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ConcurrentLinkedDeque Example in Java - A High Performance, Thread-Safe, Non-blocking Data Structure

Hello friends, we are here again today on the journey of Java, well boarded, well excited! Hope you guys are ready for being startled as today's topic is definitely going to startle you guys. 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. So please go ahead and brush up on those articles. Now, hope you guys now have a basic understanding of what a deque is, its limitations in a multi-threaded environment, what a blocking deque is, and its limitation too. 

Top 5 Python Certifications to Aim in 2022 - Best of Lot

Python is a versatile programming language that may be used in a variety of fields, including computer science, data science and machine learning, web scraping and automation, web building, and more. It comes with a large number of frameworks and tools, as well as a large community of developers that are working to improve the language. Due to its wide range of applications, it has become the most popular language today, behind only JavaScript in popularity, according to the findings of the annual JetBrains survey. And if you're a Python developer or want to expand your skillset in this language in order to secure a high-paying job, the next step is to obtain certifications from reputable organizations.

Top 5 C++ Certification for Programmers to Aim in 2022

Hello guys, if you are looking for the best C++ certification to enhance your profile in 2022 then you have come to the right place. In the past, I have shared the best IT certifications for Java developers and in this article, I am going to share the best certification for C++ Developers. The digital world has been growing up. It is like every digital device we hold has the application of coding in it. Hence, it has made coding an inevitable skill. Coding can be learned from anywhere. Every day there are so many sites evolving to learn what you want. But to prove that you have enough experience, you just need a competent certificate to stand out of crowd. Here, we will introduce you to the top 5 certifications that you can get if you're a C++ based work person and also if you want to start your career in C++. 

Review - Is Coursera's Cybersecurity Specialization by Maryland University worth It in 2022?

Cyber security is the science behind protecting the company's infrastructure, including employees' computers, their network, the servers where they host the web application, and the database of users' information or any sensitive information. They use some tools to assess the security of their infrastructure and to discover new vulnerabilities.

How to Prepare for Google Cloud Network Engineer Exam in 2022

Hello guys, if you are preparing for the Google Cloud Network Engineer exam or want to become a Google Certified Engineer in 2022 then you have come to the right place.  In the past, I have shared the best Google Cloud Platform courses as well many more resources to prepare for Google cloud Digital Leader, Google Cloud Developer, Google Cloud Data Engineer, and other exams and in this article, we are going to discuss a step by step guide to prepare for Google Cloud Network Engineer certification. This guide not only gives you information about the actual exam but also shares useful resources like books, online courses, and mock tests, both free and paid which you can take to prepare well for this exam. 

Top 5 Udemy + AcadMind Courses for Web Developers by Maximillian SchwarzMuller

If you guys are in dire need of a few web development and app development online courses but couldn't select? Want to learn from one of the best in the industry and in a fun, easy way? You have come to the right spot. What's the wait then? Let's start. In this article, I am going to share the best courses from one of my favorite Udemy instructors Maximilian Schwarzmüller, whose Angular, Reactjs, and web development courses have helped me a lot. While I have mentioned him courses multiple times in my favors list, I thought to create this dedicated list for his courses to help people like me who want to learn from Maximillian Schwarzmuller and AcadMind courses.

What are generators in JavaScript? Example Tutorial

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.

Top 5 Jose Portilla Courses from Udemy to Learn Python, SQL, and Data Science in 2022 - Best of Lot

Hello guys, If you have joined any course on Udemy then I am sure you will have your favorite instructor, I have many and in the past I have shared best Udemy course by Maximillian Schwarzmuller and today, I am going to share best Udemy courses by Jose Portilla, anothe of my favorite instructor when it comes to learn Pytho and related technologies. Jose Portilla is unquestionably one of Udemy's most popular Data Science and Machine Learning professors. His courses are a treasure for data junkies, with over 2,500,000 total students and an average rating of 4.5+/5 stars from 800,000+ evaluations. His lectures have covered topics ranging from Python to Machine Learning to Quantitative Analysis over the course of several years, and his students have overwhelmingly praised them. Jose Portilla is best recognized as one of the most popular Udemy teachers. 

