Top 5 Courses to Crack Frontend Web Developer Interviews [HTML, CSS, and JavaScript] in 2023 - 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. 

Top 10 Online Courses to Crack Coding Interviews in 2023 - Best of Lot

To be honest with you, getting your first job is never easy. It is, in fact, the most laborious task, and you need to put your best effort into finding a role in your dream company. Most of the computer science graduates dream of working for Google, Facebook, Amazon, Microsoft, and Apple, but they are often not able to clear their rigors coding interviews. The single most important reason for failing those coding job interviews is a lack of knowledge and practice; hence, it becomes increasingly important that you prepare hard in advance. Unfortunately, I learned this little too late after spoiling my chances at Microsoft and Amazon, but you can learn from my experience and prepare better for your programming job interviews.

Coursera's Google IT Support Professional Certificate Review! - Is it worth in 2023?

Hello there, if you are looking for a cost-effective and recognized IT training program to start your career in IT support then you have come to the right place. In this article, we'll review Google IT Support Professional Certificate from Coursera which can be used to launch your career in IT support in 2023. This is one of the most popular Coursera certification from Google and also one of the best structured and many beginners have joined this program, close 10 1million (precisely 969,000) which is a testament of the value this certification provides. If you are trying to get involved in the IT industry at an entry-level may be because you need to be a programmer web developer, or even cisco certified so you have to learn the basics of information technology, or maybe just for fun and learn how things work and educate yourself more about this amazing industry.

How to implement Command Design Pattern in Java with Example

Hello guys, it's been a long since I have shared a Java design pattern tutorial. I did share some courses to learn design patterns but haven't really talked about a particular design pattern in depth. So, today, we'll learn one of the important design pattern, which is often overlooked by Java developers. Yes, I am talking about the Command Pattern which can help you write flexible, loosely coupled code for implementing actions and events in your application. In simple words, the command design pattern is used to separate a request for action from the object which actually performs the action. This decoupling between Invoker and Receiver objects provides a uniform way to perform different types of actions. This decoupling is achieved using a Command object, which is usually an interface with methods like execute(). 

StringJoiner.join() and String.join() Example in Java 8

Hello guys, joining multiple String literals or objects into one is a common programming requirement and you will often find situations where you need to convert a list of String or a Collection of String into a CSV String for your application. For a long time, JDK API has no way to join multiple String literals or objects together, which forces programmers to write hacks like looping through all String objects and manually joining them using String concatenation to create the final, joined String. Even though this approach worked, it was filled with errors and hacks like you need to be careful not to add delimiter before the first element and after the last element, which often caused issues, particularly in the case of beginners and junior Java developers.

How to sort an Array in Java? Ascending and Descending Order Example

As a Java programmer, quite often you would need to sort array in Java luckily java.util.Arrays class provides several utility methods to sort an array in Java. You can sort different types of array in Java like array of primitive data types, object or int, String, etc. Arrays are in java.util package and exposed all sorting related methods as static utility functions. you can access sort() as Arrays.sort() and just pass your array and it will sort that array object by comparing them in the order implemented in the compareTo() method if the class implements Comparable interface. You can also sort arrays in ascending order, descending order, or any custom order defined by the custom comparator in Java.

How to loop through an Array in Java? Example Tutorial

Hello there, If you want to loop over an array in Java but not sure how to do that then you have come to the right place. Earlier, I have shared many Java array tutorials and the best Java courses for beginners, and today, I am going to teach you how to iterate over an array in Java. There are multiple ways to loop over an array in Java, like you can use a for loop, an enhanced for loop, a while loop, or a do-while loop. Since while and do-while needs a condition to terminate they often depend upon the content of the array like stop when the current element is null or even or odd etc. If you just want to iterate over an array to access each element like loop over an array and print each entry then you should use either for loop or the enhanced for loop.

How to declare and initialize a List with values in Java (ArrayList/LinkedList) - Arrays.asList() Example

Hello guys, today, I am going to share with you a useful tip to initialize a List like ArrayList or LinkedList with values, which will help you a lot while writing unit tests and prototypes. Initializing a list while declaring is very convenient for quick use, but unfortunately, Java doesn't provide any programming constructs like the collection literals of Scala, but there is a trick which you can use to declare and initialize a List at the same time. This trick is also known as initializing a List with values. I have used this trick a lot while declaring list for unit testing and writing demo programs to understand an API etc and today I'll you'll also learn that.

Top 6 Microsoft Excel Online Courses for Beginners in 2023 - Best of Lot

Hello guys, If you are learning Microsoft Excel or want to learn Excel and looking for the best online courses, you have come to the right place. In the past, I have shared some advanced Excel courses to learn things like VBA and Macros, and in this article, I am going to share more comprehensive Excel courses to learn Microsoft Excel in depth. These are the best MS Excel courses from sites like Udemy, Pluralsight, and Coursera, and thousands of programmers, developers, tech, and non-tech people have joined these courses to learn this valuable skill, and you can do the same. Microsoft Excel is one of the most essential tools for IT professionals. It's not only the most common spreadsheet tool but also offers powerful charting and analytical capability.

Educative Review - Is Grokking the Coding Interview Pattern course Worth It?

Hello guys, if you are looking for a great course to start your coding interview preparation or you have heard about Educative's popular Grokking the Coding Interview Pattern course but not sure whether its worth it or not then you have come to the right place. Earlier, I have shared best Coding Interview courses, books, websites, and Coding interview questions and in this article, I am going to review one of favorite Educative course, Grokking the Coding Interview: Patterns for Coding Questions. Before finding this course, I have attended many course on coding interviews on Udemy, Pluralsight, and YouTube, most of the courses will teach you how to solve common coding problems like finding duplicates in array, reversing the linked list, and many Leetcode style problems but this course is different. 

How to find Middle Element of Linked List in Java in Single Pass

ow do you find the middle element of LinkedList in one pass is a programming question often asked Java and non-Java programmers in telephonic Interview. This question is similar to checking palindrome or calculating the factorial, where the Interviewer sometimes also asks to write code. In order to answer this question candidate must be familiar with the LinkedList data structure i.e. In the case of the singly LinkedList, each node of Linked List contains data and pointer, which is the address of the next Linked List and the last element of Singly Linked List points towards the null. Since in order to find the middle element of the Linked List you need to find the length of the linked list, which is counting elements till the end i.e. until you find the last element of the Linked List.

