSS questions but if you struggle with any of them then you can always go back to these best CSS online courses to revise key concepts. I have tried to include as many questions as possible covering different CSS concepts but you can also contribute, feel free to ask questions on comments. 

Top 21 GraphQL Interview Questions and Answers for Beginners and Experienced Developers

Hello guys, if you are preparing for web developer interviews where GraphQL skills are needed and you are looking for frequently asked GraphQL Interview questions then you have come to the right place. Earlier, I have shared both Web development interview questions as well as REST Interview Questions and in this article, I am going to share 20 common GraphQL Questions from Interviews with answers. These questions covers essential GraphQL concepts like difference between REST And GraphQL and pros and cons of using GraphQL to consume APIs. If you have used GraphQL in past then you can easily answer these questions but if you forgot then you can always join of these best GraphQL online courses to learn and revise key GraphQL concepts.

Top 20 Machine Learning Interview Questions and Answers

Hello guys, if you are preparing for Machine Learning Interviews and looking for common Machine Learning questions then you have come to the right place. Earlier, I have shared 35 Python Interview Questions and 20 AI Interview Questions and in this article, I am going to share 20 Machine Learning Interview Questions with answers. If you have gone through a Machine learning course or have worked in Machine Learning for a few months then you should know answer to all of these questions but if you struggle to answer them then I suggest you to revise concepts by going through these best Machine Learning courses for beginners. They are great to learn and revise important Machine Learning concepts. 

10 Tools Cyber Security Professional and Pen Tester Should Learn in 2024

Hello guys, if you want to become a Pen Tester, Cyber Security Engineer or Ethical Hacker in 2024 and looking for the best tools then you have come to the right place. Earlier, I have shared best Cyber Security courses, free Pen Testing Courses, and Ethical Hacking courses and in this article, I am going to share best tools every Cyber Security Engineer and Pen Tester should learn in 2024 to do their job effectively. Suppose you become a penetration tester and learn the cyber security field. In that case, you need to know many tools that will help you scan the networks and system for vulnerabilities and other tools for exploring them. This article will provide you with the most used tools for finding these vulnerabilities and how to exploit them.

What is Generator Function in JavaScript? Example Tutorial

Hello guys, Functions are an essential part of JavaScript programming. Basically, a function is a piece of code that can take inputs and return outputs. Moreover, a function can be executed at any time and any number of times. When a regular function is called, it executes from top to bottom. Its execution ends when the function body ends or a return statement is encountered. But JavaScript provides a special kind of function that works in a different. These functions are called generator functions and they were introduced in ES6. In this article, we will discuss what are generator functions and how to use them with the help of an example. It's also a popular JavaScript interview questions, commonly asked to experienced developers.

Top 5 Courses For 70-461,761: Querying Microsoft SQL Server with Transact-SQL

Hello guys, if you are preparing for Microsoft SQL Server certification like 70-461 or 761 with Querying Microsoft SQL Server with Transact-SQL then you have come to the right place. In the past, I have shared both free SQL Server courses and paid SQL Server courses as well books and in this article I am going to share best online courses for SQL Server certification like 70-461 or 70-761. I know what all of you are thinking right now; yeah, that is a very long name for a certification exam. I get it. Don't worry, you will get through this, I promise. This is simply a certification exam that will test your ability in creating tables in a database and alter columns in a table. You should also be able to know what kind of data types to use in various circumstances. You should know how to use functions to manipulate string data values.

10 Example of SCP (Secure Copy) Command in Linux

Hello guys, in last few articles I have explained how to use netstat, curl, and lsof command in Linux and in this article, I am going to share how to use SCP command in Linux to copy files and directory from remote host. Similar to SSH, its one of the essential command for any Java Programmer or IT professional as most of the time you will need to transfer data between servers and then you will need either SCP, SFTP, or rSync. The scp is another essential command for Linux user which allows you to copy files and directory from one server to another in a Linux network. It is based upon SSH and behave similarly in terms of authentication and logging but allows you to copy a file or directory from remote server. 

Top 30 Gradle Interview Questions with Answers for Java Developers

Hello guys, if you are preparing for Java developer interview then you must have come across Gradle, a Groovy based build tool which is gaining popular with Java community. While its not mandatory to learn Gradle for Java Interview if the job description mention Gradle or Groovy then you should prepare Gradle is one of the essential tool for Java developers. It's similar to  Maven and ANT, two other popular build tool for Java project but offers several advantages which I have explained in Maven vs Gradle post earlier.  These Gradle questions are good for both beginners and Java developer with 1 to 3 years of experience which are using Gradle in their project or expecting Gradle question on Java Interview.

Difference between -Xms and -Xmx JVM Parameters forJava Heap Memory

Though both -Xms and -Xmx JVM options are used to specify the size of heap memory, main difference between them is that -Xms is used to specify initial heap memory while -Xmx is used to specify the maximum heap memory. The JVM (Java virtual Machine) provides several command line arguments to specify size of different memory areas, also known as generations of Java Heap space, but two of the most useful JVM parameters which specify initial and maximum heap memory is -Xms and -Xmx. When you start JVM by using java command you can specify the maximum heap size with the JVM option -Xmx and a size e.g. java -Xmx1G MainClass will start JVM with maximum heap size of 1 giga bytes. Remember there is no space between -Xmx and size, if you leave space e.g. -Xmx 1024M then JVM will throw invalid heap memory error, so be careful there. 

How to declare a method which takes a lambda expression in Java 8? Example Tutorial

You may have seen lot of examples of how to use lambda expression in Java 8 e.g. to replace anonymous class, to implement Runnable or to implement Comparator but there are hardly any examples of teaching you to how to declare your own user defined method which can accept lambda expression. In this tutorial, I will try to bridge that gap. Actually, a method doesn't know whether you are passing an instance or a lambda expression to it, all you need to remember is that lambda expression is of SAM type in Java 8. Which means, you can pass lambda expression in place of an interface which has just one abstract method. 