React Tutorial - How to Create a react app using redux and react-redux hooks? Example

Redux is the most popular state management library. It is often used with React apps that are huge in size and state are shared among multiple components. Redux is a complex library to understand and even more complex to implement. It was even more complex and complicated before the introduction of react-redux hooks. Earlier, the connect method provided by Redux was used to connect React with the Redux store. Using connect method with other methods such as mapstatetoprops was complicated. But with the introduction of react-redux hooks, it is easy to use redux with redux. In this article, we will discuss what are react-redux hooks and how to use them with React.

Top 5 Courses to Crack Frontend Web Developer Interviews [HTML, CSS, and JavaScript] in 2022 - Best of Lot

Hello guys, if you are preparing for a frontend developer interview and looking for the best interview preparation resources like online courses, books, and tutorials then you have come to the right place. Earlier, I have shared the best coding interview preparation courses and books, and in this article, I am going to share the best  Frontend developer interview courses. These courses will prepare you for essential frontend topics like HTML, CSS, JavaScript, as well frontend development frameworks like React.js and Angular. Web development is generally divided into two parts - frontend (client-side) development and backend (server-side) development. A web developer can either be a master in front-end development or backend development. 

How long does It take to Learn Python Programming Language?

Hello guys, if you want to learn Python but are not sure how long it will take, you have come to the right place. Depending on your goal and experience level, it can take a week to a few months to learn and master the Python programming language. For example, if you come from a Java background and want to learn Python as your second programming langauge, it can take a day or two to set up Python in your development environment and write hello world. You can even start writing simple Python programs in minutes if you use interactive coding platforms like Educative, Codecademy, and FreeCodecamp. 

How to fix @Autowired - No qualifying bean of type found for dependency in Spring Boot? [Solved]

Hello guys, if you are working in a Java and Spring Boot project and you are getting errors like "@Autowired - No qualifying bean of the type found for dependency " then you have come to the right place. Earlier, I have shared how to solve error creating bean with name in Spring framework and In this tutorial, we are going to discuss how to fix @Autowired - No qualifying bean of the type found for dependency. When we come across the org.springframework.beans.factory, we need to be careful. Whether there isn't a qualifying bean of type XXXX accessible, we should see if there is a spring bean called XXXX in the runtime. In most cases, we simply try to inject a bean that isn't defined.

Top 5 Python Certification Books, Courses and Practice Tests for 98–381exam in 2022 - Best of Lot

Hello guys, if you are preparing for Microsoft's Python certification 98-381 and looking for the best resources like online courses and tutorials, then you have come to the right place. Earlier, I have shared the best Python books, and the best online courses to learn Python. In his article, I will share the best online courses to prepare for this Python certification. Let’s say that you want to get a professional career in the IT field and you are wondering what you should do in this situation. I would highly recommend that you need recognizable certifications in your belt whether you want to be a web developer or a programmer in any language and python is absolutely one of them.

Top 5 Courses + Practice Tests for AWS Certified Data Analytics Specialty Certification Exam (DAS-C01) in 2022 - Best of Lot

Hello guys, if you are preparing for AWS  Data Analytics Specialty Certification Exam (DAS-C01) in 2022 or want to become an AWS Certified Data Analytics Specialist and looking for the best resources to prepare for this exam and crack in the first attempt then you have come to the right place. In the past, I have shared the best resources and guides to prepare for various AWS exams like AWS Cloud Practitioner,  AWS solution architect,  AWS developer associateand AWS SysOps Admin exam in this article, I am going to share the best online courses and practice test to prepare for AWS Data Analytics Specialty Exam DAS -C01. These are the most comprehensive and up-to-date resources to prepare for this certification from sites like Udemy, Pluralsight, and Coursera, and they are also tightly aligned with the syllabus and cover all exam topics. 

Top 5 Courses to Crack Cisco CCNA 200-301 Certification Exam in 2022 - Best of Lot

Hello guys, if you are preparing for Cisco CCNA certification, particularly CCNA 200-301, and looking for the best resources like online courses, tutorials, practice tests, books, etc then you have come to the right place. Earlier, I have shared the best CompTIA certification courses and in this article, I am going to share the best online courses to prepare for Cisco CCNA 200-301 certification exam. These courses are created by experts and trusted by thousands of developers and you can join them to know and learn more about Cisco CCNA certification as well as pass their Cisco CCNA official exam to get your Certification.

