Java Developer

CodeGym/Java Blog/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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John Selawsky Java Developer
4 September 2019 9:25
8 common mistakes made by rookie programmers Hi! Today we'll look at 8 very common mistakes made by rookie (and other) Java developers. You'll find plenty of such lists on the web: many of them are similar to one another. As we compiled our list, we were guided by one criterion: whether we made the mistakes ourselves during our studies or employment...
04.09.2019
12000views
19comments
168
Aditi Nawghare Java Developer
15 May 2020 6:38
Why Do We Need Interfaces in Java Hi! Today we're going to talk about an important concept in Java: interfaces.The word is probably familiar to you. For example, most computer programs and games have interfaces. In a broad sense, an interface is a kind of 'remote control' that connects two interacting parties...
15.05.2020
16698views
27comments
147
Vasyl Malik Java Developer
10 January 2023 8:30
25 Best Java Books For Beginners and Advanced learners In 2023 Getting the hang of coding might be confusing for a complete beginner. There are dozens and dozens of Java books on Amazon — it’s so easy to get lost! How about a little piece of advice, based on experience of the other Java learners? If you still haven’t put together your reading list for 2023...
10.01.2023
144228views
16comments
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Milan Vucic Java Developer
5 February 2019 11:34
Top 21 Java interview questions There are myriads of Java interview questions and we can’t collect all of them in one article. However here you can find some very common Java interview questions, according to HR-managers of IT companies. “Disassemble” public static void main(String args[])...
05.02.2019
19838views
11comments
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Eugene Kuzmin Java Developer
14 December 2021 7:49
What to do if you've already "learned" Core Java, but it isn't enough for employment Hello everyone. Allow me to introduce myself. I'm Eugene. And I've been working as a Java developer for half a year :-) My entire path from Level 0 to employment...
14.12.2021
3908views
5comments
28
Roman B.Java Developer
16 March 2020 14:09
Debugging in IntelliJ IDEA: a beginner's guide Hello everyone in the CodeGym community! Today let's talk about debugging — what is it and how to debug in IntelliJ IDEA. This article is intended for people who already have a minimum knowledge of Java Core. There won't be any frameworks or complicated procedures to publish libraries. A leisurely stroll...
16.03.2020
12345views
15comments
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Professor Hans Noodles Java Developer
5 May 2020 14:39
Part 1. What you need to know before learning Spring and JavaEE If you've already finished (or are close to) learning Java SE, then it's time to think about your next steps in conquering the profession of a Java developer. On the one hand, you already have a good understanding of Java: you know how to work with an IDE, write programs, and much more...
05.05.2020
4253views
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Professor Hans Noodles Java Developer
5 May 2020 17:00
Part 7. Introducing the MVC (Model-View-Controller) pattern In this article we'll get to know something called MVC. We'll talk about what MVC is, touch on its history, explore the basic ideas and concepts embodied in MVC, take a step-by-step look at how to break up an application into Model, View, and Controller modules, write a small web application using Spring Boot...
05.05.2020
3894views
3comments
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John Selawsky Java Developer
29 August 2022 7:29
XML in Java Hi! Today we will introduce another data format called XML. This is a very important topic. When working on real Java applications, you will almost certainly encounter XML-related tasks. In Java development, this format is used almost universally (we will find out why below), so I recommend...
29.08.2022
3798views
0comments
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CodeGym Java Developer
23 March 2020 12:29
Tricky Java questions frequently asked at interviews If you've ever prepared for an interview for a Java programmer position or passed any certification exam (not necessarily about programming), then you've probably already noticed that the questions asked there are very specific. Many of them force you think about the language's design. Some are designed to probe...
23.03.2020
4083views
10comments
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Roman B.Java Developer
6 August 2020 10:48
Top 50 job interview questions and answers for Java Core. Part 1 Hello everyone, ladies and gentlemen, software engineers! Let's talk about interview questions. About what you need to prepare for and what you need to know. This is a great time to review or to study these points for the first time. I ended up with a rather extensive collection of frequently asked questions...
06.08.2020
6341views
3comments
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Professor Hans Noodles Java Developer
5 May 2020 16:00
Part 5. Servlets and the Java Servlet API. Writing a simple web application Do you already know how to write Java applications that display text on the console, but you still don't really know how to create your first web application? Great, make yourself comfortable. In this article, we'll get acquainted with...
05.05.2020
6631views
0comments
16