3 Maven Eclipse Tips for Java Developers

Hello guys, If you are using Maven inside Eclipse IDE via M2Eclipse plugin then the following tips can help you a lot. Maven is one of the essential tool for Java developers as it is used to build your application, compile your code, create packages which can be deployed into physical box or cloud. Apart from that Maven also provide dependency management feature which means you don't need to manually download JAR file and add into your classpath. You just specify which library your code is using and the version and Maven will automatically download correct JAR file for you and put in your local Maven repository. Maven can also manage transitive dependency which means suppose your code is depend on Spring Framework which itself need 10 more open source library to work. With Maven you just need to specify which version f spring framework you want to use, and it will download all the library needed by Spring automatically.  In nutshell, Maven makes Java development easier and every Java developer should learn it. 

Top 21 Maven Interview Questions with Answers for Java Programmers

Hello guys, if you are preparing for Java developer interviews then you should not ignore Maven as its on of the important build tool for Java developers. Most of the Java projects you are going to work will use Maven for building artifacts and deploying into both Physical machine and cloud. If you already know the importance of Maven and looking for frequently asked Maven interview questions then you have come to the right place. Earlier, I have shared 130+ core Java questions, Spring Boot questions, Hibernate Questions, and even JUnit questions for thorough preparation and in this article, I am going to share 20 common Maven questions from Java interviews with answers. 

10 Free Online Courses To Learn Cloud Computing in 2024 - Best of Lot

Hello guys, if you want to learn Cloud Computing concepts with AWS, Azure, or Google Cloud Platform and looking for resources like online courses, books, and tutorials then you have come to the right place. Earlier, I have shared best Cloud Computing Books and best Cloud Computing online courses and in this article, I am going to share best free courses to learn Cloud Computing in 2022. But, Before we get to the 10 best free courses that will teach you everything you need to know about cloud computing, let me tell you what cloud computing really is.

Maven vs Gradle? Which one Java Developer Should Learn?

Hello guys, if you are looking for a quick introduction to Maven and Gradle then you have come to the right place. Earlier, I have shared the best Maven course and best courses to learn Gradle, if you haven't checked them, I suggest you can also look at them if you want to learn these tools in depth. Maven and Gradle are the two most popular build tools for Java applications. They manage dependencies and create artifacts.  How do they do that? They have a repository like a maven has Maven repository where the store every single Java library and depending upon which library you add to your project, they download that library + all the transitive dependency for those libraries automatically. 

how to fix the password issue for Maven in Eclipse? [Solved]

Most Java programmers use Maven in Eclipse via the M2EClipse plug-in, which gives one capability to build, run, and test Java application using Maven. I also use the M2Eclipse plugin for integrating Maven with Eclipse, but more often there are issues dealing with them like Maven not able to find certain archetypes, or maven not able to download Jar files from remote maven repository. Since I need to change the password often for security reasons like every 3 months, I do see a lot of maven issues in Eclipse related to building projects. Most of the time these are compilation errors that are caused because maven is not able to connect to remote maven central repository, even though you have updated password in settings.xml in the maven installation folder like C:\apache-maven-2.2.1\conf\settings.xml. 

Difference between Inheritance and Polymorphism in Java and OOP - Example

Both Inheritance and Polymorphism are key OOP concepts and similar to Abstraction and Encapsulation, they are also closely related to each other. Because of their similarities, many OOP programmers, especially beginners get confused between Inheritance and Polymorphism. Even though they are closely related and you need Inheritance to support runtime Polymorphism they are a totally different concept. Inheritance refers to the ability of classes or objects to inherit properties of other classes or interfaces. It means you can write code for common functionalities and reuse it at different places by just using Inheritance and not re-writing those codes again and again. For example, you can write code to

How to use for loop in Linux? Looping through List, values, and range in Bash with Example

If you know how to use for loop in bash shell or Linux, you can speed up a lot of task, saving precious time while doing support or troubleshooting in Linux. One of my favorite use of for loop is repeating same task among multiple host. For example, If I have to clean up some files from 10 hosts in the network, instead of manually going and removing files from individual host, you can use for loop and ssh command to automatically remove old log files from all the host, without manually logging into them. This is a tremendous time saving trick if you are working for an application which is running on more than one host. It's a life-saver if your application is running on 30 to 40 hosts. 

Top 20 Kotlin Interview Questions and Answers for Java developers

Hello guys, if you are preparing for Kotlin Developer Job interview and looking for frequently asked Kotlin interview questions then you have come to the right place. In the past, I have shared Core Java questions, Scala interview questions as well as Groovy Questions and in this article, I am going to cover common Kotlin questions from interviews. In last a couple of years Kotlin has emerged from the shadow of Java and demand for Kotlin is increasing day by day. Google's decision to accept Kotlin as the official programming language for Android development triggered this rise and now Kotlin is also viewed as preferred backend development language, a shock for Java and Scala but its true. 

How to use Mockito to Unit test Java Program with JUnit? Example Tutorial

Hello guys, if you are writing unit test your Java application then you would have definitely come across JUnit and Mockito, two of the essential unit testing framework  for Java developers. While JUnit offers support to run your test, setup and teardown and also assertion to check the expected and actual output. Mockito complements JUnit by offering you a mock based testing approach. Mock is nothing but a test double which can return a configured value when a certain method is called. It also provides ability to check if a particular method is called or not. By using Mock object or test double you can check if your code is behaving properly or not in different scenarios. This is also the key difference between JUnit and Mockito, JUnit provides infrastructure to run your test while Mockito provide infrastructure to created Mock objects. 

