Page 10 | Java Blog - Java News and Learning posts on CodeGym

Jesse Haniel OOP Java
April 23, 2025 at 9:52 AM
Java Polymorphism OOP-related questions are an integral part of the technical interview for a Java developer position in an IT company. In this article, we will talk about one principle of OOP – polymorphism. We'll focus on the aspects that are often asked about during interviews, and also give a few examples for clarity...
4/23/25
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Vasyl Malik Random
April 23, 2025 at 9:22 AM
Reference Variable in Java So, what's a reference variable in Java? It's not what you might think at first. Unlike primitive variables that hold actual values like an int stashing a number reference variables are more like treasure maps
4/23/25
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Pavlo Plynko Java Classes
April 23, 2025 at 8:37 AM
Java Abstract Class (Abstraction in Java)Abstract methods are a powerful tool of Java and give this object-oriented language even more capabilities when it comes to polymorphism. A Java abstract method can be used to create a basic framework for an entire program and enable you to adjust as needed. An abstract method is a method that has no...
4/23/25
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Alex Vypirailenko Random
April 22, 2025 at 6:48 AM
Infinity in Java You remember those wild math class debates where the teacher would go, "Infinity's not a number, it's a concept"? Used to drive me nuts trying to wrap my head around it. But in Java, infinity's not just some abstract idea—it's a real thing you can mess with in your code
4/22/25
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Oleksandr Miadelets Core Java
April 22, 2025 at 6:19 AM
NaN in Java In Java, “NaN” stands for “Not a Number”. It is not a type of exception, rather surprisingly, the datatype of NaN is also a number. But often when novice programmers get it unintentionally, they further use it in their calculations. Hence, incompatible data types in Java...
4/22/25
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Oleksandr Miadelets Random
April 21, 2025 at 9:44 AM
Java Classes and Objects A Java class is like a blueprint for a house. It spells out the design—walls, windows, doors—but it's not a house you can live in. Classes define: Properties (attributes or fields) – what the object knows Methods (functions) – what the object can do Constructors – special methods that create new objects
4/21/25
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Artem Divertitto Java Types
April 21, 2025 at 8:51 AM
Java Type Casting What is Type Casting in Java? A data type is a predefined set of values that specify the type of values that can be stored in it along with the operation that can be carried out on them. The Java Type Casting is a process by which one data type is converted to another...
4/21/25
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Milan Vucic Random
April 10, 2025 at 4:45 PM
Java Constants A Java constant is basically a variable that's locked in—you set it once, and it doesn't budge. Regular variables? They're like flip-flops, changing whenever you want. Constants? They're the stubborn friend who won't move from their spot all night
4/10/25
396views
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Jesse Haniel Methods in Java
April 10, 2025 at 3:19 PM
Java Method Parameters Java method parameters might sound basic, but they've got layers—like an onion, except less tear-inducing. Whether you're just starting out or prepping for a big interview, nailing this concept can save you from
4/10/25
459views
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Pavlo Plynko Methods in Java
April 10, 2025 at 2:50 PM
Method Overloading in Java The Java programming language strutted onto the scene fully embracing the concept of Object-Oriented Programming (OOP). And in the OOP one of the groovy moves is Polymorphism...
4/10/25
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John Selawsky Random
April 9, 2025 at 3:39 PM
Java Multidimensional Array So, multidimensional arrays in Java? They're your go-to when a plain old list won't cut it—think game boards, spreadsheets, or math grids. They're arrays of arrays, stacking data into rows and columns
4/9/25
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Pavlo Plynko Java Types
April 9, 2025 at 3:08 PM
Java Variables In this article, we are going to explain to all Java learners what Java variables are and how to work with them. A variable in Java can be thought of as a box. This "box" has a certain size...
4/9/25
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