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Static and Dynamic Binding in Java 1. Introduction Polymorphism allows an object to take multiple forms – when a method exhibits polymorphism, the compiler has to map the name of the method to the final implementation. If it’s mapped at compile time, it’s a static or early binding. If it’s… Continue Reading java-static-dynamic-binding

Introduction to Project Amber 1. What is Project Amber Project Amber is a current initiative from the developers of Java and OpenJDK, aiming to deliver some small but essential changes to the JDK to make the development process nicer. This has been ongoing since 2017 and has already delivered some… Continue Reading java-project-amber

Insertion Sort in Java 1. Overview In this tutorial, we’re going to discuss the Insertion Sort algorithm and have a look at its Java implementation. Insertion Sort is an efficient algorithm for ordering a small number of items. This method is based on the way card players sort a hand… Continue Reading java-insertion-sort

Singletons in Java 1. Introduction In this quick article, we’ll discuss the two most popular ways of implementing Singletons in plain Java. 2. Class-Based Singleton The most popular approach is to implement a Singleton by creating a regular class and making sure it has: A private constructor A static field… Continue Reading java-singleton

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 interfaces and abstract classes. 2. What is a Concrete Class? A concrete class is a class that we can create… Continue Reading java-concrete-class

Converting a Stack Trace to a String in Java 1. Introduction When dealing with exceptions in Java, we’re frequently logging or simply displaying stack traces. However, sometimes, we don’t want just to print the stack trace, we might need to write the stack trace to a file, to a database… Continue Reading java-stacktrace-to-string

Java equals() and hashCode() Contracts 1. Overview In this tutorial, we’ll introduce two methods that closely belong together: equals() and hashCode(). We’ll focus on their relationship with each other, how to correctly override them, and why we should override both or neither. 2. equals() The Object class defines both the… Continue Reading java-equals-hashcode-contracts

Guide to the Diamond Operator in Java 1. Overview In this article, we’ll look at the diamond operator in Java and how generics and the Collections API influenced its evolution. 2. Raw Types Prior to Java 1.5, the Collections API supported only raw types – there was no way for… Continue Reading java-diamond-operator

Anonymous Classes in Java 1. Introduction In this tutorial, we’ll consider anonymous classes in Java. We’ll describe how we can declare and create instances of them. We’ll also briefly discuss their properties and limitations. 2. Anonymous Class Declaration Anonymous classes are inner classes with no name. Since they have no… Continue Reading java-anonymous-classes