How to check if Checkbox is checked in JQuery? Example Tutorial

Hello guys if you are wondering how to check if a checkbox is checked using jQuery then you have come to the right place. Earlier, I have shared, how to check/uncheck checkbox or how to find all unchecked checkboxes using jQuery and in this article, I will share how to check if a particular checkbox is checked or not. While working in Java web application front end, written using JSP, HTML, CSS, and JavaScript, we often need to check status of checkbox e.g. whether a particular checkbox is checked or not? One example of this is checking is checking, whether user has accepted terms and conditions before submitting form. Thankfully, JQuery provides a nice and easy way to find status of checkbox. 

Difference between JPA, Hibernate, and MyBatis in Java

Hello guys are you tired of using plain old SQL to access your database? Are you looking for a better way to manage your database interactions in Java? Well, you're in luck because JPA, Hibernate, and MyBatis are here to save the day! If you're a Java developer, you've likely come across the terms JPA, Hibernate, and MyBatis when working with databases. While they all deal with object-relational mapping (ORM), they have their own distinct approaches and features. Understanding the differences between them can help you make informed decisions when choosing which one to use for your projects.

Coursera IBM Full Stack Cloud Developer Professional Certificate Review

Hello guys, if you are looking for an online certification to become a full stack cloud developer then you will love this Professional certificate by IBM on Coursera. Almost no company in the world doesn’t have a website with databases and back-end to perform actions like registering users. These technologies require a team to build but no longer need a team to create a website as you only need one on the full-stack web developer. Full-stack web developer can create the front-end of the website, which is what the user see and interact with and the back-end represents the actions happening inside the website and also needs to learn making the databases. The nice thing is you can learn all of these in one course called IBM Full Stack Cloud Developer Professional Certificate specialization.

Coursera Review - Is IBM Technical Support Certification worth it?

Hello guys, if you want to join Coursera's IBM Technical Support Certification but not sure whether you should join it or not then you have come to the right place. In this article, we have reviewed this certification form learner point of view. IBM Technical Support Certification offered by Coursera is a comprehensive program designed to help learners acquire the necessary skills to provide technical support services to organizations. With a focus on providing high-quality training and hands-on experience, the program will teach you all the skills and knowledge required to provide effective technical support. 

Top 35 T-SQL and Microsoft SQL Server Interview Questions and Answers

Hello guys, if you are preparing for Java developer interview where Microsoft SQL Server is listed as mandatory and required skill or you preparing for a junior DBA role for Microsoft SQL Server and looking for common SQL Server interview questions for practice then you have come to the right place. Earlier, I have not only shared SQL Server courses for beginners but also 50+ SQL and Database Questions for programmers and DBA. You an also check them to get yourself familiar with generic SQL concepts like normalization, joins, aggregation, partitioning, indexing, and transaction along with these SQL Server specific questions which focuses mainly on T-SQL and SQL Server functionalities and how general SQL commands behave in Microsoft SQL Server. 

12 Examples of kubectl command in Linux

Hello guys, if you are working with Kubernetes pods like deploying your application, starting and stopping them by scaling to zero instances, while you just want to see logs or want to login into the Kubernetes pods itself, you must know how to use kubectl commands to do all these task. Since most of the companies, both big and small are using Kubernetes to deploy services on cloud, its imperative for Java developers and other Software developers to get familiar with the kubectl command. We deploy our Java Microservices on Kubernetes mainly because Kubernetes can start the services automatically when it goes down. We have different Kubernetes clusters for different environments like DEV, UAT, and PRODUCTION and I often switch between those cluster using kubectl commands to check the status of our Java services or interact with them.

5 Examples of df command in Linux

The df command is used to find the amount of disk space used and available on different partitions and file systems. The simplest example of df command is just typing df on console with out any arguments and it will show you the space used and available on all currently mounted file systems of all types e.g NFS, ext3 and both local and remote. Alternatively you can ask df command to print the size and space available and used for a particular partition. Normally the disk space is printed in units of 1024 bytes, but this can be overridden. I commonly use df -h option to print the size and disk usage in human readable format e.g. G for giga bytes, M for mega bytes and so on. 

How to Base 64 Encoding Decoding in Java 8 - Example Tutorial

Until Java 8, there was no standard way to Base64 encode a String in Java or decode a base64 encoded String. Java Programmers either use Apache Commons library and its Base64 class to encode or decode binary data into base 64 encoding, as shown here, or rely on internal Sun classes e.g. sun.misc.BASE64Encoder and sun.misc.BASE64Decoder(), which was not officially part of JDK and can be removed without notification. Java 8 solves this problem by providing standard support for base64 encoding and decoding by providing a java.util.Base64 class. 

How to recursively show all files in a directory and sub-directory in Java - Example

Hello, guys if you are looking for a Java program to recursively list all files in a directory or sub-directory in Java then you have come to the right place. Earlier, I have shared the best Java Programming courses and In this article, I will show you how you can use the SimpleFileVistor class from java.nio package to recursive list all files and directories inside a given directory. The API also provides you control over whether to list only files or directories when you are navigating recursively. This makes it very useful for archiving programs or creating build tools like Maven or any Java program which has to deal with files and directories. 

Solving ArithmeticException in Java? Integer and Floating point Arithmetic Example

I am starting a new series called Java Coding Quiz, in which I'll show you subtle Java concepts hidden in the code. This is an OCAJP or OCPJP style question but focused on teaching subtle details of the Java programming language. In today's puzzle, you will learn about one of the key concepts about how floating-point and integer arithmetic works in Java. This is a very important concept for any Java developer because Java behaves differently when the same operation is performed by different types of variables but of the same value.

How to use Comparable Interface in Java? compareTo() Example

Hello, guys, today I am going to talk about one of the fundamental concepts in Java, defining the natural ordering of the objects like lexicographical order for String and numerical order for Number classes like Integer, Double, Float, etc. The compareTo() method is defined in the java.lang.Comparable interface. It is used to define the natural ordering of an object, for example String class override compareTo() to define the lexicographical order for String objects. Integer class override compareTo() to define the numeric ordering of integer objects.

