When someone starts learning how to program, whether alone or through online courses, it's very important to emphasize some domain and structure everything. In this article, we present our structure — Java tasks for beginners, with an indication how much any particular type of task is represented...

Want to know something more and more in our life. So Study and study..

Asking for tips on moving to another company. I have a 5 year experience in an IT company. 2 years in QA (manual and automation), 3 years in Innovation (1 year as a VBA programmer, another 2 years of mixed python and java scripting). Innovation team is an Agile team...

We're accustomed to being able to quickly access and absorb information. We prefer five-minute videos to lengthy lectures and short articles to books. I won't say that a good programming book replaces every article — that's not the case. And it certainly doesn't replace practice. However, for me personally...

everyone likes programming

System.out.println("#love programming");

Greetings, friends! You’ve waited for this event for so long. You asked us “When it happens??” again and again. The answer is: today is the day X and we are happy to present you a new… no, two brand new Quests of CodeGym at once! That means you will get 323 new fascinating lectures and 565 coding tasks...

I have been learning JAVA for almost two years before I got regestered into the CODEGYM site, therefore I think that i have enough skills to apply for a junior developer job. In fact I know about java basics, OOP (Abstraction, encapsulation, inheritance, and polymorphism...)...

When will CodeGym unlock multithreading and collections quests? This is the greatest learning site for java programmers, but it's no longer going to be that great if we wait for a long time to get a new quest in this fast changing world of technology.

Hi! Today we'll continue to get to know serialization and deserialization of Java objects. In the last lesson, we got to know the Serializable marker interface, reviewed examples of its use, and also learned how you can use the transient keyword to control the serialization process...

Hi! In today's lesson, we'll talk about serialization and deserialization in Java. We'll start with a simple example. Imagine that you're a computer game developer. If you grew up in the 90s and remember the game consoles of that era, you probably know that they lacked something we take for granted today...

Hi! We continue our study of multithreading. Today we'll get to know the volatile keyword and the yield() method. Let's dive in :) When creating multithreaded applications, we can run into two serious problems. First, when a multithreaded application is running, different threads can cache ...

Hi! Today we'll continue to consider the features of multithreaded programming and talk about thread synchronization. What is 'synchronization'? Outside of the programming domain, it implies an arrangement that allows two devices or programs to work together. For example, a smartphone and computer...

Hi! Today we'll continue to talk about multithreading. Let's examine the Thread class and what a few of its methods do. When we studied class methods previously, we usually just wrote this: -> . This won't work with Thread's methods :) ...

Hi! First of all, congratulations: you've reached the topic of 'Multithreading'! This is a serious achievement — you've come a long way. But prepare yourself: this is one of the most difficult topics in the course. And it's not that we're using complex classes or lots of methods here...

Hi! In today's lesson, we'll get acquainted with the concept of access modifiers and consider examples of how to work with them. Of course, saying 'get acquainted' isn't quite right: you are already familiar with most of them from previous lessons. Just in case, let's refresh our memory of the most important...

Hi! In a past lesson, we discussed casting primitive types. Let's briefly recall what was discussed. We imagined primitive types (in this case, numeric types) as nesting dolls that vary in size according to the amount of memory they occupy...

While CodeGym is busy creating the next big content release, what would you suggest as a next step? My goal is to learn enough Java that I can start working as a Jr. Developer. I've been at this for almost a year now, going through online "Learn Java" programs, reading through several of the top recommended books...

Hi! Today we'll talk about the instanceof operator, consider examples of how it is used, and touch on some aspects of how it works:) You've already encountered this operator on early levels of CodeGym. Do you remember why we need it? If not, no worries. Let's remember together...

Hi! In this lesson, we'll talk about how abstract classes differ from interfaces and consider some examples with common abstract classes. We've devoted a separate lesson to the differences between an abstract class and an interface, because this topic is very important...