How to implement Skip List in Java? Example Tutorial

Hello friends, we meet again today. hope you all are excited and ready for today's journey. Today, we are gonna learn something that is not very common. It is used not very common, but, if used, it is a great strength to our time complexity reduction. So, what's the wait? Let's start! So, suppose we have a linked list with us which has 10 million records. Now, for searching a particular node, the time taken would be O(N). Where N is the size of the list. Similarly, the time taken for deletion of a Node, Insertion at a particular Node will also take O(N) time. Can we reduce it?

[Solved] How to find the 3rd (kth) Node from end or tail in linked list in Java? Fast and Slow Pointer Example

Hello guys, the problem to find the 3rd element from the end in a singly linked list or Kth node from the tail is one of the tricky but frequently asked linked list problems in Programming job interviews. I know you can easily solve this problem by moving from tail to head or in the reverse direction but the main challenge here is to solve the problem in just one pass. That means, you can not traverse the linked list again and you cannot traverse backward because it's a singly linked list. So what do you think? Isn't this problem challenging? Well, I did struggle when I saw this problem very first time but once you understand the logic and some tricks to solve a linked list based problem like Recursion then it would be easy for you, and that's what you will learn in this article.

Top 5 Websites to Learn Java Coding for FREE - Best of lot

Hello guys, if you want to learn Java Programming and looking for the best websites to learn Java coding for free then you have come to the right place. In the past, I have shared the best Java courses and books, today, I am going to share free websites to learn Java Programming for free. being the author of a Java blog and programmer I often receive questions like how to improve my coding skills?,  or how do I learn to code in Java?, or I am having difficulty solving programming problems, please help, etc. This is mostly from programmers who have just started programming or computer science graduates with a programming degree or even some programmers with a year or two in Job.

Can a Non Static Method Access a Static Variable/Method in Java?

"Can a non-static method access a static variable or call a static method" is one of the frequently asked questions on the static modifier in Java, the answer is, Yes, a non-static method can access a static variable or call a static method in Java. There is no problem with that because of static members i.e. both static variable and static methods belong to a class and can be called from anywhere, depending upon their access modifier. For example, if a static variable is private then it can only be accessed from the class itself, but you can access a public static variable from anywhere.

How to Learn Java Online? 3 Best ways to become a Java Developer in 2023

Hello guys, if you want to learn Java and wondering what is the best way to learn Java in 2023 then you have come to the right place. In the past, I have shared many useful resources to learn Java programming and development like the 2023 Java Developer RoadMap, best Java courses, best Java books, and this list of best websites to learn Java for FREE, and in this article, I will tell you the best way to learn Java in 2023. Even if you don’t have any experience in programming, you might have heard the term “Java”. Java is one of the most common and popular terms in the programming world. It is because Java is one of the most popular programming languages in the world and it is existing since the mid-90s. Not only does Java exist even today, but it has also managed to occupy the top positions in all those years.

Top 10 Coursera Certifications for Data Science, Data Analysis, and Data Visualization in 2023 - Best of Lot

Hello guys, If you are keen to start your career in Data Science, Data Analysis, and Data Visualization field and looking for the best Coursera certifications, courses, specializations, and projects, then you have come to the right place. In the past, I have shared the best Coursera courses and certifications to learn Artificial Intelligence, Python, Software Development, Cloud Computing, and Web Development, and, in this article, I am going to share the best Coursera courses, projects, certifications, and specializations for Data Science, Data Visualization and Data Analysis from reputed universities like Johns Hopkins and industry leaders and tech companies like IBM and Google

How to find If Linked List Contains Loop or Cycle in Java? Example Solution

Write a Java program to check if a linked list is circular or cyclic,  and how do you find if a linked list contains loop or cycles in Java are some common linked list related data structure interview questions asked in various Java Interviews. This is sometimes asked as a follow-up question of basic linked list questions like inserting an element at the beginning, middle and end of a linked list or finding the length of linked list. In order to solve linked list related algorithmic questions in Java, you need to be familiar with the concept of singly linked list, doubly linked list, and circular linked list. Until stated specifically, most questions are based on a singly linked list. For those who are not familiar with the linked list data structure, its a collection of nodes.

How to enclose a list of values into single quotes for SQL query? Microsoft Excel Example

Many times you get a list of values that you want to check in the database to confirm if they exist in your tables or to get more information bout them. For example, you got a list of 100 stocks and you want to check their last day closing prices in the database. The problem arises when values to be searched are Strings like VARCHAR or CHAR because VARCHAR values need to be enclosed in the single quotes in most of the database like SQL Server, Oracle, or MySQL. If a number of values are less than 5 then it makes sense to add single quotes around them and separate them by comma manually so that you can use them on IN clause of your SQL query, but if it's more than 5 like 50 or 100 then manually enclosing them into single quotes will take a lot of time and most importantly programmers are not supposed to do such silly stuff manually.

How to create Tabs UI using HTML, CSS, jQuery, JSP and JavaScript? Example

JSP is still a popular technology for developing view part of Struts and Spring-based Java applications, but unfortunately, it doesn't have rich UI support available in GWT, or any other library. On another day, we had a requirement to display HTML tables inside tabs, basically, we had two tables of different data set and we need to display them in their own tabs. Users can navigate from one tab to another, and CSS should take care of which tab is currently selected, by highlighting the active tab. Like many Java developers, our hands-on HTML, CSS, and JavaScript are a little bit tight than a web guy, and since our application is not using any UI framework, we had to rely on JSP to do this job.

Top 5 books to Learn Object Oriented Programming and Design - Must Read, Best of Lot

The OOP or Object Oriented Programming is one of the most popular programming paradigms which helps you to organize code in the real-world system. It's a tool that allows you to write sophisticated software by thinking in terms of objects and relationships. Unlike its predecessor procedural Programming paradigm, which is implemented most notably by C, which solves the problem and complete task by writing code for computers, the OOP style of programming allows you to think in terms of real-world objects which have both state and behavior. You can view anything as objects and then find their state and behaviors, this will help you to simulate that object in code.

