Articles

One of the core advantages of CodeGym, compared to other online Java courses or alternative ways to learn this programming language, is that our platform is designed to take total beginners in coding and turn them into real...

One of the core pieces of advice we are normally giving to CodeGym students and other beginners in coding who want to progress and get their first Junior Developer job, is to work on...

“Learning never exhausts the mind,” said Leonardo da Vinci. We are not trying to argue with one of the greatest geniuses of all times, but learning all the time can be tiring, even if you are...

Let’s face it, trying to master anything new on your own can be a wearing journey. After all, we humans are social creatures. And if your goal is to learn programming from scratch (not the easiest skill) the road can be long and full of terror, figuratively speaking...

As we know, the Java language is an object-oriented programming language. In other words, the fundamental concept, i.e. the foundation of the foundation, is that everything is an object. Objects are described using classes. Classes, in turn, define state and behavior. For example, a bank account...

Today we're going to talk about factorials and the most common ways to find factorial. This is one of the most basic functions that a programmer needs to both know and be able to work with. Well, let's get started. The factorial of the number n, denoted as n!, is the value of the product...

Taking character input in Java isn’t as simple as taking input as a string or integer. The Scanner class in Java works with nextInt(), nextLong(), nextDouble(), etc. However, it does not support nextChar in Java, which makes taking character input slightly more complicated. If you’re looking...

Generally predicate means a statement that determines whether a value could be true or false. In programming predicates mean functions with one argument that return a boolean value. Functional Interface Predicate was realised in Java 8. “Functional” means...

Hello, everyone! I've been meaning to write my story for a year now. I never found the time. But the thought would never leave me, and then one fine evening the opportunity came. I'll give you a little background. I graduated from the university with a degree...

Oh, Java arrays. They are the object of intense love and hatred of hundreds of beginner software developers. Adding elements to an array that was already initialised is impossible, they said… Actually, it is possible, but not in a classical meaning...

The Collections Framework is a very popular component in Java API. List interface and ArrayList class are probably the most important tools in the Collections Framework. subList is a method in the List interface that lets you create...

What is a HashSet? HashSet is a built-in datatype in Java, and in layman terms you can say “HashSet is an unordered collection of unique elements.” Have a look at a basic example. HashSet extends (extends means a class is inherited from another class) AbstractSet and...