How to use Linked List in Java? Example Tutorial

Hello friends, we meet again on our journey to Java. I hope you guys are enjoying Java and are trying hands-on too. Today we are gonna discuss a very easy topic (yeah, I mean it :p). But, do not get carried away just by "easy", this is the hottest topic asked in various interviews, exams, and development purposes too. So, what's the wait? Let's start!

As usual, let's start with a scenario. Let's say you want a data structure that stores data in a sequential manner, like an array. But, you don't know the size yet while initializing the data structure. Arrays don't support that, they need a size beforehand. So, what should we do? Do not worry, as Java is here to help us again. Let's explore it then!

Top 5 Free Core Spring, Spring MVC, and Spring Boot Courses for Beginners in 2021 - Best of Lot

I have been sharing a lot of resources like books and courses recently and when I published my list of Top 5 courses to learn Spring and Hibernate, many of my readers asked about a similar list of free courses to learn Spring Framework like Core Spring, Spring MVC, Spring Security, and Spring Boot. That request was always back in my mind but I couldn't get time to put together a list, which I can share with you guys, but today is the day. In this list, I have compiled some of the best online free courses to learn Spring Framework from scratch, online at your own pace. 

Top 5 Online Courses to Learn Linux in Depth - Best of Lot

Hello guys, if you want to learn Linux operating systems and command lines and look for the best Linux courses, you have chosen the right place. In the past, I have shared some free Linux courses and bash scripting courses for programmers and developers, and many of you asked for more comprehensive online Linux courses to learn Linux in-depth, which motivates me to write this article. In this article, you will find the best Linux online training classes, online paths, and tutorials from Udemy, Pluralsight, Coursera, and edX, my favorite online learning platforms.  

Top 5 Computer Vision and OpenCV Courses to Learn in 2021 - Best of Lot

Hello guys, if you want to learn Computer Vision and OpenCV and looking for the best computer vision online courses from Udemy, Coursera, and Pluralsight then you have come to the right place. Earlier, I have shared the best online courses to learn Python, Data Science, and Machine Learning from Coursera and Udemy, and in this article, I am going to share the best online training courses to learn both Computer Vision and OpenCV. The list includes courses for both beginners and experienced programmer who wants to learn the advanced concept of Computer Vision and Open CV.  It's one of the most existing fields of Machine Learning and Artificial Intelligence and has uses across industries like object detection, self-driving cars, robotics, and much more.

How to use Strategy Design Pattern in Java? Example Tutorial

Hello guys, you might have heard about it, Can you tell me any design pattern which you have used recently in your project, except Singleton? This is one of the popular questions from various Java interviews in recent years. I think this actually motivated many Java programmers to explore more design patterns and actually look at the original 23 patterns introduced by GOF. The Strategy design pattern is one of the useful patterns you can mention while answering such a question. It's very popular, and there are lots of real-world scenarios where the Strategy pattern is very handy. 

Difference between Abstraction and Encapsulation in Java and Object Oriented Programming? [Answer]

The difference between Abstraction and Encapsulation in Java is a common question in Java interviews for Beginners to check their understanding of Object-Oriented Programming and their ability to use them. Abstraction and Encapsulation in Java are two important Object-oriented programming concepts and they are completely different from each other. The only similarity between Abstraction and Encapsulation is that they are OOP concepts, other than that they mean two different things, but there is a confusing thing, both hide details to simplify things but for different reasons. 

How to use TreeMap in Java? Example Tutorial

Hello friends, I hope you all are doing well and having lots of fun reading and learning together. Today we are here a meet again on our journey of Java. I hope you all have seatbelts buckled up as today it's gonna be an adventurous ride while learning something that is most used in many production applications, coding, and whatnot. Today's topic, TreeMap in Java is very important because it holds a very significant feature Java development kit provides. 

Top 5 Courses to learn Web Scraping using Python and JavaScript in 2021 - Best of Lot

Hello guys, if you want to learn Web Scraping and are looking for the best online courses to learn Web Scraping using Python and other programming languages, you have come to the right place. Earlier, I shared the best web scraping tools and best scrappy courses. In this article, I will share the best online training courses to learn Web Scraping using NodeJS, JavaScript, Python, and BeautifulSoup. These are the best courses from sites like Udemy and Pluralsight, the best places to learn online. So what is Web Scraping? Web scraping, also known as web harvesting, is a technique used to extract large amounts of data from websites. How does this happen?

7 Difference between extends Thread vs implements Runnable in Java [Answer]

Hello guys, the difference between Thread vs Runnable in Java is a common Java multithreading interview question that is often asked by junior Java developers with 2 to 4 years of experience. If you are doing Java programming then you may know that Java provides multithreading to parallelize the execution of tasks (code) and you need multiple threads to run multiple things in parallel like downloading a file in the background and showing the progress bar at the front-end. There are two ways to create a Thread in Java, first by extending java.lang.Thread class and second by implementing the java.lang.Runnable interface. 

Java CountDownLatch Example for Beginners - [Multithreading Tutorial]

Hello Java programmers, the CountDownLatch is an important concurrency utility class that was added in JDK 1.5 to facilitate inter-thread communication without using wait and notify methods, but unfortunately, many Java developers still struggle to understand and use this powerful tool. In this article, you will learn what is CountDownLatch and how to use it to write better concurrent applications in Java. You can use the CountDownLatch if you are spawning multiple threads to do different jobs and want to know when exactly all tasks are finished so that you can move to the next stage. In other words, you can block a thread until other threads complete their task. 