Top 5 Courses to Crack Confluent Apache Kafka Developer Certification (CCDAK) in 2022 - Best of Lot

Hello guys, if you want to become a certified Kafka Developer in 2022 then you have come to the right place. You will be glad to know that Confluent offers Apache Kafka Certifications and one of them is the popular Apache Kafka Developer Certification also known as the Confluent Certified Developer for Apache Kafka, or Confluent Certified Developer for Apache Kafka (CCDAK) exam. If you already know about this exam and preparing for it but need the best resources like online courses, books, and practice tests then stay tuned. Earlier, I have shared the best Apache Kafka courses for beginners and In this article, I am also going to share the best online courses and practice tests to prepare for Apache Kafka Developer certification in 2022 and become a certified Kafka developer.

3 ways to learn Python Programming in 2022 - Best of All

Hello guys, if you want to learn Python, one of the most popular programming langauge of this time but are not sure where to start then you have come to the right place. In this article, I am going to share with you the 3 best ways to learn Python programming from scratch. Along the way, I will also share the best resources to learn Python in 2022. Python is a high-level, interpreted, dynamically-typed, object-oriented scripting language. Today, Python is one of the most widely used programming languages. One of the major reasons for Python’s popularity is that it is easy to learn and code. Python is used in several domains such as web development, machine learning, artificial intelligence, data analytics, data visualization, and more.

Top 5 Course to learn Splunk for Beginners in 2022 - Best of Lot

Hello guys, if you want to learn Splunk, one of the most popular tools for aggregating, monitoring, and visualizing data, particularly logs files then you have come to the right place. In the past, I have shared the best courses to learn DevOps, Selenium, and Machine Learning and in this article, I am going to share the best online courses to learn Splunk for Beginners and Experienced programmers. I first come to know about Splunk in one of the company workshops where they are switching to Splunk for better monitoring of log files. I really like the concept of installing Splunk agent on boxes and then seeing logs from all production machines in one place in a web-based interface. 

Top 5 Courses to Crack Google Cloud Digital Leader Certification Exam in 2022 - Best of Lot

Hello friends, we are here again today for another exciting topic to discuss. But, today we are not gonna discuss something which is related to Java or any other language or spring boot. Today we are gonna discuss Google Cloud Platform Digital Leader Certification which is immensely practical and has the potential to land you very high-paying jobs. If you are preparing for Google Cloud Professional Digital Leader certification and looking for the best prep material and resources then you have come to the right place. Earlier, I have shared the best Google Cloud courses for beginners and today we are gonna take a look at the best available Google cloud courses online. 

What is variable scope and closure in JavaScript? Example Tutorial

Hello guys, if you want to learn about variable scope in JavaScript then you have come to the right place. Earlier, I have shared the best online courses and books to learn JavaScript and in this article, I will explain to you how to declare variables in Javascript and different variable scopes. In JavaScript, variables can be declared using the var, let, or const keywords. It is also possible to declare variables without using any of these keywords. The major difference with different keywords is in the scope of the variables.  Every variable declared in JavaScript has a scope. Understanding variable scope in JavaScript is very important. In this article, we will discuss what is the variable scope and other terms related to it such as closures.

Top 5 Online Courses to Learn Chef and Salt in 2022 - Best of Lot

Hello friends, we are here again today for another exciting topic to discuss. But, today we are not gonna discuss something which is related to Java or any other language or Spring boot. Today we are gonna discuss Chef and Salt, two of the most popular DevOps and Infrastructure automation tools. They are immensely practical and have the potential to land you very high-paying jobs. If you are a DevOps Engineer or aspire to become a DevOps Engineer then you may have heard about Chef, Puppet, Ansible, and Salt. Earlier, we have seen best courses to learn DevOps, and today we are gonna take a look at the best available Chef and Salt courses online.