Top 10 Websites and Online Platforms to Learn Git for FREE in 2023 - Best of Lot

Hello guys, like many programmers, I have also worked with a lot of source control systems like SVN, CVS, TFS, VSS, Mercury, and I had always wondered why so many source control systems? Why not just one. It's one of the necessary software tools for development, and everyone needs a version control and code repository, there should be a standard solution. It seems Git and Github have solved that problem now. Now, Git is everywhere from open source to closed source, from small startups to big Investment banks, but there were still legacy projects which were lying on SVN and CVS, but they are now also started moving towards it.

How to use Adapter Design Pattern in Java with Example

The adapter design pattern in Java, also known as the Wrapper pattern is another very useful GOF pattern, which helps to bridge the gap between two classes in Java. As per the list of Gang of Four patterns, the Adapter is a structural pattern, much like Proxy, Flyweight, Facade, and Decorator patterns in Java. As the name suggests, the Adapter allows two classes of a different interface to work together, without changing any code on either side. You can view the Adapter pattern as a central piece of the puzzle, which joins two pieces, which can not be directly joined because of different interfaces.

How to fix tibrvnative.dll : Can't load IA 32-bit .dll on a AMD 64-bit platform? Solution

Can't load IA 32-bit .dll on an AMD 64-bit platform is a generic error, which comes when a 64-bit process tries to load a 32-bit dll, but when it comes it's not that easy to resolve. One of my readers was getting this error tibrvnative.dll : Can't load IA 32-bit .dll on an AMD 64-bit when he was trying to install Tibco Rendezvous 8.2 on his Windows 8 HP Laptop. He was working on a Java application that was dependent upon Tibco Rendezvous for inter-process communication. After installing Tibco on his machine he was having a hard time running his Java application, first, he was getting errors like java.lang.UnsatisfiedLinkError: no tibrvnative in java.library.path and after resolving that he was getting a new error tibrvnative.dll: Can't find dependent libraries.

What is the Use of Interface in Java and Object Oriented Programming? [Answer]

Many times, I have seen questions like why should we use an interface in Java? If we can not define any concrete methods inside the interface the what is the user of the interface? Or even more common, What is the real use of the interface in Java? I can understand beginners asking this question when they just see the name of the method inside the interface and nothing else. It takes time to realize real goodness or actual use of interface or abstraction in Java or any object-oriented programming. One reason for this is a lack of experience in really modeling something real in the program using object-oriented analysis and design. In this article, I will try to answer this question and give you a couple of reasons to use the interface in your code. If you have a good understanding of Object-oriented basics like Polymorphism, then you know that it allows you to write flexible code.

Difference between Inheritance and Composition in Java and Object Oriented Programming

Though both Inheritance and Composition provide code reusability, the main difference between Composition and Inheritance in Java is that Composition allows reuse of code without extending it but for Inheritance, you must extend the class for any reuse of code or functionality. Another difference that comes from this fact is that by using Composition you can reuse code for even the final class which is not extensible but Inheritance cannot reuse code in such cases. Also by using Composition, you can reuse code from many classes as they are declared as just a member variable, but with Inheritance, you can reuse code from just one class because in Java you can only extend one class because multiple Inheritance is not supported in Java.

Top 9 Blockchain Courses & Certifications For Beginners in 2023 - Best of Lot

Hello folks, if you are not living under the rock, you would have definitely heard about Blockchain and Cryptocurrencies. Blockchain is one of the most in-demand skills, and there are not many people out there. If you want to learn Blockchain and related technologies like Ethereum, Solidity, Hyperledger, etc., and are looking for Blockchain training courses and certification, you have come to the right place. But, before that, let's get a quick overview of what Blockchain is, why it's popular, and why you should learn Blockchain in 2023.

Top 6 Courses to Learn Code Refactoring for Experienced Java Programmers in 2023 - Best of Lot

Hello guys, if you want to improve your coding skills, learn to refactor and other coding best practices,  and look for the best online courses to improve your coding skills, refactoring, and other best practices, then you have come to the right place. Earlier, I shared the best design pattern courses and best Data Structure and Algorithms courses, and today, I will share the best online courses you can join to improve your coding and programming skills. Coding skill is one of the most important differentiators when it comes to getting a programming job. It's simple, if you can't code, you can't go up the ladder, and you can't get better jobs. 

Top 10 Coursera Courses and Certifications to Learn Web Development in 2023 - Best of Lot

Hello guys, If someone asked me 10 years ago about how to learn web development and get a job I would more likely say that you have to go to college and get your Bachelor’s degree and then try to get a job or internship. In short, it was only possible to become a web developer by spending years on education and thousands of dollars, now the internet has changed the game nowadays. These days many online platforms like Coursera, Udemy, Pluralsight, CodeCademy, and Educative appeared to the world allowing people o take online training courses in almost any industry and web development is one of them. 

Top 5 Courses to Learn TerraForm in 2023 - Best of Lot

Hello folks, if you have done infrastructure deployment like creating a server, installing applications, and creating a production environment then you know that deploying and maintaining traditional infrastructure is a manual task fraught with repetitive tasks, inconsistent configuration, and always out-of-date documentation. Terraform is an essential DevOps tool that is used to version infrastructure as code. If you want to learn Terraform in 2023 then you have come to the right place. In the past, I have shared the best DevOps courses and best online courses to learn essential DevOps tools like Docker, Jenkins, and Kubernetes, and today I am going to share the best online courses to learn Terraform in 2023. The list contains courses for both beginners and experienced engineers.

Top 5 AWS Solution Architect Associate Certification Practice Test and SAA-C02 / SAA-C03 Exam Dumps in 2023

Hello guys, if you are preparing for the AWS Certified Solutions Architect Associate (SAA-C03 and SAA-C02) certification exam and looking for challenging practice tests to assess your preparation then you have come to the right place. In this article, I am going to share the best Practice test and questions to prepare for the AWS Solution Architect Associate  (SAA-C03 and SAA-C02) exam from Udemy, Whizlabs, and other portals, totaling more than 2000+ practice questions. These practice tests are created by AWS experts and certified developers and Solution architects like Stephane Maarek and Cloud guru Ryna Krooneberg. Mock simulators play an important role in any certification and the AWS Solution Architect Associate-level exam is no different.