When to make a method final in Java? Example

Hello guys, if you are wondering when to make a method final in Java then you have come to the right place. Earlier, I have told you when to make a method static and when to make private and today, I will teach you when to make a method final in Java. The final keyword in Java is not as mysterious as volatile or transient, but still, it creates a lot of doubts in programmers' minds. I often receive questions like, When to make a method final in Java or When to make a method static in Java, later I answered in my earlier post. Questions like this are not trivial, knowing what a keyword does is just a small part of mastering that functionality. Similar to the real world, where knowing that a sword can cut a lot of things is not enough for a warrior to survive, you need to know how to use that and more importantly, use it effectively. 

Review - Is Certified Web3 Professional (CW3P) on 101 Blockchains worth it

The evolution of technology has shown us the volatile nature of change. The most hyped technological phenomenon of one decade is redundant in the next. When you take a look back at the first time the world was introduced to the internet, all you can find are static pages. Today, the talks about the internet stepping into the web 3.0 phase have been gaining momentum. A Certified Web3 Professional can make the most of the emerging career opportunities in this field. However, it is important to know what web 3.0 actually means and how it would affect your career choices. Here is an overview of a few reasons why the CW3P certification by 101 Blockchains is a relevant choice for you.

Review - Is Google Digital Marketing & E-commerce Certification worth it?

Hello guys, if you want to learn Digital marketing and e-commerce skill online and looking for best resources like book, online courses, and tutorial then you have come to the right place. In this article, I am going to introduce with Google's Digital Marketing certification on Coursera, which is is a great resource to learn Digital Marketing in 2023. If you don't know, Google's Digital Marketing & E-commerce Certification is a popular program that offers individuals the opportunity to gain essential skills and knowledge in the digital marketing industry. The certification covers a wide range of topics, including search engine optimization (SEO), pay-per-click (PPC) advertising, e-commerce, and more

Spring Hello World Example in Java using Dependency Injection

Hello All, In this Spring framework tutorial, you will learn how to write the hello world example in the Spring framework. This should be your first tutorial to start learning the Spring framework, as it gets the ball rolling. While coding and running this example, you learn a lot about the Spring framework, Spring XSD files, necessary JAR files, and more importantly how the Spring framework works. This HelloWorld program in Spring framework is an extension of the classical Java hello world program, which you might have seen earlier. This program is written using the Dependency Injection design pattern by using the Spring Frameworks' IOC container.  Even though now you can configure Spring dependency using annotations and Java configuration, this example uses a traditional XML way to configure dependencies.

How to use jQuery Class and Id Selector to find DOM elements? Example

One of the best things about jQuery is there selectors, which gives jQuery enormous power to find and select DOM elements so easily. If you are coming from JavaScript background then you might love those classical methods to find DOM elements like getElementById() and getElementByName(). They have served very well in the old days of JavaScript coding,  but once you start using jQuery selector, which is quite similar to CSS selector, I am sure you will forget them. Searching and finding HTML elements using jQuery selectors are natural, intuitive, and super easy and that's why I love them.

5 Examples of Text Block and Multiline String in Java - Tutorial

While some programmers are troubled with frequent Java releases (it's actually hard to keep up), many are excited to see new features coming in Java every six months. I haven't been sharing a lot of new features lately, last I wrote about var from Java 10 and static factory from Java 9. Well, to be honest, I don't get much time to try out these new features and to publish articles on those, but a couple of new features from Java 12 and Java 13 caught my attention and I decided to give it a try and write something about them. So, the first feature in this series is the "Text block" of Java 13.

How to use Records in Java? Example Tutorial

Hello! Welcome, all again in the journey of Java. We are here today to learn a very interesting topic in Java: Records!  If you are wondering what is Record and how to use Record in Java then you have come to the right place. In this article, I am going to cover everything about the Record I know and will try to explain in simple words so that you know what is Records, what benefits it offers, and how you can use them. But before we dive in and understand what it is, let’s first understand what would happen without them. So, we would get an idea of the need and significance of Records. By the way, this is another article covering new Java features, earlier, I have covered Sealed Classes, CompletableFuture, Phaser, and how to use var in Java. If you haven't read them already, you can check them to learn these useful Java features 

How to use Sealed classes and Interface in Java? Example Tutorial

Hello friends! If you are wondering what is Sealed class in Java and whether you should use it or not and looking for a Sealed class tutorial then you have come to the right place. Earlier, I have shared Java Record Tutorial and Java CompletableFuture tutorial and today, I will explain you about another interesting Java feature. Yes, I am talking about Sealed classes in Java. This is a relatively new feature that was added in Java 15 as a preview feature. This was added as part of JEP 360 to provide more fined-grained inheritance control in Java. This can be better understood by an example. So, I am going to give you a situation and we will analyze this situation together. 

6 Subtle Date and Calendar Details to Learn before using Date in Java - Example Tutorial

Hello guys, to appreciate the brilliance of the new Date and Time API introduced in Java 8, you must remember the nasty problems you have earlier faced with Java's old Date and Calendar API Well, I have been using Java for the last 20 years and I have to face them so I thought to write this article to educate Java programmers about the shortcomings of old Java Date and Calendar API. Another reason for this article is that even though Java is ready with the new, shiny, and carefully designed Date and time API, your project is probably not. Most of the prominent organizations that use Java at large scales, like Investment banks, Insurance companies, major E-commerce giants, are quite reluctant to upgrade. There are many firms, both big and small that are still running on Java 5 and expect to migrate to Java 6 in a couple of years.

