Java Developer

We all love Java here! We're sure you'll love it too once you dive deep into Java and learn this language's true possibilities! Join us! This group features articles and news about Java, and information about what it's like to be a Java programmer. Get answers to your questions and much more.

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Aditi Nawghare Java Developer
16 July 2018 15:23
Reading from the keyboard: "readers" The lessons and tasks in Level 3 taught you how to display stuff on the console, and, moving in the other direction, how to read data from the keyboard. How in the world does this work? In reality, programs are rarely entirely independent. They communicate with other programs, systems, the Internet, etc ...
16.07.2018
41545views
122comments
548
Milan Vucic Java Developer
26 July 2022 9:56
Compare String and Equals comparisons in Java Hi! Today we will talk about a very important and interesting topic, namely, comparing objects with objects. The == operator compares object references, not object properties. Two objects could even have 500 fields with identical values, but comparing them would still yield false. After all, references car1 and car2 ...
26.07.2022
35905views
87comments
521
Vasyl Malik Java Developer
28 July 2022 9:58
Getters and setters 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?
28.07.2022
100975views
88comments
463
Jesse Haniel Java Developer
28 July 2022 10:15
Java Constructors 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 ...
28.07.2022
27943views
83comments
446
Milan Vucic Java Developer
19 July 2018 12:22
More about the garbage collector 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 ...
19.07.2018
27971views
84comments
402
John Selawsky Java Developer
11 January 2023 12:26
Methods in Java Hello again! In the last lesson we got acquainted with classes and constructors, and learned how to create our own. Today we will become better acquainted with methods, an essential part of classes. A method is a set of commands which allow you to perform a specific operation in a program ...
11.01.2023
47363views
130comments
399
Aditi Nawghare Java Developer
9 January 2023 11:44
Java Classes: writing your own classes, constructors Hi! Today we will talk about classes in Java. You could say that classes form the cornerstone of Java programming. When you become a programmer, nearly your entire job will be writing your own classes that have various functions. Let's ...
09.01.2023
56498views
438comments
353
Oleksandr Miadelets Java Developer
20 July 2018 8:53
ArrayList in pictures Hi! Today's lesson about ArrayList will be both easier and harder than previous lessons. It will be more difficult because today we're going to look under the hood of ArrayList and study what happens during various operations. On the other hand, this lesson will have almost no code ...
20.07.2018
18659views
55comments
341
Milan Vucic Java Developer
26 July 2022 11:50
Java Scanner Class Hi! Our lesson today will be special! Previously, the process of completing tasks and writing programs was simple: we write some code, run the main() method, the program does what is required, and we're done. But now everything will change! Today we'll learn how to really interact with the program...
26.07.2022
41946views
67comments
316
Vasyl Malik Java Developer
19 July 2018 11:25
Ternary operator 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...
19.07.2018
19923views
24comments
316
Volodymyr Portianko Java Developer
19 July 2018 9:01
Base class constructors 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 ...
19.07.2018
33622views
54comments
313
Jesse Haniel Java Developer
20 July 2018 9:40
Collections class in Java Hi! In the past few lessons, we've made great progress in our mastery of ArrayList. However, so far we've only performed the simplest operations: remove, insert, and display. Of course, this doesn't cover the full list of tasks that developers must perform when working with ArrayList ...
20.07.2018
15918views
39comments
310

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