Top 6 Free Game Development Courses for Java and Unity Developers in 2023 - Best of Lot

If you are a programmer with a passion for game development or a computer science graduate who wants to become a Game Developer for the console, Android, or iOS device and looking for some excellent courses to start with, then you have come to the right place. In this article, I am going to share some of the best Game Development courses which are entirely free using Unity, Corona, and LibGDX, three of the most popular game engines for Programmers and Game Developers. While LibGDX is Java-based and Unity is C# based but probably the most popular game engine at this moment. Unity Game engine is both powerful and free, which makes it ideal to use for game development. If you don't know, Unity is the same software used to create Pokemon Go and many other best selling mobile games!

Top 5 Free iOS App Development Courses for Beginners in 2023 - Best of Lot

If you are thinking to learn iOS App development like developing games and applications for Apple's iOS devices like iPhone and iPad and looking for some free courses then you have come to the right place. In this article, I am going to share five free courses to learn iOS App Development and become the iOS developer you always wanted to be. This is the third article in my series of articles about learning iOS and venturing into app development using Swift. In my previous article, I have shared some of the best-paid courses to learn iOS development you can take to become an iOS developer this year and some free courses to learn Swift Programming language, Apple's own language to create iOS applications.

Top 5 Free Courses to Learn Microsoft SQL Server and T-SQL in 2023 - Best of Lot

Hello there, welcome to my blog. The Microsoft SQL Server is not just one of the popular database solutions but also one of the most complicated software offerings from Microsoft. It requires you to have a foundation in networks, databases, and programming. This wide range of skills is often challenging to obtain without rigorous learning and years of hands-on experience. Since it's difficult to learn and master the demand for expert SQL Server DBAs and Programmers is always high, particularly in the banking sectors. I know many of my friends in London and all around the world become SQL Server DBAs after starting as a programmer just to work on those big banks and earn very high salaries.

Review - Is Certified NFT Professional (CNFTP) on 101 Blockchains worth it?

Hello guys Non-fungible tokens (NFTs) have evolved as one of the interesting technological trends and lot of people want to jump into NFT train. If you also want to learn NFT and looking for the best NFT certification then you have come to the right place. Earlier, I have shared best paid NFT online courses as well as best free NFT courses and in this article, I am going to review one of the best NFT certification from 101 Blockchains, the certified NFT Professional certification. In this article, you will find out whether a Certified NFT Professional certification is worth it or not. We will deep dive into this NFT course and figure out the strong and weak points of this course and check if this CNFTP certification is any good or not, and then evaluate whether the price you pay for this NFT certification is justified or not.

Top 5 Courses to learn Pandas and Python Data Analysis for Beginners in 2023 - Best of Lot

Pandas is one of the most potent and popular Python libraries for Data Analysis. It's also one of the favorite tools for Data scientists because it helps them in cleaning, transformation, manipulation, and analysis of Data. To be honest, data in the real world is messy, and before you can start with your analysis, you need to clean and transform the data in the format you want. A tool or library like Pandas really helps there. That's why it's essential to learn about Pandas while doing Data Analysis with Python. It's even more critical if you are in the field of Data Science and Data Analysis. If you know Pandas, well and good, but if you don't mind, as I am going to share some of the best online courses to learn Pandas and Data Analysis with Python in 2023.

Top 5 Apache Spark Online Courses in 2023 - 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 something which is immensely practical and has the potential to land you very high paying jobs. Today we are gonna take a look at the best available Apache Spark courses online. Apache Spark is one of the most popular Big Data Framework and powering many companies Big Data processing. Earlier, I have shared the best courses to learn Hadoop and Big Data and many of you asked to share the best courses on Apache Spark so here we are with the best online courses to learn Apache Spark. 

Top 10 DevOps Courses for Experienced Programmers to Learn Online in 2023 - Best of Lot

DevOps is really hot at this moment, and many job opportunities are lying for distinguished engineers and DevOps professionals. If you are an experienced Java programmer and want to become a DevOps engineer, then you have come to the right place. In this article, I am going to share some of the best online training courses you can take to become a DevOps professional. The most crucial advantage of DevOps is that it helps you to deliver better software and provide more control over your environment and software development process with the help of modern tools and automation. That's the reason the demand for DevOps professionals is growing exponentially. It's also one of the high-paying jobs along with Data Science and Machine learning specialists.

Top 5 Free Apache Kafka Courses for Beginners in 2023 - Best of Lot

With the new year approaching soon, many of us will be excited about it, as a new year means a new beginning. For that beginning, some of us have planned some objectives like working on our physique, learning some new language, learning a demanding skill to boost our career, or beginning our professional career with some greatly advancing opportunities. Here, I am presenting you, a very demanding skill with which many of you are familiar. Apache Kafka, the modern-day advanced analytics chatting service used by big organizations like Uber, Airbnb & much more to handle thousands of conversations routinely. It's also one of the essential skills for Java developers and I have included in my list 22 tech skills for Java developers. 

Top 5 Python Course for Data Science and Machine Learning in 2023 - Best of Lot

Hello guys, if you want to learn Data Science with Python and looking for the best Python courses for Data Science, then you have come to the right place. In the past, I have shared the best Python courses for beginners, best Python books, websites, and Python projects, and in this article, I am going to share the best Python course for Data Science. If you want to become a Data Scientist or just want to take your Python skills to the next level from a data science point of view, you can join these courses. I have created these best Python courses from popular websites like Udemy, Coursera, and Pluralsight. I have also included python online courses for both beginners and intermediate Data Scientists. They not only cover python but also essential Python libraries for Data Science like Pandas, NumPy, etc. 

Top 5 Courses to Learn Shell scripting in Linux (bash, ksh, csh) Online in 2023 - Best of Lot

Hello guys, you might know that a massive chunk of a developer's time is wasted in trying to repeat tasks and commands, especially when it comes to working with a bunch of UNIX or Linux machines, and a good knowledge of shell scripting can free you from such mundane task and give time to do some interesting stuff. If you don't know what shell scripting is then let me tell you is nothing but a program written using shell built-ins, and Linux commands to automate things, like checking if a host is reachable or finding and deleting large files that are older than certain days or archiving them into another machine.

Top 5 Dart and Flutter Online Courses for Beginners in 2023 - Best of Lot

If you have been following tech development then you know may know that Dart is another programming language created by Google.  Along with Golang, Angular, and Flutter, Dart is also incorporates best practices from existing platforms and tries to minimize the friction. Dart was originally launched in 2011 but it really picked up lately.  The last few years have seen a phenomenal rise in Dart programming language, mainly because of Flutter, a popular framework from Google for developing cross-platform native mobile applications for Android and iOS platforms. Dart is also one of the most loved programming languages on the StackOverFlow survey and is designed for Developer productivity. It is somewhere between Java and JavaScript.