Top 5 Practice Tests & Courses to Crack Azure IoT Certification AZ-220 Exam in 2022 - Best of Lot

Hello guys, if you are preparing for the AZ-220 exam or Azure IoT certification in 2022 and looking for the best AZ-220 certification courses then you have come to the right place. In the past, I have shared the best AZ-900 courses, best AZ-104 courses, and best AZ-204 courses and in this article, I am going to share the best online courses to crack Azure IoT certification or AZ-220 exam. These are the best resources to prepare for this exam and curated from popular sites like Udemy, Coursera, and Pluralsight.  Before we get to the best certification courses that you can use to clear the IoT AZ-220 certification exam, let me tell you what exactly is this AZ-220 Certification. 

Top 5 Online Courses to Learn Management Skills in 2022 - Best of Lot

Are you a new manager? Are you uncertain of your skills and expertise? Do you want to bring the best possible results to the company you work for?  Good… you’re in the right place. Management is not an easy task. You have to overcome people’s problems, help them and be like their elementary school teacher. The only difference is that these adults don’t fight over a pencil or a seat. Whatever it is that you’re striving for in your management career, a management course will help you get there. It’s always nice getting educated by someone experienced that has already gone through what you’re going through.

Top 5 Online Courses to Learn Facebook Marketing in 2022 - Best of Lot

Hello guys, if you want to learn Facebook Marketing and looking for the best online courses other resources then you have come to the right place. I have been sharing resources on digital marketing for quite some time and earlier I have shared 5 actionable Twitter courses as well as the best Instagram Marketing course, and today, I am going to share the best Facebook Marketing courses to join in 2022. These are truly the best courses to learn essential skills like Facebook ads and in general how to take advantage of Facebook's expansive reach to promote your product.  I have used Facebook and Twitter to promote my books and online courses but I am still learning with these courses to generate consistent sales and thought to share with you. 

Top 5 Websites to Learn Data Science Online in 2022 - Best of Lot

Hello guys, if you want to learn Data Science in 2022 and looking for the best resources like books, tutorials, online courses, and websites then you have come to the right place. Earlier, I have shared the best Data Science courses and books and in this article, I Am going to share the best websites to learn Data Science online in 2022. Data science is the method of gathering data from many sources and channels such as databases analyzing and transforming them into visualization and graphs that facilitate the readability and understanding of your data to ensure better decision-making inside an organization and add value to their business.

Top 5 Online Courses to Learn Perl in 2022 - Best of Lot

Hello guys, today, I am going to talk about a really powerful programming language for text processing - Perl. I first come across Perl 10 years ago while creating a Perl script to generate a report from log files. At that time, I know that when it comes to string and text processing, there is no match for Perl. It offers a lot of useful data structure and tools which makes loading data from file and process a lot easier than any other programming language. Since scripting is an important skill for a senior developer, knowing a programming language like Python or Perl can really make a difference.

Top 5 Online Courses to Learn Business Strategy in 2022 - Best of Lot

Hello guys, if you want to learn Business Strategy and looking for the best online courses then you have come to the right place. Earlier, I have shared many digital marketing courses like these actionable Twitter courses, Instagram Marketing course, and these best Facebook Marketing courses but we never discussed Business Strategy. But, don't worry, in this article, I am going to share the best online courses to learn Business Strategy in 2022. These are very actionable courses with actionable tips and tricks and filled with real-life experience. You can join a couple of these courses to learn the Business strategy and grow your business in 2022, but before that let's try to find out what is business strategy?

How do you find length of a Singly Linked list using Loop and Recursion? Example

Hello guys, here is one of the classical programming questions how do you find the length of a linked list using recursion and without recursion. This is not about the LinkedList class of Java API but the linked list data structure, which is made of nodes that contain both data and the address of the next node. In order to calculate the length, you need to count all nodes in the linked list. Since it's a singly linked list you can only move in one direction from the head to tail.  This coding problem was asked to me on my first interview with a multinational Investment bankAfter that, this question has been asked to me on several occasions in other Programming Job Interviews as well.

How to delete a key value pair from a HashMap during Iteration in Java - Example tutorial

Suppose you have a Map or Dictionaries like HashMap or Hashtable, which contains key-value pairs like books and their prices, and you want to delete all books whose prices are greater than 40 USD, how do you that in Java? This is one of the most common scenarios while developing Java applications and many Java programmers, will say that they will iterate over Map and check each entry and then use the remove(Object key) or remove(Object key, Object value) methods from java.util.Map to delete any mapping where the value is greater than 40 USD. Though the approach is right, the answer is wrong.

