Lessons

Good is the enemy of the best. To be better means to be better than the others, to surpass them, and to be different. You can't do what everybody else is doing if you're going to be the best. You need your own path. You can't be better at everything. While you're studying everything, somebody else is specializing in a narrow field. The best...

Usually one family lives in a private house, but an apartment building accommodates many. To send a letter to a family living in a private home, you need to provide a house number. But writing a letter to a family that lives in an apartment complex also requires an apartment number. An array variable is like an "apartment" variable. Arrays are super useful structures. It's time to study them!

An array is an ordered set of elements. It's like in an apartment building: each apartment has its own number. An array doesn't actually contain the apartments. Instead, it contains their numbers (that is, references to them). Clear as mud? Your mentor will explain everything! This lesson is about how arrays are arranged in memory and how we can live with it.

Working with arrays is easy. You just need to get used to the fact that we have not one element, but several, with a single identity. So let's take a look at some popular examples and consider how to populate arrays, initialize them, display them, and search for the smallest element. This knowledge is very useful for understanding programming as such.

It's time to tackle some interesting tasks about arrays. Otherwise, your knowledge will become meaningless, like the life of a bank clerk in a matrix... By the way, did you know that the matrix is an array? Only people familiar with the mathematical definition of a matrix will get a kick out of that. Let's reinforce the concept of arrays, and do (a few) more tasks.

"Greetings, Amigo!" "Hello, Rishi!" "You already know a thing or two about arrays, and you even managed to solve some tasks, I hope. But you don't know everything. For example, here's another interesting fact about arrays. Arrays are not only one-dimensional (linear). They can also be two-dimensional...

"Hello, my smartest student!" "Hello, Rishi!" "Are you pining for a new discussion about arrays? Well, today we have one for you! Today I'm going to tell you about jagged and multidimensional arrays." "Sounds bloodthirsty and frightening." "Don't worry, a real programmer can always handle an array...

"Amigo, I hope by now you've realized how useful arrays are in programming?" "Most definitely, Rishi! I've already solved more than one task." "Did your tasks have repetitive actions? The kind that you have done over and over again." "If I understood you correctly, you mean similar actions in different tasks...

"Rishi, I'm really looking forward to learning about the rest of the methods of the Arrays class." "Such zeal for learning cannot but please your old teacher! But, if you really want to find out everything, a kind wizard named Google will help you day and night." "Uh..." "Just kidding. Kind of. Of course, I'll explain everything better...

In this level, you've taken another very important step in learning Java. You learned more about arrays, which will help you work with huge amounts of information. We dug into what arrays are, what types of arrays there are, and how to interact with them. As we conclude this topic, we suggest that you read a couple of...

We're already almost at the end of the fifth level. Very soon we'll be back to doing tasks (including difficult tasks!). But for now, it's a great time to relax! You've heard of the superstar LadyJava, right? No? Time for you to get acquainted with her megahit, which warms the hearts of all Java programmers, regardless of their level.