Page 72 | Java Blog - Java News and Learning posts on CodeGym

Alex Vypirailenko Core Java
March 26, 2020 at 4:42 PM
Examples of reflection Maybe you've encountered the concept of "reflection" in ordinary life. This word usually refers to the process of studying oneself. In programming, it has a similar meaning — it is a mechanism for analyzing data about a program, and even changing the structure and behavior of a program, while the program is running.
3/26/20
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Milan Vucic Java Objects
March 26, 2020 at 3:53 PM
Equals Method in Java: Best Practices Hi! Today we'll talk about two important methods in Java: equals() and hashCode(). This isn't the first time we've met them: the CodeGym course begins with a short lesson about equals() — read it if you've forgotten it or haven't seen it before...
3/26/20
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Oleksandr Miadelets Java Classes
March 26, 2020 at 9:28 AM
Inner classes in a local method Hi! Let's talk about another kind of nested classes. I'm talking about local classes (method-local inner classes). Before diving in, we must first remember their place in the structure of nested classes. From our diagram, we can see that local classes are a subspecies of inner classes...
3/26/20
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John Selawsky Java Classes
March 26, 2020 at 7:43 AM
Nested inner classes Hi! Today we'll take up an important topic: how nested classes work in Java. These internal classes are called nested. They are divided into 2 types: Non-static nested classes (these are also called inner classes), Static nested classes. In turn, inner classes have two distinct subcategories...
3/26/20
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John Selawsky Java Classes
March 26, 2020 at 6:55 AM
Anonymous classes Hi! In today's lesson, we'll continue to examine the topic of nested classes. Now it's time for the last group: anonymous inner classes. Like the local classes that we talked about in the last lesson, anonymous classes are a kind of inner class... They also have several similarities and differences...
3/26/20
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Oleksandr Miadelets Inheritance in Java
March 26, 2020 at 6:00 AM
Examples of inheritance of nested classes Hi! Today we'll look at an important mechanism: inheritance in nested classes. Have you ever thought about what you would do if you needed to make a nested class inherit some other class. If not, believe me: this situation can be confusing, because there are a lot of nuances...
3/26/20
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Alex Vypirailenko Java Classes
March 24, 2020 at 4:45 PM
Enum. Practical examples. Adding constructors and methods Hi! Today we'll talk about one of Java's special data types: Enum (short for "enumeration"). What makes it special? Let's imagine what we need to implement "months" in a program. Doesn't seem problematic, right? We just need to determine what properties that any month has. Perhaps we first need...
3/24/20
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John Dorian Java Developer
March 23, 2020 at 6:04 PM
Your first application using Java servlets Hello, everyone! You will become familiar with servlets as a basic concept of web development, and you will be able to write a simple application that uses them. To avoid unnecessary actions, we won't start from scratch. We'll continue working on our application from my previous article about Hibernate...
3/23/20
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John Dorian Java Developer
March 23, 2020 at 1:58 PM
Your first Hibernate application In this article, you will become familiar with one of the most popular enterprise frameworks for Java and create your first Hibernate application. Never heard of Hibernate? Or maybe you've heard of it, but haven't used it? Or maybe you tried to use it, but failed? In all three cases - welcome to below the cut :)
3/23/20
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Roman B.Java Developer
March 16, 2020 at 2:09 PM
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...
3/16/20
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Aditi Nawghare Serialization in Java
March 11, 2020 at 1:21 PM
What is the difference between serialization and deserialization in Java?Hi! In today's lesson, we talk about serialization and deserialization in Java. We'll start with a simple example. Let's say you've created a computer game. If you grew up in the 90s and remember the game consoles of that era, you...
3/11/20
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CodeGym Java Developer
March 11, 2020 at 10:35 AM
From NASA to the deserts of Africa. Government-sponsored and socially-significant projects written in Java Today we will talk about how Java is used by government agencies and in socially-significant projects around the world. Austria is well-known for its state-of-the-art and convenient social security system, which includes excellent health...
3/11/20
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