How to find number of days between two dates in Java 8 [LocalDate until() & between() Example ]

You can use the LocalDate.between() method to find the number of days between two dates in Java. This method is full proof and takes care of date-time nuisances like leap year and daylight saving time. Before Java 8, it was really difficult to calculate the number of days between two dates in Java. Though old Date and Calendar API provides methods to compare two dates like equals(), before(), and after(), no method can tell the exact difference in days or months between two dates unless you are using the joda-time library. All that is over now. You can now do better date-time arithmetic using Java 8 Date and Time API.

How to use TreeSet in Java? SortedSet Example Tutorial

Hello friends, we meet again for our journey of learning Java. Today, we are gonna learn something very fruitful and easy. Hope you all are excited and ready. I would recommend you guys to go through the HashSet article which goes over hashing and what sets are actually as this topic has some of its features. So, What's the wait? Let's start! Continuing our example used in HashSet and reusing it here. Suppose you guys are given the task of storing car names (yes, I love cars :p). Now, how would you store it? This question has already been answered by our HashSet article. The new problem here is, we need to store the names in a naturally sorted manner. As we have a set of String, we need to sort them alphabetically. How to do that?

How to Remove a Key, Value, or Entry from HashMap in Java 8 - Example Tutorial

In the last article, I have shown how to remove key/value pairs from a map in Java-based upon some conditions like removing all entries where values are greater than some values. I have told you that you must use the Iterator's remove() method for removing mapping while iteration to avoid ConcurrentModificationException, but that's not required anymore in Java 8. From JDK 8 onwards, you can selectively remove mapping without iterating over Map. The JDK 8 API has added several new methods to existing interfaces e.g. java.util.Collection, java.util.Map, Comparator, etc because the interface can now contain concrete methods in the form of static and default methods.

[Solved] How to Reverse an ArrayList in Java using Recursion? Example Tutorial

If you ever need to reverse a List in Java e.g. ArrayList or LinkedList, you should always use the Collections.reverse() method. It's safe and tested and probably performs better than the first version of the method you write to reverse an ArrayList in Java. It's also one of the recommended best practices to prefer the library method instead of writing your own, as advised by great Joshua Bloch in Effective Java. There are so many benefits of using library methods like it was written by experts, thoroughly and open-source tested, and more actively maintained. Anyway, if you have been asked to write a function to reverse a List using recursion in Java, maybe as part of your homework, assignment, or during an interview, then you are in the right place.

How to use ConcurrentLinkedDeque in Java? Example Tutorial

Hello guys, ConcurrentLinkedDeque is another amazing class from Java's concurrent collection package which can be used as high-performance, thread-safe and non-blocking data structure. As the name suggest, its a Deque which means its allows you to operate at both ends of queue. You can insert at one end and consume from other end. It's also concurrent and thread-safe which means multiple threads can operate on same queue at the same time. You can have multiple producer threads which are inserting data into the queue and multiple consumer threads which are consuming data from this data structure. Before going to discuss this topic, let me inform you that this article is in continuation of our deque article series. It's totally not mandatory to go through those articles, but it is highly recommended as they all play a part in the understanding of today's topic.

How to find the First Key or Value from a Map in Java? HashMap Example Tutorial

Hello guys, if you are working with Java HashMap or any other Map implementation like TreeMap or LinkedHashMap and wondering how to get the first enty, first key or first value then you have come to the right place. In my past articles, I have talked about how HashMap works internally as well as we have seen several HashMap examples and in this article, I will show you how to get the first key or value from HashMap in Java. I actually needed this when I was doing a coding exercise online and I was using TreeMap to store objects. Since TreeMap store objects or mapping like key and value in sorted order the first element can be either maximum or minimum depending upon whether you sorted the TreeMap on increasing or decreasing order. 

How to convert Milliseconds to Minutes and Seconds in Java? TimeUnit Example Tutorial

I used to convert milliseconds to seconds in Java by simply dividing it by 1000, and then into minutes by further dividing it by 60, and then hours by even further dividing by 60 and so on. This works but its not the most elegant way to convert millisecond into hours, minutes, seconds or other time unit. JDK comes with a nice utility class called TimeUnit, which as its name suggest, allow you to convert one time unit into other. So if you have milliseconds e.g. execution time of a method and you want to convert into minutes and seconds to improve readability, you can use TimeUnit.toSeconds() and TimeUnit.toMinutes() methods. 

Difference between final and effectively final of Java 8? Example Tutorial

If you remember, You can only access a local final variable inside an anonymous class, if you try to access a non-final local variable then compiler will complain, but things has changed a little bit in Java 8 with introduction of lambda expression. Since Java designer are expecting more and more usage of lambda expression they have relaxed that restriction a little bit by introducing a new concept called effectively final, which means now you can access a non-final variable inside anonymous class or lambda expression, provided its not changed after creation i.e. even if its not declared with final modifier but it still like a final variable.  So, concept wise, the variable must still be treated as final variable but the final keyword is not mandatory anymore. This difference between final and effectively final will be more clear with an example of both anonymous class and lambda expression. Let's see that.

How to create Soft and Hard Links in Java? Files + Path + Java NIO Example

Hello guys, not many people know that Java NIO File API also allows you to create links in Java. Many of Java programmer are familiar with ln command in Linux which is used to create soft and hard link but you can also do that using Java File API. Path represents not only files and directories, but links to files and directories, symbolic or otherwise. In fact, the Path class detects and handles links automatically, without requiring you to do anything specific when one is encountered in your application. However, you do have options available on how to handle symbolic links when they occur, and you can also create new links in Java for file systems that support them.

Difference between Filter and Listener in Servlet - Java JEE

One of the frequently asked Servlet Interview question is what is the real difference between a Filter and a Listener? What is the role they play in a Java web application? In this article, I'll try to answer these question by explain what is Servlet Filter and Servlet Listener and what are their use in Java web application. A filter is used for pre-processing and post-processing. It can intercept the request before it hits to the servlet and can modify both header and body of Servlet, hence it is used to perform login, authentication, authorization and other security aspect which is require before client can access the resource e.g. a Servlet or JSP. Similarly, filters can also intercept the response and modify both header and body of response, hence you can use it both compress and encrypt the response before sending it to the client. 

