Java Timer
1. Timer – the Basics Timer and TimerTask are java util classes used to schedule tasks in a background thread. In a few words – TimerTask is the task to […]
Java
Java – Random Long, Float, Integer and Double
1. Generate an Unbounded Long Let’s start with generating a Long: 2. Generate a Long Within a Range 2.1. Random Long With Plain Java Next […]
Java 8 – Powerful Comparison with Lambdas
1. Overview In this tutorial, we’re going to take a first look at the Lambda support in Java 8 – specifically at how to leverage it […]
Binary Numbers in Java
1. Introduction The binary number system uses 0s and 1s to represent numbers. Computers use binary numbers to store and perform operations on any data. […]
Comparing Objects in Java
1. Introduction Comparing objects is an essential feature of object-oriented programming languages. In this tutorial, we’re going look at some of the features of the […]
Using the Not Operator in If Conditions in Java
1. Introduction In Java’s if-else statements we can take a certain action when an expression is true, and an alternative when it is false. In this tutorial, we’ll learn […]
Control Structures in Java
1. Overview In the most basic sense, a program is a list of instructions. Control structures are programming blocks that can change the path we take […]
Concrete Class in Java
1. Introduction In this quick guide, we’ll discuss the term “concrete class” in Java. First, we’ll define the term. Then, we’ll see how it’s different from […]
A Guide to the finalize Method in Java
1. Overview In this tutorial, we’ll focus on a core aspect of the Java language – the finalize method provided by the root Object class. Simply put, this is […]
Object Type Casting in Java
1. Overview The Java type system is made up of two kinds of types: primitives and references. We covered primitive conversions in this article, and we’ll […]
Wrapper Classes in Java
1. Overview As the name suggests, wrapper classes are objects encapsulating primitive Java types. Each Java primitive has a corresponding wrapper: boolean, byte, short, char, int, […]
Guide to the Volatile Keyword in Java
1. Overview In the absence of necessary synchronizations, the compiler, runtime, or processors may apply all sorts of optimizations. Even though these optimizations are beneficial […]
Inheritance and Composition (Is-a vs Has-a relationship) in Java
1. Overview Inheritance and composition — along with abstraction, encapsulation, and polymorphism — are cornerstones of object-oriented programming (OOP). In this tutorial, we’ll cover the basics of inheritance […]
Using Java Assertions
1. Introduction The Java assert keyword allows developers to quickly verify certain assumptions or state of a program. In this article, we’ll take a look at how to […]
Class Loaders in Java
1. Introduction to Class Loaders Class loaders are responsible for loading Java classes during runtime dynamically to the JVM (Java Virtual Machine). Also, they are part of […]
A Guide to Java 9 Modularity
1. Overview Java 9 introduces a new level of abstraction above packages, formally known as the Java Platform Module System (JPMS), or “Modules” for short. […]
Java – Try with Resources
1. Overview Support for try-with-resources — introduced in Java 7 — allows us to declare resources to be used in a try block with the assurance that the resources […]
Debugging Reactive Streams in Java
1. Overview Debugging reactive streams is probably one of the main challenges we’ll have to face once we start using these data structures. And having in mind […]
Reading an HTTP Response Body as a String in Java
1. Introduction In this tutorial, we’ll explore several libraries for reading an HTTP response body as a string in Java. Since the first versions, Java […]
Test a REST API with Java
1. Overview This tutorial focuses on the basic principles and mechanics of testing a REST API with live Integration Tests (with a JSON payload). The main goal […]