How to use Array in Java? Example Tutorial

The array is one of the most important data structures in any programming language, at the same time different programming languages implement and treat the array differently. Anyone who is done some programming knows the value of an array and the importance of knowing about array type, using them in their program. Together with a linked list, the array forms a set of basic data structures. Though Java offers excellent Collection API and some of the collection classes like ArrayList and  HashMap, they are internally based on the array.

Top 30 Java Phone Interview Questions Answers for Freshers, 1 to 2 Years Experienced

Hello guys and ladies, in this article, I am sharing 30 core Java technical questions, from screening and phone rounds of interviews. In telephonic interviews, questions are short, fact-based and Interviewer expects a to-the-point reply and some keywords in answers. Accordingly, I have given very short answers to all these questions, only the main points; just to make this a revision post and not the main source for preparation. For thorough preparation, my master list of 140+ Java questions is a better one to start with. I am also expecting every Java programmer to know answers to all these Java technical questions if he has more than 4 to 5 years of experience. It's only freshers and junior developers who need to do a bit of research to understand topics well.

5 Benefits of using interface in Java and Object Oriented Programming

Interface in Java is a simple concept but many programmers fail to realize their actual use, including me. When I started learning Java programming, I learned interface is something where you can declare functions but cannot define them. To me, they were useless at that time because there was no code to do anything. It took me years to realize how useful an interface can be. They are not intended to do things but they are actually facilitators. They provide abstraction and give the flexibility to change your program in the future. That's why it's very important for a Java programmer to understand the benefits of interfaces and realize how and when to use them in code. 

Top 15 Data Structures and Algorithm Interview Questions Answers for Java Programmer

Data structures and algorithm questions are an important part of any programming job interview, be it a Java interview, a C++ interview, or any other programming language. Since data structures are core programming concepts, it's mandatory for all programmers, to know basic data structures like the stack, linked list, queue, array, tree, and graph. Though trees and graphs are on the tougher side, I still see programmers get familiar will all these. Any list of programming job interview questions is incomplete without questions from data structures and algorithms. Similarly, while going on questions from data structure you may get some programming exercise as well e.g. swapping numbers without temp variable.

How to format/parse dates with LocalDateTime in Java 8 - Example Tutorial

One of the common tasks in a Java project is formatting or parsing data to String and vice-versa. Parsing date means you have a String that represents a date like "2017-08-3" and you want to convert it into an object which represents the date in Java, like java.util.Date in pre-Java 8 world and LocalDate or LocalDatetime in Java 8 world. Similarly, formatting a date means converting a date instance into a String, for example, you have a Date object or LocalDatetime object and you want a String in dd-MM-yyyy format. Java 8 API provides good support for formatting and parsing dates.

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

Difference between SOAP and RESTful Web Service in Java

Though both SOAP and RESTful web services allow a client to query the server for some information, the way they are implemented and used is quite different. The main difference between SOAP and REST is that the former provides a standard of communication between client, server, and other parties and has restricted a set of rules and format, while REST leverages the ubiquity of HTTP protocol, in both client and servers, to allow them to communicate with each other regardless of their implementation. In short, getting data from a RESTful web service requires less headache than getting data from a SOAP web service.

3 Ways to Read File line by line in Java 8? Examples

Java 8 has added a new method called lines() in the Files class which can be used to read a file line by line in Java. The beauty of this method is that it reads all lines from a file as Stream of String, which is populated lazily as the stream is consumed. So, if you have a huge file and you only read the first 100 lines then the rest of the lines will not be loaded into memory, which results in better performance. This is slightly different from the Files.readAllLines() method (which reads all lines into a List) because this method reads the file lazily, only when a terminal operation is called on Stream like forEach(), count(), etc. By using the count() method you can actually count a number of lines in files or the number of empty lines by filtering empty lines.

When to use intern() method of String in Java? Example

The String.intern() method can be used to deal with the String duplication problem in Java. By carefully using the intern() means you can save a lot of heap memory consumed by duplicate String objects. A String object is said to be duplicated if it contains the same content as another string but occupied a different memory location e.g. str1 != str2 but str1.equals(str2) is true. Since the String object consumes a large amount of heap memory in the average Java application, it makes sense to use the intern() method to reduce duplication and take advantage of the String pool feature provided by Java. You can use the intern() method to intern a String object and store them into the String pool for further reuse.

