Articles

Mamy dobrą wiadomość dla naszych uczniów Javy z Polski! Jest jeszcze siedem kolejnych poziomów kursu CodeGym dostępnych w twoim ojczystym języku, więc pospiesz się i ukończ poziomy 2-8. Jak wiesz, niedawno przetłumaczyliśmy na 8 języków dwa poziomy demonstracyjne CodeGym. Następnie czekaliśmy na...

After reading about what had to be done, I decided to make a plan for how I should study in order to achieve my goal and finish the courses, because I didn't have time for studying at a leisurely pace. My objective was to learn quickly...

A set is simply a collection of unique objects. Unique means that no two objects can have the same value(s). Depending on the implementation of the set, it may or may not be ordered. The Java set, as an Abstract Data Type (ADT), has a few key operations (where T represents any data type e.g. int, String, or any class...

Imagine that you go to the library, and you want to find a particular book. How do you do it? If it’s non-fiction, there’s the Dewey Decimal System. If it’s fiction, they’re sorted in alphabetical order by their last name. Whatever you’re looking for, at some point, you have to go through the books one at a time until you...

Hello, everyone! I don't have to tell you how difficult it is now to get a job as a programmer when you don't have experience. Competition at the "no experience" level has grown significantly lately (primarily due to websites such as CodeGym, and other online courses)...

As you learn how to programming, you spend a lot of time writing code. Most beginning developers believe that this is what they will do in the future. This is partly true, but a programmer's job also includes maintaining and refactoring code. Today we're going to talk about refactoring...

If you are interested in technology, you have probably heard about Web Summit - the largest IT conference in Europe, which annually brings together tens of thousands of IT people, startups, investors and everyone who is interested in innovations and trends in the modern tech world...

If you are looking for Java exercises for beginners, I have good news for you: it is a proper step to become a real programmer. Because programming is all about coding, and there is no way to avoid this. However, this news is a good one! Because it is really exciting to learn something practical...

Abstract methods are a powerful tool of Java and give this object-oriented language even more capabilities when it comes to polymorphism. A Java abstract method can be used to create a basic framework for an entire program and enable you to adjust as needed. An abstract method is a method that has no...

Before we get into learning JUnit in Java, let’s briefly overview what unit testing is and why it’s so popular (if you know this stuff already, skip to ‘How do I write a JUnit Test in Java?’). Unit testing in Java makes large-scale software development much more efficient and effortless. It can help both individuals...

A programming language is very similar to a spoken language. The only difference is that it is a special language whose main purpose is to facilitate communication with a computer in order to explain to the computer what we want it to do. But you can't have a personal conversation with a computer...

he Stack in Java is a data structure, much like a queue, array, linked list, or tree. Where it differs from the others is that the Java Stack is based on the Last In, First Out (LIFO) principle. What this means is that when you use the two commands to add and remove an element from the stack...