Top 7 Figma Online Courses for UI and UX Design in 2023 - Best of Lot

Hello guys, if you want to learn Figma in 2023, one of the most popular U.I. and UX design tools, and looking for the best online courses, then you have come to the right place. Earlier, I shared the best web design courses and best web development courses, and in this article, I will share the best courses to learn Figma for U.I. and UX design in 2023. Having a good-looking website is not only beneficial but also necessary in today's world, and that's why U.I. and UX design skill is in high demand. There are a lot of jobs in both big and small companies for expert designers, and knowledge tools like Figma are going to improve your U.I. design skill for sure. 

Top 6 Object Oriented Programming and Design Courses for Java Programmers in 2023 - Best of Lot

There is no doubt that Object-oriented programming is a pillar of software development and one of the reasons for the massive success of Java. Good knowledge of Object-oriented programming helps you to create better software. It also allows you to communicate your ideas better with your team members and fellow programmers. Despite being such an important technology, it's difficult to find programmers who understand OOP well. Many programmers just think that OOP is nothing more than Abstraction, Inheritance, Encapsulation, and Polymorphism, without genuinely understanding these concepts and mastering them.

Top 5 Free Git Courses for Programmers to Learn Online in 2023 - Best of Lot

One of my goals is to learn and master Git and Github this year and I have been searching for some good tutorials and courses to start with. The Internet is full of git tutorials and a simple Google search will leave you thousands of tutorials but the big question mark is where do you start? It's easy to pick a tutorial or a blog post if you have some background about what is Git, what it does? and how to use it but if you don't have much background then you need a course that can tell you all the information from the ground up. I personally like learning from a book or an online course before moving to blog posts as they were often well structured.

java.lang.UnsatisfiedLinkError: no dll in java.library.path - Cause and Solution

"Exception in thread "main" java.lang.UnsatisfiedLinkError: no dll in java.library.path" is one of the frustrating errors you will get if your application is using native libraries like the DLL in Windows or .SO files in Linux. Java loads native libraries at runtime from either PATH environment variable or location specified by java.library.path system property depending upon whether your Java program is using System.load() or java.lang.System.loadLibarray() method to load native libraries. If Java doesn't find them due to any reason it throws "java.lang.UnsatisfiedLinkError: no dll in java.library.path". 

How to Fix java.lang.UnsatisfiedLinkError: lwjgl64.dll : Access Denied Error? Miecraft Solution

You can resolve java.lang.UnsatisfiedLinkError: lwjgl64.dll : Access Denied error in Minecraft by disabling your anti-virus and run. Later you can whitelist the lwjgl64.dll so that your anti-virus will not block it again. I have talked about java.lang.UnsatisfiedLinkError a couple of times on this blog e.g. here and here. But, today I am going to show you one more real-life example of java.lang.UnsatisfiedLinkError, which is more interesting. We'll also learn and how to deal with that. This problem is related to Minecraft, one of the most popular games written in Java. Precisely, we are going to solve the "Exception in thread "main" java.lang.UnsatisfiedLinkError: lwjgl64.dll: Access denied" error.

Top 10 Blender Online Courses to Learn 3D Modeling in 2023 - Best of Lot

Hello guys, if you want to learn Blender and 3D modeling in 2023 and looking for the best blender and 3D modeling online courses and other learning resources then you have come to the right place. In the past, I have shared the best courses to learn Unity game engine and Unreal engine courses and in this article, I am going to share the best online courses to learn Blender and 3D modeling in 2023. When you watch some animated movies and you see the gorgeous design of the 3D character you may be wondering about how they design them and what that process is called. Well, it knows as 3D modeling which is a process that makes the computer create a 3D representation of those characters or any shape you see that is 3D, like homes cars the environment, and so on.

Top 7 Python Data Structures and Algorithms Courses in 2023 - Best of Lot

Hello Python developers, if you want to learn Data structure and Algorithms in the Python Programming language and look for the best online courses, you have come to the right place. In the past, I have shared a lot of valuable resources like free data structure courses, books, and tutorials to learn Data Structure and Algorithms for programmers. I have also shared a lot of Algorithmic interview questions and their solutions in Java. Still, I have constantly been getting queries about good courses to learn Data Structure and Algorithms in Python and JavaScript. Even though the topics are completely independent of the programming language, Python developers definitely like the classes and books that teach Python's data structure and algorithms.

Spring Boot Error - Error creating a bean with name 'dataSource' defined in class path resource DataSourceAutoConfiguration

Hello guys, If you are using Spring Boot and getting errors like "Cannot determine embedded database driver class for database type NONE" or "Error creating a bean with name 'dataSource' defined in class path resource ataSourceAutoConfiguration" then you have come to the right place. In this article, we'll examine different scenarios on which this Spring Boot error comes and what you can do to solve them. The general reason for this error is Spring Boot's auto-configuration, which is trying to automatically configure a DataSource for you but doesn't have enough information. It is automatically trying to create an instance of DataSourceAutoConfiguration bean and it's failing.

Difference between WHERE vs HAVING clause in SQL - GROUP BY Comparison with Example

What is the difference between WHERE and  HAVING clause in SQL is one of the most popular questions asked on SQL and database interviews, especially to beginners? Since programming jobs, required more than one skill, it’s quite common to see a couple of SQL Interview questions in Java and .NET interviews. By the way unlike any other question, not many Java programmers or dot net developers, who are supposed to have knowledge of basic SQL, fail to answer this question. Though almost half of the programmer says that WHERE is used in any SELECT query, while HAVING clause is only used in SELECT queries, which contains aggregate function or group by clause, which is correct.

Top 5 Courses to Learn IntelliJIDEA and Android Studio IDE for Java and Kotlin Programmers in 2023 [Best & FREE]

There is no doubt that IntelliJ IDEA is THE best IDE for Java development, even though Eclipse may still be probably used by more people because it's FREE, IntelliJ IDEA is the most feature-rich and complete IDE. The Android Studio, which is the official IDE for Android development in Java, is also based upon IntelliJ IDEA, which further cement its place as the IDE Java developer should learn. The only thing which stops many other Java developers and me from moving from IntelliJ IDEA in the past was the lack of resources. Since Eclipse was free from the start, there are tons of resources, like books, courses, and tutorials are available. There are also a lot of resources to learn productivity tips, like keyboard shortcuts, and debugging techniques, but there were not many for IntelliJIDEA.