Top 15 SQL Server Management Studio (SSMS) Keyboard Shortcuts and Tips

SQL Server Management Studio, also known as SSMS is an essential tool for Microsoft SQL Server developers as well as any full-stack Java developer whose application is using SQL Server database in the backend. It allows you to connect to the MSSQL database, execute SQL queries, check execution plan, see table and schema detail, writing and debugging stored procedures, and many more features. Imagining life without SSMS for SQL Server DBA and developer is impossible. 

ByteBuffer Read Write Example in Java

Hello guys, if you have worked with Java NIO API then there is a good chance that you may be familiar with ByteBuffer, one of the important class which is used to read and write data from channels. Java NIO Buffers are used when interacting with NIO Channels like FileChannel. As you know, data is read from channels into buffers, and written from buffers into channels. A buffer is essentially a block of memory into which you can write data, which you can then later read again. This memory block is wrapped in an NIO Buffer object, which provides a set of methods that makes it easier to work with the memory block. If you compare this with traditional java.io package then you will remember that we read and write data from stream into array but in case of NIO, we read and write data from channels into ByteBuffer. 

3 ways to parse JSON String to Object in Java [Jackson, Gson, and json-simple Example]

One of the common task in Java web application, particularly the ones which deals with RESTful web services are parsing JSON messages. Many times you need to parse JSON to create a Java object like parsing a JSON message to create a POJO,  for example, an Order or a Book. Representing JSON in Java is easy, it's like a String value but unfortunately, JDK doesn't provide any standard API to parse JSON in Java. There were talks to add JSON parsing API in JDK 9 but that didn't materialize, but you don't need to worry. There are many good open-source JSON parsing libraries you can use to parse any kind of JSON in your Java program. 

101 Blockchains vs Blockchain Council Review? Which is better place to learn Blockchain Technology in 2024?

Blockchain is an interesting phenomenon that has been garnering the attention of millions of tech enthusiasts worldwide. It started off as the technology behind cryptocurrencies and has evolved as the top choice for transformation of many industries. The radical growth in popularity of blockchain supported the rise of attention towards blockchain training and certification. Since blockchain is a new technology, many beginners worry about one particular question. Where is the best place to learn blockchain? Interestingly, the variety of blockchain training and certification course providers can serve interesting options for every aspiring blockchain professional. The question regarding the best blockchain training and certification provider ultimately rounds up on a comparison between the top players in the market. Let us find out which platform can help you achieve your blockchain career objectives.

3 ways to Learn Web development in Depth in 2024

Web development has changed a lot in the recent decade. More and more frameworks and libraries have come out while the older ones are either updated or left out. For example, React and Vue has debuted in the mid-2010s and quickly became popular while AngularJS was completely re-written to survive modern web development. Today, Web development is one of the most popular domains in the IT community. Every company or product wants a website because the web is easily accessible today. Even when mobile applications are gaining popularity, the web remains at the top.

Top 20 Bootstrap Interview Questions and Answers for Web Developers

Hello guys, if you are preparing for web designer or web developer interview and looking for bootstrap interview questions, one of the popular CSS framework then you have come to the right place. Earlier,  I have shared HTML 5 Interview Questions and JavaScript Interview Questions and today, I will share 20 common Bootstrap Interview questions for 1 to 3 years experienced web designers and developers. These courses are suitable for both beginners and intermediate developers. If you have used bootstrap and CSS then you can easily answer all of these questions but if you struggle to answer any of these questions then you can always go back and checkout these best Bootstrap courses to learn and revise essential Bootstrap and CSS concepts in quick time. 

Top 20 Flutter Interview Questions and Answers for 1 to 2 Years Experienced

Hello guys, if you are preparing for Flutter and Dart Interview to become a Flutter app developer or land a job as Flutter Application developer and looking for frequently asked Flutter Interview questions with answers then you have come to the right place. Earlier, I have shared React Native Interview Questions and Android Interview Questions and in this article, I am going to share 20 common Flutter Interview Questions with Answers for you to prepare well. These Flutter Interview Questions covers essential Flutter concepts and you can use this list to quickly revise them. If you have used Flutter or worked as Flutter developer then you can easily answer these Flutter Interview Questions but if struggle to answer them then you can always go back and check these best Flutter online courses to revise essential Flutter concepts.

Top 20 Rust Interview Questions and Answers for Developers

Hello guys, if you are preparing for Rust Developer job interview and looking for Rust Programming interview questions then you have come to the right place. Earlier, I have shared best books and courses to learn Rust programming and in this article, I am going to share frequently asked Rust Interview Question. These questions covers essential Rust features and concepts and you can use this list to quickly prepare for Rust developer interviews. If you have used Rust in past or worked as Rust developer then you can easily answer these questions but if you cannot, you can always go back and join one of these best Rust online courses to learn and revise essential Rust concepts.

Spring Boot + Angular + Java Project Example and Tutorial

Hello Java programmers, if you are looking for a full-stack Java project with Spring Boot and Angular then you have come to the right place. Earlier, I have shared best Spring Boot courses, books as well as Spring boot + Reactjs project and In this tutorial, we are going to discuss how to create your first application using spring boot and angular. So we are using a simple crud application to build the application here. Here we create a School Classroom Dashboard application that can insert, update, delete and search students. The frontend of the application will be handled by angular and the backend of the system is using the spring boot. This is also a great Spring boot project beginners to do learn Spring boot better. So let's have a look into this.