2 Examples to read Zip Files in Java, ZipFile vs ZipInputStream - Tutorial

ZIP format is one of the most popular compression mechanisms in the computer world. A Zip file may contain multiple files or folders in compressed format.  Java API provides extensive support to read Zip files, all classes related to zip file processing are located in the java.util.zip package. One of the most common tasks related to zip archive is to read a Zip file and display what entries it contains, and then extract them in a folder. In this tutorial, we will learn how to do this task in Java. There are two ways you can iterate over all items in a given zip archive, you can use either java.util.zip.ZipFile or java.util.zip.ZipInputStream. Since a Zip file contains several items, each of them has a header field containing the size of items in a number of bytes. This means you can iterate all entries without actually decompressing the zip file.

How to make RESTful Web Services using Spring Boot and Java - 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 langauge. How to make Spring boot REST API? is a common question that everyone has who is new to Spring boot application development. 

How to split a comma separated String in Java? Regular Expression Example

You can use the String.split() function or StringTokenizer class to split a comma-separated String in Java. Since splitting a String is a very common functionality, Java designers have provided a couple of split() methods on java.lang.String class itself. These split() function takes a regular expression and split the String accordingly. In order to parse a comma-delimited String, you can just provide a "," as a delimiter and it will return an array of String containing individual values. The split() function internally uses Java's regular expression API (java.util.regex) to do its job.

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.

How to access Private Field and Method Using Reflection in Java? Example Tutorial

Reflection in Java is a very powerful feature and allows you to access private methods and fields which is not possible by any other means in Java and because of this feature of reflection many code coverage tools, static analysis tools,s and Java IDE like Eclipse and Netbeans has been so helpful. In the last article, we have seen details about private keywords in Java and learned why we should always make fields and methods private in Java. There we have mentioned that private fields and methods are only accessible in the class they are declared but with reflection, you can call the private method and access private fields outside the class. In this article, we will see a simple example of accessing a private field using reflection and invoking a private method using reflection in Java.

How Volatile in Java works? Example of volatile keyword in Java

What is a volatile variable in Java and when to use the volatile variable in Java is a famous multi-threading interview question in Java interviews? Though many programmers know what is a volatile variable they fail on the second part i.e. were to use volatile variables in Java as it's not common to have a clear understanding and hands-on on volatile variables in Java. In this tutorial, we will address this gap by providing a simple example of the volatile variable in Java and discussing when to use the volatile variable in Java. Anyway,  the volatile keyword in Java is used as an indicator to Java compiler and Thread that do not cache the value of this variable and always read it from the main memory.

So if you want to share any variable in which read and write operation is atomic by implementation like reading and write in an int or a boolean variable then you can declare them as a volatile variable. 

12 Examples of ConcurrentHashMap in Java

Hello guys, if you are new to Java programming and want to learn ConcurrentHashMap class in Java then you have come to the right place. Earlier, I have shared the best books and best courses to learn Java, and today, I am going to share 10 examples of using ConcurrentHashMap in Java. As a Java programmer, you might have heard about the ConcurrentHashMap class of java.util.concurrent package. If you don't let me tell you that ConcurrentHashMap is an important class in Java and you will often find yourself dealing with this class in a multithreaded and concurrent Java application. If you are wondering where to start and how to master this essential Java class then you have come to the right place.

Top 6 Online Courses To Learn Computer Security for Beginners in 2022 - Best of Lot

Hello guys, If you want to learn Computer Security and looking for the best courses to learn Computer Security then you have come to the right place. Earlier, I have shared the best Cyber Security Courses and best Web Security courses and in this article, I am going to share free online courses to learn Computer Security for beginners, both tech and non-tech people. Computer security is a complex field of learning but must for everybody learn to protect themselves and their companies from letting bad people access your sensitive information they shouldn’t access. 