Top 5 Blockchain Certification Courses for Beginners on Coursera to Learn in 2023 - Best of Lot

Hello guys, if you are not living under a rock then you know that Blockchain is quickly becoming one of the leading technology, and the demand for skilled Blockchain developers and architects are increasing every passing day. There is no surprise that Blockchain has the biggest impact on the Finance domain and almost every big investment bank has its own research division on Blockchain they are also hiring Blockchain experts to build a competitive advantage over their rivals. This means, 2023 is probably the best time to learn Blockchain and become a Blockchain developer or architect. If you already made up your mind and one of your 2023 goals is to learn Blockchain Technology and become a Blockchain developer or architect and looking for the best online courses then you have come to the right place. 

Top 5 Machine Learning Books for Beginner in 2023 - Best of Lot

Hello guys, if you want to learn Machine learning in 2023 and looking for best resources like Machine learning best books, or machine learning best courses then you have come to the right place. Earlier, I have shared machine learning best courses and best python books for Machine learning and in this article, I am going to share best books to learn Machine Learning for Beginners in 2023. Machine learning and artificial intelligence are booming fields in today's world. This industry has made humanity life’s easier by automating tasks or improving things that we always need such as translation, fraud detection in money transactions, stock prediction before you make an investment and so much stuff that you couldn’t imaging.

Top 5 Spring MVC Online Courses for Beginners in 2023 - Best of Lot

Hello guy, Many of you have been asking me about the best online courses to learn Reactive Spring, Spring Boot, and Spring MVC. I have shared the best Spring Boot courses in the past, and today I will share the best courses to learn Spring MVC. Many Java developers think that Spring MVC is the same as Spring Framework, which confuses them. In this article, I'll try to answer than questions and share some of the best courses to learn Spring MVC for Java developers. Both Spring Core and Spring MVC are part of the same umbrella, a more significant spring framework project, but they are not the same.

Top 5 Online Courses for Content Creators and Instructors in 2023 - Best of Lot

There is something about content creation like online training courses that makes learning so easy. They are affordable, convenient, and accessible everywhere. More and more programmers, bloggers, and experts are now teaching online so that now there are so many high-quality courses available on the internet to learn almost anything. It wasn't like that a couple of years ago when books and tutorials were the primary resources for learning new skills, but there is a huge potential still for both learners and creators when it comes to creating and selling online courses. You can easily make 10K USD per month by selling online courses and more importantly can make a difference in people's life.

Why Programmers & Software Engineers Should Create Online Courses in 2023? [Side Project]

I often receive queries like should programmers create an alternative source of income, or should programmers create their own blog or website? Both are fundamental questions, and there was a time when I advise programmers to create their own blog, not just to learn and improve their understanding of the technology they know, but also to earn money while doing things they love, but time has changed. Now I advise Programmers and Software Developers to create and sell online courses on Teachable, Thinkific, Podia, Udemy, or any other platforms. The reasons are still the same, you learn and earn, but the method has been changed. A blog is always an excellent way to establish yourself online, but it requires a lot more effort and time to earn something meaningful.

Top 5 Free Data Structure and Algorithm Courses for Java and C Programmers

Data Structure and Algorithm is one of the essential topics for programmers, both to get a job and do well on Job. Good knowledge of data structure and algorithm is the foundation of writing good code. If you are familiar with essential data structures like an array, string, linked list, tree, map, and advanced data structure like Tries, AVL trees, etc and know when to use which data structure and compute the CPU and memory cost of your code in terms  Even though you don't need to write your own array, linked list or hashtable, given every major programming SKD provides them like JDK or C++ STL library, you will need to understand them so that you can use them in right place. Using the right data structure can drastically improve the performance of an algorithm.

What is CyclicBarrier in Java? How and When to use CyclicBarrier with Example? Tutorial

What is CyclicBarrier in Java

CyclicBarrier in Java is a synchronizer introduced in JDK 5 on java.util.Concurrent package along with other concurrent utility like Counting Semaphore, BlockingQueue, ConcurrentHashMap, etc. CyclicBarrier is similar to CountDownLatch which we have seen in the last article  What is CountDownLatch in Java and allows multiple threads to wait for each other (barrier) before proceeding. The difference between CountDownLatch and CyclicBarrier is also a very popular multi-threading interview question in Java. CyclicBarrier is a natural requirement for a concurrent program because it can be used to perform the final part of the task once individual tasks are completed.

Top 5 Courses to Learn Software Architecture for Experienced Programmers in 2023 - Best of Lot

Every Programmer wants to grow in their career, but it's not easy, and if you don't pay attention to your job, you will likely stay in the same position for many years. The growth in the initial few years is generally fast. Still, once you reach the barrier of 5 years, you need to decide which direction you want to move like - people management, product management, or software architecture. For tech guys, who don't want to go on people and product management, software architecture or solution architecture is the final position, which is not surprising. If you want to be close with coding and technical discussions, like to try new technologies, and want to use them in your organization to solve a challenging problem, software architect and solution architect is an excellent position to be in.

Top 5 Software Platforms to Create and Sell Online Courses in 2023 - Best of Lot

Hello guys, if you are an online course creator, instructor, or blogger looking for best software and online platform to create, and sell your online courses then you have come to the right place. In the past, I have how shown you how to create online course for FREE and In this article, I am going to share the best software to create and sell your online training courses. You will learn about the best online teaching Software and platforms like Teachable, Thinkific, Udemy, and Podia and analyze them to find out which is best software for creating and selling online courses. Online Course business is becoming bigger and bigger with so many bloggers, professionals, programmers are creating online courses and making good money. It's a new avenue for passive income creators and I think it's one of the best I know. Why? because it's a win-win for everybody.

How to Create Online Course for FREE? Best Tools, Software and Platforms

Hello guys, I have been telling my readers and fellow programmers to create an online course in 2022, and many of them have already started planning their courses. Though, one question which keeps coming to me is how you can create an online course for free? This is an obvious question, and after answering many of my readers over Facebook chats and emails, I decided to write a blog post about it so that everyone else who wants to create an online course for free can create and sell online courses for free without any investment except time and passion can benefit. But, before answering this question, let me first congratulate you on making an excellent decision to create an online course, the best win-win situation where everybody involved in this process wins.