Difference between Proxy and State design Pattern in Java

Hello guys, if you are preparing for Java interviews and looking for difference between Proxy and State design pattern then you have come at the right place. In the past, I have explained several important object oriented design patterns like State patttern, Strategy, Adapter, Facade, Factory, Observer, Decorator, Command, and Composite Pattern and also shared frequently asked questions on design patterns (See here) and in this article, I am going to share the key difference between Proxy and State Design Pattern in Java and OOP. The difference between Proxy and State pattern comes in both intent and structure, here are the key difference between both Proxy and State Design Pattern in Object oriented programming.

AES Encryption and Decryption in Java - AES Encoding Decoding Example Tutorial

Hello Java programmers, if you are looking for an example to encrypt and decrypt a test using the AES algorithm in Java then you have come to the right place. Earlier, I have shown you how to Base 64 encode and decode a String in Java, and in this article, I will teach you how to encode and decode a string using AES Algorithm.  If you don't know, AES stands for Advanced Encryption Standard algorithm and it is a symmetric block cipher that is used to protect classified information by many Government and Security organizations. You can use AES to encrypt sensitive data in your application config file like database password, user login details and keys etc. In our example we will be using an AES Algorithm with AES - 128, AES has a fixed block size of 128 bits. We will be using a password based secret key.

Top 10 No Code Development Tools To Learn In 2024

As you must have guessed from the title, in this article, we will be looking at some of the best no-code development tools you can use to better understand programming. But before we get to the 10 best no-code development tools of 2024, let me tell you a bit about what no-code development really means.
No Code Development is actually a platform that can be used for building applications without any coding. Sounds pretty simple, right? You do not need to have any coding experience or knowledge to build the applications. It is helpful for programmers as well as non-programmers in creating applications. It is also closely connected to visual programming languages.

Top 5 Websites to learn Flutter for FREE in 2024 - Best of Lot

Hello guys, if you want to learn Flutter and looking for resources then you have come to the right place. Earlier, I have shared best Flutter courses and in this article, I will share best websites to learn Flutter in 2024. Flutter is an open-source framework built-in top of a programming language called Dart and developed by the google company to create a native android and iOS mobile apps as well as web applications using one base code instead of learning a bunch of languages to deliver that work. This framework has many benefits for companies and businesses since it reduces the costs and great language to build really beautiful UI design that makes people convert and use your mobile application as well it fits the screen size of every device so you don’t have to create a custom screen size for multiple mobile phones and much more just to name a few.

How to use Session attributes in Spring MVC? @SessionAttribute and @ModelAttribute Annotation Example Tutorial

Hello Java and Spring developer, if you are wondering how to use the session attribute in Spring MVC application, then you have come to the right place. In the past, I have shared how to build REST API using Spring and several other Spring tutorials like Spring Boot + React fullstack application, and in this article, I will share a couple of strategies to use session attributes in Spring MVC application. Using session attributes in Spring-MVC is a major concern in each web application as there is session management in most of the web applications right now. Because Spring MVC is such a sophisticated framework for web development, it comes with its own tools and API for working with sessions. 

How to Fix org.springframework.jdbc.BadSqlGrammarException: Implicit conversion from data type varbinary to date is not allowed

Hello Java programmers, if you are using JdbcTemplate of Spring Framework to interact with the database from Java program and getting "org.springframework.jdbc.BadSqlGrammarException: Implicit conversion from data type varbinary to date is not allowed" error then you have come to the right place. Earlier, I have taught you how to use JdbcTemplate in Java and Spring, and in this article, I will teach you how to fix "org.springframework.jdbc.BadSqlGrammarException: Implicit conversion from data type varbinary to date is not allowed" error in Spring-based Java application. 

How to use @RequestBody and @ResponseBody Annotations in Spring? Example Tutorial

Hello Java programmers, if you are wondering how and when to use use the @RequestBody and @ResponseBody annotation in Java then you are at the right place. Earlier, I have shared how to create RESTful Web Service using Spring Boot and today I will teach you how and when to use these two crucial annotations @RequestBody and @ResponseBody. While developing client server Java application using Spring Framework you may need to connect the HTTP request and response body with the domain object while working on the REST API. The annotations @RequestBody and @ResponseBody in Spring were used to bind these HTTP requests and responses. In simple words, these are the annotations which converts JSON to your Java object and your data to JSON while sending to client. Let's look at these two Spring annotations in more detail.

Top 5 Common Spring Bean Exception, Error and Solution [BeanDefinitionStoreException, NoSuchBeanDefinitionException, BeanCreationException]

Hello guys, error handling and troubleshooting is an important skill for Java developers. During development you can get variety of exception and sometime they are quite difficult to solve especially if you have no clue what they are and what causing them. Things can be even more difficult if exception is coming from the framework you are using like Spring Framework or Hibernate, that's why its important to know common error and exception for standard framework like Spring. In this article I will explain what BeanDefinitionStoreException, BeanCreationException, NoSuchBeanDefinitionException and BeanDefinitionOverrideException are, what can cause them and how to fix those problems.

Spring Boot @Autowired Example - How Autowiring of Beans works in Spring?

Hello guys, if you are wondering how to use @Autowired annotation in Spring Boot and how auto-wiring works in the Spring framework and how the Spring framework magically finds dependency and relevant beans to inject into your program then you have come to the right place. In the past, I have shared how Spring MVC works and in this article, I am going to explain how auto-wiring works in spring and how you can use @Autowired annotation for auto-wiring dependencies in your code. In Spring, you need to know the most important things before starting your coding. From spring 2.5 onwards, the annotations-driven dependency injection was introduced and it is used to inject collaborating beans into the beans. So in this tutorial, we are going to explain how does auto wiring work in spring.

How to use @ModelAttribute in Spring MVC? Example Tutorial

Hello guys, there are many annotations in Spring boot which  I have shared 5 essential Spring Boot annotations earlier and from those, the @ModelAttribute takes a special place as this helps to bind a method parameter or method return value to a named model attribute then exposes it to a web view. So we are going to discuss what is @ModelAttribute in Spring MVC with an example given below.  The @ModelAttribute annotation refers to a Model object attribute (the M in MVC ;). The @ModelAttribute annotation is special to Spring-MVC and is used to prepare model data. It's also used to specify the command object that'll be tied to the data from the HTTP request.