Top 5 Online Courses to Learn Public Speaking in 2022 - Best of Lot

Hello guys, if you want to work on your public speaking skills in 2022 and looking for the best courses then you have come to the right place. Earlier, I have shared the best management skill courses and best free personal development courses and in this article, I am going to share the best online courses to learn public speaking in 2022. This is one of the skills which is very important to grow in your career and not just for non-technical people but also for technical and IT professionals like Tech leads, Senior Developers, Business Analysts, and Project Managers. It's not easy to speak in front of people and I have seen even experienced hand-tumble and hesitate, even while speaking with an online audience, but at the same time, it's also an opportunity to thump your authority and establish yourself as an expert. 

Top 50 Java Thread Interview Questions Answers for 2 to 5 Years Experienced

You go to any Java interview, senior or junior, experience or freshers,  you are bound to see a couple of questions from the thread, concurrency, and multi-threading. In fact, this built-in concurrency support is one of the strongest points of the Java programming language and helped it to gain popularity among the enterprise world and programmers equally. Most of the lucrative Java developer position demands excellent core Java multi-threading skills and experience in developing, debugging, and tuning high-performance low latency concurrent Java applications. This is the reason, it is one of the most important topics in Java interviews. Multithreading and concurrency are also hard to master the concept and only good developers with solid experience can effectively deal with concurrency issues.

Top 5 Courses to Learn Swagger or Open API for Beginners in 2022 - Best of Lot

 Hello guys, if you want to learn Swagger and looking for the best online courses then you have come to the right place. In the past, I have shared the best REST API courses as well best Postman courses, one of the best tools to test REST API and in this article, I am going to share the best online courses to learn Swagger in 2022. I have curated this list from my favorite online learning platform like Udemy, Pluralsight,  and Coursera and they are suitable for both beginners and intermediate developers who want to master the Swagger tool. But before we jump into these courses Let us start with the simple stuff first. What exactly is Swagger and Open API?

Top 5 Online Courses to Learn Instagram Marketing in 2022 - Best of Lot

Hello guys, if you are wondering how to market your course or your product on Instagram, one of the popular social networks, particularly for creators then you have come to the right place. Earlier, I have shared the best Twitter marketing course and a lot of you asked to share similar courses for Facebook and Instagram marketing and here we are with the best Instagram marketing courses in 2022. There are more than 1.3 billion people using Instagram in 2021. So we can securely say that Instagram has a big influence over the world. Since there are so many people using the platform, why not take advantage of it and grow your business with it?

Top 5 Courses to Learn Apache Camel in 2022 - Best of Lot

Hello guys, if you are looking for the best online courses to learn Apache camel then you have come to the right place. Earlier, I have shared the best courses to learn Spring framework, Spring Boot, and Spring Cloud, and today, I am going to share the best online courses to learn Apache Camel. Let us get the simple things out of the way first. What exactly is Apache Camel? It is essentially a black box that receives a message from one point and sends it to another one. It's also one of the most popular open-source integration tools for Java applications. It provides integration solutions based upon popular Enterprise Integration patterns. 

Top 5 Online Courses to Learn REST Assured for Testing in 2022 - Best of Lot

Hello guys, if you want to learn REST Assured tool for testing your API and RESTful Web services and looking for the best online courses to learn REST Assured then you have come to the right place. In the past, I have shared the best online courses to learn various REST API development tools like Postman, SoapUI, and Selenium, and today, I am going to share the best REST Assured courses to learn this useful tool in 2022. These are the best resource I can find to learn REST assured, particularly when it comes to choosing online courses and they are from popular online platforms like Udemy and Pluralsight. You can join one or two of these courses to master this excellent tool to automate your REST API Testing.

Top 5 Online Courses to Learn Google Sheet for Beginners in 2022 - Best of Lot

Hello friends! we meet again today and are surely gonna learn something fantastic cause as they say 'knowledge never fades!'. So, today we are gonna learn something that is very familiar and related to me as I type this. Today we are gonna review some of the best Google Sheet online courses that are present in the market.

So, what's the wait? Let's start!

All of you must have used Excel or any other spreadsheet program by now. Google Sheets is a spreadsheet tool that is included with Google's free, web-based Google Docs Editors suite. Google Docs, Google Slides, Google Drawings, Google Forms, Google Sites, and Google Keep are all part of the service. Let's see some of the best available courses to learn it.