Top 6 Courses to Learn Spring Framework in Depth in 2023 - Best of Lot

Spring Framework is an essential skill for Java developers, not only to get a job as a Java developer but also for your career advancement. Since Spring is now used in almost every Java project, it becomes virtually mandatory to learn the Spring framework. Now, the question comes, what is the best way to learn the Spring framework? Are there any online courses out there that are focused on Spring? What are some good books and resources for learning Spring? These questions are widespread among Java developers, and I often see them on forums, online chat channels, and even many of my readers also ask this to me on Facebook chats and email. Well, the best way to learn any technology is by coaching, online courses, and books.

Is "Java Concurrency in Practice" Still Valid in the Era of Java 17?

Hello guys, one of my reader Shobhit asked this question on my blog post about 12 must-reads advanced Java books for intermediate programmers - part1. I really like the question and thought that many Java programmers might have the same doubt whenever someone recommends them to read Java Concurrency in Practice. When this book came first in 2006, Java world was still not sure of about new concurrency changes made in Java 1.5, I think the first big attempt to improve Java's built-in support for multi-threading and concurrency. Many Java programmers were even not aware of new tools introduced in the API like CountDownLatch, CyclicBarrier, ConcurrentHashMap, and much more. The book offered them the seamless introduction of those tools and how they can use them to write high-performance concurrent Java applications.

Coursera Review - Is Meta Social Media Marketing Professional Certificate worth it?

Hello guys, if you want to learn about social media marketing and looking for best online courses and training program then you have come to the right place. Earlier, I have shared best Twitter Marketing courses, best Instagram Marketing Courses, and best Facebook Marketing course and today, I will review one of the most popular Social Media marketing training program on Coursera, Facebook or Meta's Social Media Marketing Professional Certificate.  If you have a business and you are worried about getting an audience or loyal customers or maybe even brand awareness for your brand, then social media marketing is one of the best solutions for you. 

Top 5 Free Java Courses for Beginners to Learn Online in 2023 - Best of Lot

We all love free resources, don't we? If you want to learn Java online in 2023 and looking for the best free core Java online courses then you have come to the right place. Earlier, I have shared the best Java courses for beginners and in this article, I am going to share the best free courses to learn Java online. There was a time when I buy a lot of books when I was preparing for my engineering entrance exam but I only ended up buying books not reading them. After that, I changed my habit to first try to read a book on loan or try free resources and only buy when I really need them. When I started my programming journey, mostly I learn from free resources like free courses and books and there I developed the passion to collect free resources as well. 

How to use Exchanger for Sharing Objects between Threads in Java? Example Tutorial

Hello guys, if you are working in a concurrent Java application then you might have heard about the Exchanger class of java.util.concurrent package. The Exchanger in Java is another concurrency or synchronization utility introduced in Java 1.5 along with CountDownLatch, CyclicBarrier, and Semaphores. As the name suggests, the Exchanger allows two Threads to meet and exchange data at the rendezvous or meeting point. This means you can use Exchanger to share objects between threads and for inter-thread communication. The java.util.Exchanger is a parametric class, which defines and holds the type of object to be exchanged. It has an overloaded method called the exchange(), which is used to exchange objects between threads.

Top 5 Java Design Pattern Courses for Experienced Java Developers in 2023 - Best of Lot

Hello guys, today, we'll talk about design patterns and some of the best online courses to learn design patterns in Java from scratch. If you are wondering what is a design pattern and why Java developers should learn them? then let me give you a brief overview. Design patterns are nothing but a tried and tested solutions of common programming problems, for example, the creational design patterns deal with the problems of object creation. They exist from a long time but made popular by famous Gang of four of Erich Gamma, John Vlissides, Ralph Johnson and Richard Helm in their classic 1994 book Design Patterns: Elements of Reusable Object-Oriented Software, also known as GOF design patterns. This book documented 24 design patterns which are reusable to solve common programming problems. 

Coursera Review - Is Google Data Analytics Professional Certificate Worth it?

Hello guys, if you want to become a Data Analyst in 2022 and looking for best online courses, guides, and tutorials to learn Data Analysis then you have come to the right place. In the past, I have shared best Data Analysis courses, Books, and 2022 Data Analyst RoadMap, and in this article, I will share one of the most popular Coursera course to learn Data Analytic, Google Data Analytics Professional Certificate. With more than 800,000 enrollments on Coursera this is one of the most popular Data Analytics course on Coursera and why not? Its created from Google itself. It's also well structured, up-to-date and you will learn all essential Data Analytics skills from Google experts. 

Top 5 Free Online Courses to learn Linux and Ubuntu in 2023 - Best of Lot

Hello guys, if you want to learn Linux and Ubuntu Operating system in 2023 and looking for the best resources like books, online courses, and tutorials then you have come to the right place. Earlier, I have shared the best Kali Linux courses, websites, and books and in this article, I am going to share free online courses to learn both Ubuntu and Linux online. Ubuntu is without a doubt one of the most widely used operating systems for server-side applications. Except for a number of Java apps that run on Windows as a service, I've seen practically all Java applications run on Linux. 

Coursera Review - Is Django For Everybody Specialization Worth it?

Hello guys, if you are looking for best Coursera course to learn Django or just wondering whether to join Django for Everybody specialization on Coursera or not, you have come to the right place. In the past, I have shared best Django Courses and best Python web Development Courses and in this article, I will review Coursera's popular Django course, Django for Everybody specialization by University of Michigan USA. This course is created by none other than Charles Russell Severance, instructor of Coursera's most popular Python for Everybody specialization which is trusted by millions of learners worldwide.

[Solved] How to Remove a Character From String in Java ? Recursion Example

Hello guys, if you are wondering how to remove a given character from a String in Java then you have come to the right place. In the past, we have solved many common String coding problems like String anagram check, String Palindrome check, and String permutation and in this article, you will learn how to remove a given character from a String in Java. Basically, you need to write a program to remove a given character from String in Java. Your program must remove all occurrences of a given character. For example, if given String is "aaaaa" and String to remove is "a" then the output should be an empty String. Similarly, if input String is "abc" and character to remove is "b" then your program must return "ac" as output. 