How to calculate GCF and LCM of two numbers in Java? Example

This week's programming exercise is to write a Java program to calculate GCF and LCM of two numbers. The GCF stands for a Greatest common factor and LCM stands for Lowest common multiplier, both are popular mathematical operations and related to each other. The GCF is the largest number which divides both the number without leaving any remainder e.g. if two numbers are 24 and 40 then their GCF is 8 because 8 is the largest number which divides both 24 and 40 perfectly, without leaving any remainder. 

10 Reasons to Learn Rust Programming Language in 2024

Hi there! If you're reading this, you're probably considering learning a new programming language, and you're wondering if Rust is the one for you. Well, buckle up, because I've got ten reasons why Rust is worth your time and effort. Rust is a modern systems programming language that offers a unique combination of speed, safety, and fun. It was created to solve the problem of low-level programming languages like C and C++, which are prone to security vulnerabilities and can be difficult to use effectively. With its focus on performance and safety, Rust is quickly becoming one of the most popular programming languages in the world, and for good reason.

Template Method Design Pattern in Java? Example Tutorial

Template Method Pattern defines a sequence of steps of an algorithm but let you free to implement those steps on your way. You cannot change the algorithm but you can define how those steps should behave. To make sure that you cannot change the algorithm, template methods are usually made final in Java, which is also a good use case of when to make a method final in Java. The subclasses are still  allowed to override the steps but as I said, they are not allowed to change the sequence. It can also be provided a default implementation for one or more steps. Let us look at the following example to understand Template Method Pattern.  A Template method pattern provides a skeleton for performing any sort of algorithm or an operation, and it allows the sub-classes to re-define part of the logic. 

How to create Immutable List, Set, and Map in Java? List.of(), Set.of() and Map.of() Examples

Hello guys, this is my first article in Java 9 features on this blog, and today you'll learn about my favorite feature "factory methods for collection", which is introduced as part of JEP 269. The JEP stands for the JDK enhancement proposal. If you have worked in Groovy or Kotlin then you know that how easy is to create the list with elements using collection literals e.g. to create a list of 1, 2, 3 you can simply write val items = listOf(1, 2, 3). Unfortunately, Java doesn't support that yet but things have been improved with the factory methods for collection in JDK 9 and it's almost like that. JDK has added static factory methods like of() on to basic Collection interfaces which you can use to create a list of items.

Why Singleton is Anti Pattern in Java Now and Why you should avoid it? Example

There was a time when the Singleton pattern was the darling pattern of many developers. It's a unique feature to keep certain services available globally, makes it very useful in all kinds of applications. It was also one of the most used design patterns among Java developers. I think the main reason for the Singleton pattern's popularity of designing the application is that there is always one instance of the most important service like Manager and Data Access classes. Still, with the adoption of Dependency injection, Singleton slowly faded away, and now it's considered an anti-pattern in Java applications. 

Difference between 32-bit and 64-bit JVM in Java?

One of the rather new or latest Java interview question is, "What is the difference between 32-bit and 64-bit JVM? or, How do you choose between 32-bit vs 64-bit JVM? or When to use 32-bit or 64-bit JVM? Some interviewer also use this concept to trick candidates by asking what would be the size of int variable in 32-bit and 64-bit Java? As mentioned in 130+ Java questions from last 5 years. Another tricky questions is, does same Java program can run on both 32-bit and 64-bit JVM? Short answer of this question is that Java is platform independent and same Java program will run absolutely fine in both 32-bit and 64-bit JVM. The real difference comes in addressable memory or heap memory. 

10 Reasons To Learn HTML and CSS in 2024

Hello guys, if you want to become a web designer, a web developer or a just a fullstack developer but not sure if you have to learn HTML and CSS then you are not alone, many people have similar doubt especially those who want to become a frontend or backend developer . If you're looking to build websites or become a web developer, you'll definitely want to learn HTML and CSS. HTML (Hypertext Markup Language) and CSS (Cascading Style Sheets) are the foundation of all websites, and without them, the web as we know it would not exist. But why should you learn HTML and CSS? Let's take a look at 10 reasons why HTML and CSS are worth your time and attention.

How long it take to learn Blockchain?

Blockchains are obviously one of the unique technologies in the industry right now. Experts have pointed out that Blockchain could generate revenue of around $39 billion by 2025. In addition, Blockchain also offers significant opportunities for development. You can learn Blockchain and become a certified blockchain developer, smart contract developer or blockchain engineer. Unique features of Blockchain, such as decentralization and immutability, could help in developing unique tamper-proof records of transactions on a decentralized network of computers.

How to use Lombok in Java? Lombok @Data and @NonNull Annotations Examples

Hello Java programmers, if you have been doing professional Java development, you may have heard about Lombok library, one of the most popular Java libraries among professional Java developers, making coding in Java much more fun and rewarding. Java has always been criticized for its verbosity, and many programming languages like Scala and Groovy are invented to solve that problem, but Lombok solves that problem in Java itself. This means you don't need to learn a new programming language, but you can use the Lombok library and its annotations to write clear and concise code in Java. 

Switch case vs if-else-if vs Polymorphism in Java - Example Tutorial

Hello guys, conditionals like if-else and switch are very important for programming. After all, programming is for decision making and that's where these conditional programming elements help, but you may have heard that excessive use of if-else and switch is bad and is often taught as code smell. So does that mean, should you never use a switch case in Java? In this article, I will share my thoughts about using switch case vs if-else and then whether we can use Polymorphism to replace if-else in Java and Programming, but before that let's see what is a switch constructor in  Java. A switch construct allows you to choose between multiple options depending upon input,