Articles

Hi! In previous lessons, we did a deep dive into arrays and reviewed common examples of working with arrays. In general, arrays are super handy. And. as you've already noticed, you can do a lot with them :) But arrays do have a number of shortcomings ...

Hello again! :) In the last lesson, we got to know such a data structure called an array. We learned how to create them and fill them with data. And we looked at how they're stored in memory. Today we'll look at some tasks and examples of working with arrays that you will often see in real work ...

Hi! Previously in your training, we've worked with single objects (and primitive types). But what if we need to work with a whole group of objects instead of just one? For example, say we want to create a list of birthdays of all employees at our company. We'll benefit from a special data structure called an array ...

Hi! In the last lesson, we first became acquainted with Java's built-in garbage collector and got a rough idea of how it works. It works in the background while your program is running, collecting unnecessary objects that will be deleted later. Thus, it frees up memory that can be used to create new objects in the future ...

Hi! I think you wouldn't be very surprised if I told you that your computer has a limited amount of memory :) Even your hard drive (which is many, many times the size of RAM) can get chock full of your favorite games, TV shows, and other things. To prevent this from happening, you need to monitor the current state ...

Hi! Today's lesson won't be very long, but it will definitely be useful :) We're going to talk about the so-called ternary operator. Ternary means "composed of three parts". It is an alternative to the if-else control flow statement that you've already met. Let's give an example. Suppose someone decided...

Hello! In previous lections, you already learned how to declare your own full-fledged classes with fields and methods. This is serious progress, well done! But now I have to tell you an unpleasant truth. We didn't declare our classes correctly! Why?

Hi! Last time we talked about constructors and learned a lot about them. Now we're going to talk about base class constructors. What's a base class?It has to do with the fact that in Java several different classes can have a common origin. This is called inheritance. Several child classes can have one common ...

Hi! Today we'll consider a very important topic that concerns our objects. Without exaggeration, we can say you'll use this topic in real life every day! We're talk about constructors. This may be the first time you're hearing this term, but you've actually already used constructors. You just didn't realize it ...

You're probably familiar with the word "bit". If not, let's recall what it means :) A bit is the smallest unit of information in a computer. Its name comes from binary digit. A bit can be expressed by one of two numbers: 1 or 0. There is a special binary number system based on ones and zeros ...

Hi! Today we'll consider a very important topic, namely, numeric operators in Java. In programming, numbers are everywhere. If you dig deep and remember high school, you may recall that a computer represents all information in a numerical format: combinations of zeros and ones, also known as binary code ...