Udemy vs CodeCademy vs OneMonth? Which is the best place to learn coding with Python in 2023?

Online learning, particularly online courses, has completely changed the way people learn things as whoever I speak from beginner to professionals; everyone seems to prefer learning online. The current global situation has also accelerated the need for online learning. This is a nice change, but, with so many choices available, there is also a lot of confusion which often pops up when I discuss with my readers. One question which has been kept coming in the past is which platform to choose for learning online? CodeCademy, Udemy, or OneMonth? This is the most common question among all beginners mind who have just started to learn coding and programming online.

Why Java Programmers Should Learn Docker and Kubernetes in 2023

Hello Java Programmers, if you are looking to learn some in-demand software tools to improve your profile, then you have come to the right place. Earlier, I have shared the best tools for Java developers, and today, I am extending it to all developers. long with Docker, if there is another tool or technology which has caught software developers' attention in recent times then it must be Kubernetes.  Actually, it's often mentioned alongside Docker because it takes what Docker offers to the next level.  If you don't know what is Docker and Kubernetes let me give you a brief overview before going deep into why every programmer should learn Kubernetes. In simple words, Docker is a container and Kubernetes is a container orchestration tool, something which can do creating, destroying, and managing containers at scale.

Coursera - DeepLearning.AI TensorFlow Developer Professional Certificate Review

 Hello guys, if you are learning TensorFlow for AI and Machine Learning and looking for best resources to learn TensorFlow in depth then you have come to the right place. Earlier, I have shared best TensorFlow courses for beginners and in this article, I am going to review, one of the top TensorFlow Course from Coursera, DeepLearning.AI TensorFlow Developer Professional Certificate. This is one of the popular and well structure Coursera course to learn TensorFlow and earn a certificate and we will review this to find out whether its really worth it or not.

Top 5 Courses to learn Operating System (Linux, Windows, Mac) in 2023 - Best of Lot

Hello guys, if you are a computer science beginner or a self-taught developer looking to learn Operating System fundamentals, then you have come to the right place. I have been sharing Computer fundamental courses in the past like these data structure and algorithms courses and these computer science courses. In this article, I will share the best online courses to learn Operating Systems for Beginners. The operating system is the most important piece in any laptop, phone, or IoT device. Without this piece, your device is only a junk box; no more than that except some hardware that does nothing on a motherboard. 

Review - Is Web Applications for Everybody Specialization on Coursera Worth it?

Hello guys, if you are looking for an amazing course to start your web application development career or you are looking for great web development course on Coursera, or you are thinking whether Web Applications for Everybody Specialization is worth it or not then you have come to the right course. In the past, I have shared best web development courses form Coursera and in this article, we will review this course. Every company needs a website to run their business and connect with customers and companies. Nowadays, technical people can do that and program the website with complex functionalities, but people from non-technical backgrounds can use some services to make a shopping website. What if your website has some complex functionalities to perform other than just a simple web page.

Top 5 NoSQL Databases Programmers Should Learn in 2023 [UPDATED]

Though it's not mandatory for Java or Web developers to learn the NoSQL database, the world is moving in that direction, and both Java and Web developer should be familiar with NoSQL databases. If you are wondering what a NoSQL database is means, then here is a quick overview. A NoSQL database refers to non SQL, non-relational, or not only SQL) that provides a mechanism for storage and retrieval of data, which is modeled in means other than the tabular relations used in relational databases. With Spring 5 introducing Web-Flux, a new non-blocking web framework, the use of a NoSQL database will only grow, but the big question is which NoSQL database to start with?

10 Reasons to Learn Scala Programming Language in 2023 [UPDATED]

One of the questions my reader often ask me is, should Java developers learn Scala? Does Scala has a better future than Java, or why Java developer should learn Scala, and so on. Well, there can be many reasons for learning Scala, like you are forced to learn because it has been used in the new company you joined or your solution architect decided to use it, but that's a different story. Here, we'll talk about the reasons which encourage Java developers to learn Scala.  Scala has emerged as one of the most powerful Java alternatives in recent times. It's been the JVM language of choice, leaving Groovy and Clojure way behind, and preferred as the language people want to write most code in.

Top 5 Free Agile Courses for Programmers and Software Engineers in 2023 - Best of Lot

Technology is changing at a rapid pace and market conditions, tough competition, and time-to-market are some of the biggest concerns for today's organizations, especially for technology companies. In order to adapt to this fast-changing environment, most companies are now using the Agile model of development, testing, and project management. This enables the organizations to efficiently cope with changes and deliver faster and that's why for a programmer or an IT professional, a solid knowledge of Agile methodologies and framework is important. It doesn't matter whether you know the Waterfall model of development or not but it does matter whether you have worked in an Agile environment or not. In order to educate programmers about Agile, I have shared some of the books to learn Agile in past and today I am going to share some of the free online Agile courses you can take to learn Agile methodologies at your own pace.

Top 5 Free C programming Courses for Beginners to Learn Online in 2023 - Best of Lot

Hello guys, if you are learning C programming and looking for the best resources like online courses and books then you have come to the right place. In the last article, I have shared the best courses to learn C programming and in this article, I am going to share the best free C programming courses for beginners. C is one of the first programming language I learned and it's also one of the first major programming languages is taught in Academics but it's also one of the popular programming languages of the software industry. The majority of JVMs and compilers are written in C. C has influenced the development of several other programming languages.

[Solved] How to Print Pyramid Pattern of Characters in Java? Example Tutorial

In earlier programming tutorials, I have taught you how to print a pyramid pattern of stars and numbers in Java, and in this tutorial, you will learn the printing pyramid patterns of alphabets. If you understand the logic of previous programs then this one won't be difficult for you because we will use the same logic of printing rows and columns using the nested loop in Java. Actually, a pyramid pattern is nothing but a matrix where you need to print rows and columns. Though, you need to learn where to print those values and when to move to the next row.

How to calculate large factorial using BigInteger in Java? Example Tutorial

Factorial of numbers greater than or equal to 13 cannot be found using primitive int data type as shown in our earlier factorial solution due to overflow. These factorials are too large to fit in an int variable, whose maximum value is just 2147483647 (2^31 -1). Even if we use the long data type, factorials greater than or equal to 21 will generate an overflow. To find the factorial of anything above 21, you need to use the BigInteger class from java.math package.