Top 5 Free & Paid Spring Certification Courses and Practice Tests

Many Java developers don't know that, similar to Oracle's Java certification, there is also a Spring certification program, which certifies yourself for your Spring framework skill. There are three Spring certifications currently available, the Spring Professional certification exam, also known as the Vmware Certified Spring Professional exam (VMware EDU-1202) which certifies on your general knowledge about Spring framework, Spring MVC skill, Spring Boot, Spring Data JPA, Testing with Spring and Spring Boot, and other advanced Spring skills. Earlier, SpringSource provides these certifications, but now they are provided by Vmware, the company behind the Spring framework.

Top 5 Online Courses to Learn HTML and CSS in Depth - Best of Lot [UPDATED 2021]

Hello guys, if you want to learn HTML and CSS to become a web designer and developer and are looking for the best HTML and CSS courses, you have come to the right place. In the past, I have shared the best free courses to learn HTML and CSS, and in this article, you have a selection of the best courses you can have to learn a lot about HTML5 and CSS3 online.  This article will share the best HTML5 and CSS 3 online courses from sites like Udemy, Coursera, Pluralsight, and edX for beginners and experienced developers. These online training courses and classes are created by experts and trusted by thousands of developers to learn HTML5 and CSS3 online in 2021

Difference between View and Materialized View in Database or SQL? [Answer]

The difference between View and Materialized view is one of the popular SQL interview questions, much like truncate vs delete, correlated vs noncorrelated subquery, or primary key vs unique key. This is one of the classic questions which keeps appearing in SQL interviews now and then and you simply can’t afford to learn about them. Doesn’t matter if you are a programmer, developer, or DBA, these SQL questions are common to all. Views are a concept which not every programmer is familiar with, it is simply not in the category of CRUD operation or database transactions or SELECT query, its little advanced concept for the average programmer.

Top 10 Courses to learn JavaScript in Depth in 2021 - Best of Lot

Hello guys, JavaScript is one of the most powerful programming languages and if you want to learn JavaScript then now is the best time. If you are looking for the best and advanced JavaScript courses then you have come to the right place. Earlier, I have shared free JavaScript courses and in this article, I am going to share some of the best courses to learn JavaScript in 2021. I have compiled this list by collecting a lot of recommended JavaScript courses from online learning platforms like Udemy, Coursera, Pluralsight, Educative, CodeCademy, edX, Udacity, and others. This is a decent collection of different types of JavaScript courses from different platforms. While you don't need to join all these courses, joining one or two will be enough. 

How to find symbolic link or soft link in Linux? ls + find command Example Tutorial

There are two ways you can find a symbolic link or soft link in UNIX based operating systems like Linux, Solaris, BSD, or IBM AIX. The first way is by using the ls command in UNIX which displays files, directories, and links in any directory and the other way is by using UNIX find command which has the ability to search any kind of file e.g. file, directory, or link. In this UNIX command tutorial, we will see examples of both of these UNIX commands for finding a soft link in any directory. If you are new to UNIX operating system and not familiar with the concept of the soft link and hard link, I would recommend getting a good hand on it, as it is one of the most powerful features of UNIX based system.

Top 10 Data Science and Machine Learning Courses, Certifications in 2021 - Best of Lot

Suppose you work in the technology field today as a programmer or software engineer. In that case, I am sure you have heard about terms like Data Science, Machine Learning, Deep Learning, Artificial Intelligence, etc. They are the latest technologies impacting every single sector, just like IT does it when it comes the first time. It doesn't matter if you work for a bank or insurance sector, airspace, or defense. All fields were impacted by IT, and shortly, they will be affected by machine learning and artificial intelligence. That's why it's essential to learn Data Science and Machine learning in 2021, and if you are looking for some good resources like courses and certification, you have come to the right place.

Top 5 Project Based Courses to learn Laravel and PHP for Web Development in 2021 - Best of Lot

Hello guys, if you want to learn Laravel, one of the most popular PHP frameworks for web development, and looking for the best resources like online courses, tutorials, and classes, then you have come to the right place. Earlier, I shared the best PHP courses for beginners, and in this article, I will share the best online courses to learn Laravel for development with PHP. Many believe that PHP has lost its prominence since the emergence of Node.js. But still, It remains one of the most popular languages in the server-side development community. 

Is Java a good Programming Language to learn to code in 2021?

I often receive questions like which is the first programming language to learn first, Is Java the right programming language to start in 2020,  how good Java is as a first programming language, which is the best programming language for beginners, or shall I start with Java or Python. Well, the answer to all these questions is, Java is one of the most popular programming languages, and there are a lot of reasons to learn Java, starting with Job opportunities to leverage community support. In the context of beginning programming or choosing Java as the first language, my most significant reason is that it's simpler to learn. 

6 Best Golang Programming Courses for Beginners to Learn in 2021 [UPDATED] - Best of Lot

Hello guys, if you want to learn the Go programming language in 2021 and look for the best Golang online courses, you have come to the right place. Earlier, I shared the best JavaScript Courses, and today, I will share the best online courses to learn one of the modern programming languages called Go or Golang. This popular, next-generation, highly efficient programming language is created by none other than Google, creator of Angular, Android, Flutter, and Dart, to make their software development process smoother and better. 

How to use WeakHashMap in Java? Example Tutorial

Hello friends, we are here today again on our journey to Java. I hope everyone is fine and ready to board our train of knowledge. Today we are gonna learn something very interesting and very exciting. Today's topic will definitely be very useful in coding and programming. This topic would surely decrease your time complexity, and space requirements for any task very significantly :p So what's the wait? Let's start!

As always, we will start understanding today's topic by a scenario. But, before that, you guys must know what a HashMap is. So, go through the HashMap article before jumping on this one, and you will get a better understanding of today's article. For the guys who have already gone through HashMap before, let me give a brief intro and what a HashMap is so we all can refresh the topic easily.